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ASP.NET获取服务器信息方法

Code

if (!IsPostBack)

            {

                Label1.Text = "服务器名称："+Server.MachineName;//服务器名称

                Label2.Text = "服务器IP地址：" + Request.ServerVariables["LOCAL_ADDR"];//服务器IP地址

                Label3.Text = "服务器域名：" + Request.ServerVariables["SERVER_NAME"];//服务器域名

                Label4.Text = ".NET解释引擎版本：" + ".NET CLR" + Environment.Version.Major + "." + Environment.Version.Minor + "." + Environment.Version.Build + "." + Environment.Version.Revision;//.NET解释引擎版本

                Label5.Text = "服务器操作系统版本：" + Environment.OSVersion.ToString();//服务器操作系统版本

                Label6.Text = "服务器IIS版本：" + Request.ServerVariables["SERVER_SOFTWARE"];//服务器IIS版本

                Label7.Text = "HTTP访问端口：" + Request.ServerVariables["SERVER_PORT"];//HTTP访问端口

                Label8.Text = "虚拟目录的绝对路径：" + Request.ServerVariables["APPL_RHYSICAL_PATH"];//虚拟目录的绝对路径

                Label9.Text = "执行文件的绝对路径：" + Request.ServerVariables["PATH_TRANSLATED"];//执行文件的绝对路径

                Label10.Text = "虚拟目录Session总数：" + Session.Contents.Count.ToString();//虚拟目录Session总数

                Label11.Text = "虚拟目录Application总数：" + Application.Contents.Count.ToString();//虚拟目录Application总数

                Label12.Text = "域名主机：" + Request.ServerVariables["HTTP_HOST"];//域名主机

                Label13.Text = "服务器区域语言：" + Request.ServerVariables["HTTP_ACCEPT_LANGUAGE"];//服务器区域语言

                Label14.Text = "用户信息：" + Request.ServerVariables["HTTP_USER_AGENT"];

                Label14.Text="CPU个数："+Environment.GetEnvironmentVariable("NUMBER_OF_PROCESSORS");//CPU个数

                Label15.Text = "CPU类型：" + Environment.GetEnvironmentVariable("PROCESSOR_IDENTIFIER");//CPU类型

                Label16.Text = "进程开始时间：" + GetPrStart();//进程开始时间

                Label17.Text = "AspNet 内存占用：" + GetAspNetN();//AspNet 内存占用

                Label18.Text = "AspNet CPU时间：" + GetAspNetCpu();//AspNet CPU时间

                Label19.Text = "FSO 文本文件读写：" + Check("Scripting.FileSystemObject");//FSO 文本文件读写

                Label20.Text = "应用程序占用内存" + GetServerAppN();//应用程序占用内存

            }

ASP.NET获取客户端信息

Code

客户端IP：Page.Request.UserHostAddress

用户信息：Page.User;

服务器电脑名称：Page.Server.MachineName

当前用户电脑名称： System.Net.Dns.GetHostName()

当前电脑名： System.Environment.MachineName

当前电脑所属网域： System.Environment.UserDomainName

当前电脑用户： System.Environment.UserName

浏览器类型：Request.Browser.Browser

浏览器标识：Request.Browser.Id

浏览器版本号：Request.Browser.Version

浏览器是不是测试版本：Request.Browser.Beta

浏览器的分辨率(像素)：Request["width"].ToString() + "*" + Request["height"].ToString();//1280/1024

客户端的操作系统：Request.Browser.Platform

是不是win16系统：Request.Browser.Win16

是不是win32系统：Request.Browser.Win32

//透过代理取IP

string GetIp()

{

//可以透过代理服务器

string userIP = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

if (userIP == null || userIP == "")

{

//没有代理服务器,如果有代理服务器获取的是代理服务器的IP

userIP = Request.ServerVariables["REMOTE_ADDR"];

}

return userIP;

}

 C#实现页面加载

Code

protected void Page_Load(object sender, EventArgs e)

    {

        Loading();

    }

public void Loading()

    {

        HttpContext hc = HttpContext.Current;

        //创建一个页面居中的div

        hc.Response.Write("<div id='loading'style='position: absolute; height: 100px; text-align: center;z-index: 9999; left: 50%; top: 50%; margin-top: -50px; margin-left: -175px;'> ");

        hc.Response.Write("<br />页面正在加载中，请稍候<br /><br /> ");

        hc.Response.Write("<table border='0' cellpadding='0' cellspacing='0' style='background-image: url(images/Progress/plan-bg.gif);text-align: center; width: 300px;'> ");

        hc.Response.Write("<tr><td style='height: 20px; text-align: center'><marquee direction='right' scrollamount='30' width='290px'> <img height='10' src='images/Progress/plan-wait.gif' width='270' />");

        hc.Response.Write("</marquee></td></tr></table></div>");

        //hc.Response.Write("<script>mydiv.innerText = '';</script>");

        hc.Response.Write("<script type=text/javascript>");

        //最重要是这句了,重写文档的onreadystatechange事件,判断文档是否加载完毕

        hc.Response.Write("function document.onreadystatechange()");

        hc.Response.Write(@"{ try  

                                   {

                                    if (document.readyState == 'complete') 

                                    {

                                         delNode('loading');

                                        

                                    }

                                   }

                                 catch(e)

                                    {

                                        alert('页面加载失败');

                                    }

                                                        } 

                            function delNode(nodeId)

                            {   

                                try

                                {   

                                      var div =document.getElementById(nodeId); 

                                      if(div !==null)

                                      {

                                          div.parentNode.removeChild(div);   

                                          div=null;    

                                          CollectGarbage(); 

                                      } 

                                }

                                catch(e)

                                {   

                                   alert('删除ID为'+nodeId+'的节点出现异常');

                                }   

                            }

                            ");

        hc.Response.Write("</script>");

        hc.Response.Flush();

    }

 Http请求图片显示：

Code

public Image byteArrayToImage()    

{        

WebRequest myWebRequest = WebRequest.Create("图片地址");        

using (WebResponse myWebResponse = myWebRequest.GetResponse())        

{            using (Stream ReceiveStream = myWebResponse.GetResponseStream())            {                byte[] byteArrayIn = new byte[ReceiveStream.Length];                

using (MemoryStream ms = new MemoryStream(byteArrayIn))                

{       

Image.FromStream(ms);                

}            

}        

}

}

通过文件流判断文件编码:

Code

public static System.Text.Encoding GetFileEncode(Stream stream)

        {

            BinaryReader br = new BinaryReader(stream, Encoding.Default);

            byte[] bb = br.ReadBytes(3);

            br.Close();

            //通过头的前三位判断文件的编码

            if (bb[0] >= 0xFF)

            {

                if (bb[0] == 0xEF && bb[1] == 0xBB && bb[2] == 0xBF)

                {

                    return Encoding.UTF8;

                }

                else if (bb[0] == 0xFE && bb[1] == 0xFF)

                {

                    return Encoding.BigEndianUnicode;

                }

                else if (bb[0] == 0xFF && bb[1] == 0xFE)

                {

                    return Encoding.Unicode;

                }

                else

                {

                    return Encoding.Default;

                }

            }

            else

            {

                return Encoding.Default;

            }

        }

 

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将文件转换成字符串,常用于读取网站模板

Code

/// <summary>

    /// 将文件转换成字符串,常用于读取网站模板

    /// </summary>

    /// <param name="path"></param>

    /// <param name="isSpace"></param>

    /// <returns></returns>

    public static string GetTempleContent(string path)

    {

        string result = string.Empty;

        string sFileName = HttpContext.Current.Server.MapPath(path);

        if (File.Exists(sFileName))

        {

            try

            {

                using (StreamReader sr = new StreamReader(sFileName))

                {

                    result = sr.ReadToEnd();

                }

            }

            catch

            {

                result = "读取模板文件(" + path + ")出错";

            }

        }

        else

        {

            result = "找不到模板文件：" + path;

        }

        return result;

    }

 

读取,添加，修改xml文件

Code

/// <summary>

    /// 读取,添加，修改xml文件

    /// </summary>

    /// <param name="Xmlpath">Xml路径</param>

    /// <param name="Node">新的子节点名称</param>

    /// <param name="Value">新节点对应的值</param>

    /// <param name="flag">1：读取，否则为 修改或者添加</param>

    /// <returns>1：修改添加成功，为空字符串表示修改添加成功，否则是读取成功</returns>

    public static string getXML(string Xmlpath, string Node, string Value, int flag)

    {

        try

        {

            string filepath = HttpContext.Current.Server.MapPath(Xmlpath);

            XmlDocument xmlDoc = new XmlDocument();

            if (!File.Exists(filepath))

            {

                XmlDeclaration xn = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null);

                XmlElement root = xmlDoc.CreateElement("rss");

                XmlElement root1 = xmlDoc.CreateElement("item");

                root.AppendChild(root1);

                xmlDoc.AppendChild(xn);

                xmlDoc.AppendChild(root);

                xmlDoc.Save(filepath);//本地路径名字

            }

            xmlDoc.Load(filepath);//你的xml文件

            string ReStr = string.Empty;

            XmlElement xmlObj = xmlDoc.DocumentElement;

            XmlNodeList xmlList = xmlDoc.SelectSingleNode(xmlObj.Name.ToString()).ChildNodes;

            foreach (XmlNode xmlNo in xmlList)

            {

                if (xmlNo.NodeType != XmlNodeType.Comment)//判断是不是注释类型

                {

                    XmlElement xe = (XmlElement)xmlNo;

                    {

                        if (xe.Name == xmlObj.FirstChild.Name)

                        {

                            XmlNodeList xmlNList = xmlObj.FirstChild.ChildNodes;

                            foreach (XmlNode xmld in xmlNList)

                            {

                                XmlElement xe1 = (XmlElement)xmld;

                                {

                                    if (xe1.Name == Node)

                                    {

                                        if (flag == 1)//读取值

                                        {

                                            if (xmld.InnerText != null && xmld.InnerText != "")

                                            {

                                                ReStr = xmld.InnerText;

                                            }

                                        }

                                        else//修改值

                                        {

                                            xmld.InnerText = Value;//给节点赋值

                                            xmlDoc.Save(filepath);

                                            ReStr = Value.Trim();

                                        }

                                    }

                                }

                            }

                            if (ReStr == string.Empty)// 添加节点

                            {

                                XmlNode newNode;

                                newNode = xmlDoc.CreateNode("element", Node, Value);//创建节点

                                newNode.InnerText = Value;//给节点赋值

                                xe.AppendChild(newNode);//把节点添加到doc

                                xmlDoc.Save(filepath);

                                ReStr = Value.Trim();

                            }

                        }

                    }

                }

            }

            return ReStr;

        }

        catch

        {

            return string.Empty;

        }

    }

 

取得文件扩展名

Code

/// <summary>

    /// 取得文件扩展名

    /// </summary>

    /// <param name="filename">文件名</param>

    /// <returns>扩展名</returns>

    public static string GetFileEXT(string filename)

    {

        if (string.IsNullOrEmpty(filename))

        {

            return "";

        }

        if (filename.IndexOf(@".") == -1)

        {

            return "";

        }

        int pos = -1;

        if (!(filename.IndexOf(@"/") == -1))

        {

            pos = filename.LastIndexOf(@"/");

        }

        string[] s = filename.Substring(pos + 1).Split('.');

        return s[1];

    }

 

替换文本中的空格和换行

Code

/// <summary>

    /// 替换文本中的空格和换行

    /// </summary>

    public static string ReplaceSpace(string str)

    {

        string s = str;

        s = s.Replace(" ", "&nbsp;");

        s = s.Replace("/n", "<BR />");

        return s;

    }

 

验证码实现方法

Code

    protected void Page_Load(object sender, EventArgs e)

    {

         string checkCode = CreateRandomCode(4);

          Session["CheckCode"] = checkCode;

          CreateImage(checkCode);

    }

     private string CreateRandomCode(int codeCount)

    {

        // 函数功能:产生数字和字符混合的随机字符串

        string allChar = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

        char[] allCharArray = allChar.ToCharArray();

        string randomCode = "";

        Random rand = new Random();

        for (int i = 0; i < codeCount; i++)

        {

           int r=rand.Next(61);

           randomCode+=allCharArray.GetValue(r);

        }

         return randomCode;

        

     }

         

    private void CreateImage(string checkCode)

    {

        // 生成图象验证码函数

       int iwidth = (int)(checkCode.Length * 11.5);

        System.Drawing.Bitmap image = new System.Drawing.Bitmap(iwidth, 20);

        Graphics g = Graphics.FromImage(image);

        Font f = new System.Drawing.Font("Arial", 10, System.Drawing.FontStyle.Bold);

        Brush b = new System.Drawing.SolidBrush(Color.Azure);//字母白色

        //g.FillRectangle(new System.Drawing.SolidBrush(Color.Blue),0,0,image.Width, image.Height);

        g.Clear(Color.Brown);//背景灰色

        g.DrawString(checkCode, f, b, 3, 3);

        Pen blackPen = new Pen(Color.Black, 0);

        Random rand = new Random();

        System.IO.MemoryStream ms = new System.IO.MemoryStream();

        image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

        Response.ClearContent();

        Response.ContentType = "image/Jpeg";

        Response.BinaryWrite(ms.ToArray());

        g.Dispose();

        image.Dispose();

    }

 

文件创建、复制、移动、删除

Code

FileStream fs;

 //创建文件

 fs = File.Create(Server.MapPath("a.txt"));

 fs.Close();

 fs = File.Create(Server.MapPath("b.txt"));

 fs.Close();

 fs = File.Create(Server.MapPath("c.txt"));

 fs.Close();

 //复制文件

 File.Copy(Server.MapPath("a.txt"), Server.MapPath("a//a.txt"));

 //移动文件

 File.Move(Server.MapPath("b.txt"), Server.MapPath("a//b.txt"));

 File.Move(Server.MapPath("c.txt"), Server.MapPath("a//c.txt"));

 //删除文件

 File.Delete(Server.MapPath("a.txt"));

 

去掉结尾 

 

Code

/// <summary>

    /// 去掉结尾，

    /// </summary>

    /// <param name="input"></param>

    /// <returns></returns>

    public static string LostDot(string input)

    {

        if (string.IsNullOrEmpty(input))

        {

            return string.Empty;

        }

        else

        {

            if (input.IndexOf(",") > -1)

            {

                int intLast = input.LastIndexOf(",");

                if ((intLast + 1) == input.Length)

                {

                    return input.Remove(intLast);

                }

                else

                {

                    return input;

                }

            }

            else

            {

                return input;

            }

        }

    }

 

生成任意位数的随机数

Code

/// <summary>

    /// 生成随机数

    /// </summary>

    /// <param name="minValue">最小值</param>

    /// <param name="maxValue">最大值</param>

    /// <returns></returns>

    private int getRandom(int minValue, int maxValue)

    {

        Random ri = new Random(unchecked((int)DateTime.Now.Ticks));

        int k = ri.Next(minValue, maxValue);

        return k;

    }

//想定一个三位的随机数：string ThreeRandom=this.getRandom(100,999).Tostring();

//类似的，四位随机数：string FourRandom=this.getRandom(1000,9999).Tostring();

 

实现文件的上传 

Code

public class Upload

    {

        private System.Web.HttpPostedFile postedFile = null;

        private string savePath = "";

        private string extension = "";

        private int fileLength = 0;

        private string filename = "";

        /// <summary>

        /// 上传组件

        /// </summary>

        public System.Web.HttpPostedFile PostedFile

        {

            get

            {

                return postedFile;

            }

            set

            {

                postedFile = value;

            }

        }

        /// <summary>

        /// 保存路径

        /// </summary>

        public string SavePath

        {

            get

            {

                if (savePath != "") return savePath;

                return "c://";

            }

            set

            {

                savePath = value;

            }

        }

        /// <summary>

        /// 文件大小

        /// </summary>

        public int FileLength

        {

            get

            {

                if (fileLength != 0) return fileLength;

                return 1024;

            }

            set

            {

                fileLength = value * 1024;

            }

        }

        /// <summary>

        /// 文件护展名

        /// </summary>

        public string Extension

        {

            get

            {

                if (extension != "")

                    return extension;

                return "txt";

            }

            set

            {

                extension = value;

            }

        }

        /// <summary>

        /// 文件名

        /// </summary>

        public string FileName

        {

            get

            {

                return filename;

            }

            set

            {

                filename = value;

            }

        }

        public string PathToName(string path)

        {

            int pos = path.LastIndexOf(@"/");

            return path.Substring(pos + 1);

        }

        /// <summary>

        /// 上传文件

        /// </summary>

        /// <returns></returns>

        public string UploadStart()

        {

            bool tf = false;

            string returnvalue = "";

            if (PostedFile != null)

            {

                try

                {

                    string fileName = PathToName(PostedFile.FileName);

                    if (filename != "")

                    {

                        fileName = filename;

                    }

                    string _fileName = "";

                    string[] Exten = Extension.Split(',');

                    if (Exten.Length == 0)

                    {

                        returnvalue = "你未设置上传文件类型,系统不允许进行下一步操作!";

                    }

                    else

                    {

                        for (int i = 0; i < Exten.Length; i++)

                        {

                            if (fileName.ToLower().EndsWith(Exten[i].ToLower()))

                            {

                                if (PostedFile.ContentLength > FileLength)

                                {

                                    returnvalue = "上传文件限制大小:" + FileLength / 1024 + "kb!";

                                }

                                string IsFileex = SavePath + @"/" + fileName;

                                if (!Directory.Exists(SavePath)) { Directory.CreateDirectory(SavePath); }

                                PostedFile.SaveAs(IsFileex);

                                _fileName = fileName;

                                tf = true;

                                returnvalue = IsFileex ;

                            }

                        }

                        if (tf == false)

                            returnvalue = "只允许上传" + Extension + " 文件!";

                    }

                }

                catch (System.Exception exc)

                {

                    returnvalue = exc.Message;

                }

            }

            else

            {

                returnvalue = "上文件失败!";

            }

            return returnvalue;

        }

    }

 

判断输入是否为日期类型

Code

 /// <summary>

        /// 判断输入是否为日期类型

        /// </summary>

        /// <param name="s">待检查数据</param>

        /// <returns></returns>

        public static bool IsDate(string s)

        {

            if (s == null)

            {

                return false;

            }

            else

            {

                try

                {

                    DateTime d = DateTime.Parse(s);

                    return true;

                }

                catch

                {

                    return false;

                }

            }

        }

 

MD5加密字符串处理

Code

/// <summary>

        /// MD5加密字符串处理

        /// </summary>

        /// <param name="Half">加密是16位还是32位；如果为true为16位</param>

        public static string MD5(string Input, bool Half)

        {

            string output = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(Input, "MD5").ToLower();

            if (Half) output = output.Substring(8, 16);

            return output;

        }

        public static string MD5(string Input)

        {

            return MD5(Input, true);

        }

 

过滤非法字符，防止注入式攻击等

Code

/// <summary>

        /// 过滤字符

        /// </summary>

        public static string Filter(string sInput)

        {

            if (sInput == null || sInput.Trim() == string.Empty)

                return null;

            string sInput1 = sInput.ToLower();

            string output = sInput;

            string pattern = @"*|and|exec|insert|select|delete|update|count|master|truncate|declare|char(|mid(|chr(|'";

            if (Regex.Match(sInput1, Regex.Escape(pattern), RegexOptions.Compiled | RegexOptions.IgnoreCase).Success)

            {

                throw new Exception("字符串中含有非法字符!");

            }

            else

            {

                output = output.Replace("'", "''");

            }

            return output;

        }

 

常用的加密解密（DES，RSA）

Code

    using System.Security.Cryptography;

using System.Text;

    /// <summary>

    /// DES加密

    /// </summary>

    /// <param name="input">待加密的字符串</param>

    /// <param name="key">加密密钥</param>

    /// <returns></returns>

    public static string Encrypt(string EncryptString, byte[] Key, byte[] IV)

    {

        //byte[] rgbKey = Encoding.UTF8.GetBytes(key.Substring(0, 8));

        byte[] inputByteArray = Encoding.UTF8.GetBytes(EncryptString);

        DESCryptoServiceProvider des = new DESCryptoServiceProvider();

        MemoryStream mStream = new MemoryStream();

        CryptoStream cStream = new CryptoStream(mStream, des.CreateEncryptor(Key, IV), CryptoStreamMode.Write);

        cStream.Write(inputByteArray, 0, inputByteArray.Length);

        cStream.FlushFinalBlock();

        return Convert.ToBase64String(mStream.ToArray());

    }

    /// <summary>

    /// DES解密

    /// </summary>

    /// <param name="input">待解密的字符串</param>

    /// <param name="key">解密密钥,要求为8位,和加密密钥相同</param>

    /// <returns>解密成功返回解密后的字符串,失败返源串</returns>

    public static string Decrypt(string DecryptString, byte[] Key, byte[] IV)

    {

        try

        {

            //byte[] rgbKey = Encoding.UTF8.GetBytes(Key);

            byte[] inputByteArray = Convert.FromBase64String(DecryptString);

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            MemoryStream mStream = new MemoryStream();

            CryptoStream cStream = new CryptoStream(mStream, des.CreateDecryptor(Key, IV), CryptoStreamMode.Write);

            cStream.Write(inputByteArray, 0, inputByteArray.Length);

            cStream.FlushFinalBlock();

            return Encoding.UTF8.GetString(mStream.ToArray());

        }

        catch

        {

            return "";

        }

    }

}

/// <summary>

/// RSA加解密算法

/// </summary>

public class RSA

{

    /// <summary>

    /// RSA加密函数

    /// </summary>

    /// <param name="xmlPublicKey">说明KEY必须是XML的行式,返回的是字符串</param>

    /// <param name="EncryptString"></param>

    /// <returns></returns>

    public string Encrypt(string xmlPublicKey, string EncryptString)

    {

        byte[] PlainTextBArray;

        byte[] CypherTextBArray;

        string Result;

        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();

        rsa.FromXmlString(xmlPublicKey);

        PlainTextBArray = (new UnicodeEncoding()).GetBytes(EncryptString);

        CypherTextBArray = rsa.Encrypt(PlainTextBArray, false);

        Result = Convert.ToBase64String(CypherTextBArray);

        return Result;

    }

    /// <summary>

    /// RSA解密函数

    /// </summary>

    /// <param name="xmlPrivateKey"></param>

    /// <param name="DecryptString"></param>

    /// <returns></returns>

    public string Decrypt(string xmlPrivateKey, string DecryptString)

    {

        byte[] PlainTextBArray;

        byte[] DypherTextBArray;

        string Result;

        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();

        rsa.FromXmlString(xmlPrivateKey);

        PlainTextBArray = Convert.FromBase64String(DecryptString);

        DypherTextBArray = rsa.Decrypt(PlainTextBArray, false);

        Result = (new UnicodeEncoding()).GetString(DypherTextBArray);

        return Result;

    }

    /// <summary>

    /// 产生RSA的密钥

    /// </summary>

    /// <param name="xmlKeys">私钥</param>

    /// <param name="xmlPublicKey">公钥</param>

    public void RSAKey(out string xmlKeys, out string xmlPublicKey)

    {

        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();

        xmlKeys = rsa.ToXmlString(true);

        xmlPublicKey = rsa.ToXmlString(false);

    }

 

写入读取Cookie值

Code

/// <summary>

        /// 写cookie值

        /// </summary>

        /// <param name="strName">名称</param>

        /// <param name="strValue">值</param>

        /// <param name="strValue">过期时间(分钟)</param>

        public static void WriteCookie(string strName, string strValue, int expires)

        {

            HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];

            if (cookie == null)

            {

                cookie = new HttpCookie(strName);

            }

            cookie.Value = strValue;

            cookie.Expires = DateTime.Now.AddMinutes(expires);

            HttpContext.Current.Response.AppendCookie(cookie);

        }

        /// <summary>

        /// 读cookie值

        /// </summary>

        /// <param name="strName">名称</param>

        /// <returns>cookie值</returns>

        public static string GetCookie(string strName)

        {

            if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies[strName] != null)

            {

                return HttpContext.Current.Request.Cookies[strName].Value.ToString();

            }

            return "";

        }

 

读取配置文件的节点内容

Code

/// <summary>

        /// 读取配置文件

        /// </summary>

        /// <param name="Target"></param>

        /// <param name="ConfigPathName"></param>

        /// <returns></returns>

        static internal string GetConfigValue(string Target, string XmlPath)

        {

            System.Xml.XmlDocument xdoc = new XmlDocument();

            xdoc.Load(XmlPath);

            XmlElement root = xdoc.DocumentElement;

            XmlNodeList elemList = root.GetElementsByTagName(Target);

            return elemList[0].InnerXml;

        }

 

取单个字符的拼音声母

Code

/// <summary> 

        /// 取单个字符的拼音声母 

        /// </summary> 

        /// <param name="c">要转换的单个汉字</param> 

        /// <returns>拼音声母</returns> 

        private static string GetPYChar(string c)

        {

            byte[] array = new byte[2];

            array = System.Text.Encoding.Default.GetBytes(c);

            int i = (short)(array[0] - '/0') * 256 + ((short)(array[1] - '/0'));

            if (i < 0xB0A1) return "*";

            if (i < 0xB0C5) return "A";

            if (i < 0xB2C1) return "B";

            if (i < 0xB4EE) return "C";

            if (i < 0xB6EA) return "D";

            if (i < 0xB7A2) return "E";

            if (i < 0xB8C1) return "F";

            if (i < 0xB9FE) return "G";

            if (i < 0xBBF7) return "H";

            if (i < 0xBFA6) return "G";

            if (i < 0xC0AC) return "K";

            if (i < 0xC2E8) return "L";

            if (i < 0xC4C3) return "M";

            if (i < 0xC5B6) return "N";

            if (i < 0xC5BE) return "O";

            if (i < 0xC6DA) return "P";

            if (i < 0xC8BB) return "Q";

            if (i < 0xC8F6) return "R";

            if (i < 0xCBFA) return "S";

            if (i < 0xCDDA) return "T";

            if (i < 0xCEF4) return "W";

            if (i < 0xD1B9) return "X";

            if (i < 0xD4D1) return "Y";

            if (i < 0xD7FA) return "Z";

            return "*";

        }

 

变量.ToString()

Code

   //字符型转换 转为字符串  

   12345.ToString("n");        //生成   12,345.00  

   12345.ToString("C");        //生成 ￥12,345.00  

   12345.ToString("e");        //生成 1.234500e+004  

   12345.ToString("f4");        //生成 12345.0000  

   12345.ToString("x");         //生成 3039  (16进制)  

   12345.ToString("p");         //生成 1,234,500.00%  

 

时间的处理

Code

DateTime dt = DateTime.Now;

Label1.Text = dt.ToString();//2005-11-5 13:21:25

Label2.Text = dt.ToFileTime().ToString();//127756416859912816

Label3.Text = dt.ToFileTimeUtc().ToString();//127756704859912816

Label4.Text = dt.ToLocalTime().ToString();//2005-11-5 21:21:25

Label5.Text = dt.ToLongDateString().ToString();//2005年11月5日

Label6.Text = dt.ToLongTimeString().ToString();//13:21:25

Label7.Text = dt.ToOADate().ToString();//38661.5565508218

Label8.Text = dt.ToShortDateString().ToString();//2005-11-5

Label9.Text = dt.ToShortTimeString().ToString();//13:21

Label10.Text = dt.ToUniversalTime().ToString();//2005-11-5 5:21:25

?2005-11-5 13:30:28.4412864

Label1.Text = dt.Year.ToString();//2005

Label2.Text = dt.Date.ToString();//2005-11-5 0:00:00

Label3.Text = dt.DayOfWeek.ToString();//Saturday

Label4.Text = dt.DayOfYear.ToString();//309

Label5.Text = dt.Hour.ToString();//13

Label6.Text = dt.Millisecond.ToString();//441

Label7.Text = dt.Minute.ToString();//30

Label8.Text = dt.Month.ToString();//11

Label9.Text = dt.Second.ToString();//28

Label10.Text = dt.Ticks.ToString();//632667942284412864

Label11.Text = dt.TimeOfDay.ToString();//13:30:28.4412864

Label1.Text = dt.ToString();//2005-11-5 13:47:04

Label2.Text = dt.AddYears(1).ToString();//2006-11-5 13:47:04

Label3.Text = dt.AddDays(1.1).ToString();//2005-11-6 16:11:04

Label4.Text = dt.AddHours(1.1).ToString();//2005-11-5 14:53:04

Label5.Text = dt.AddMilliseconds(1.1).ToString();//2005-11-5 13:47:04

Label6.Text = dt.AddMonths(1).ToString();//2005-12-5 13:47:04

Label7.Text = dt.AddSeconds(1.1).ToString();//2005-11-5 13:47:05

Label8.Text = dt.AddMinutes(1.1).ToString();//2005-11-5 13:48:10

Label9.Text = dt.AddTicks(1000).ToString();//2005-11-5 13:47:04

Label10.Text = dt.CompareTo(dt).ToString();//0

//Label11.Text = dt.Add(?).ToString();//问号为一个时间段

Label1.Text = dt.Equals("2005-11-6 16:11:04").ToString();//False

Label2.Text = dt.Equals(dt).ToString();//True

Label3.Text = dt.GetHashCode().ToString();//1474088234

Label4.Text = dt.GetType().ToString();//System.DateTime

Label5.Text = dt.GetTypeCode().ToString();//DateTime

Label1.Text = dt.GetDateTimeFormats('s')[0].ToString();//2005-11-05T14:06:25

Label2.Text = dt.GetDateTimeFormats('t')[0].ToString();//14:06

Label3.Text = dt.GetDateTimeFormats('y')[0].ToString();//2005年11月

Label4.Text = dt.GetDateTimeFormats('D')[0].ToString();//2005年11月5日

Label5.Text = dt.GetDateTimeFormats('D')[1].ToString();//2005 11 05

Label6.Text = dt.GetDateTimeFormats('D')[2].ToString();//星期六 2005 11 05

Label7.Text = dt.GetDateTimeFormats('D')[3].ToString();//星期六 2005年11月5日

Label8.Text = dt.GetDateTimeFormats('M')[0].ToString();//11月5日

Label9.Text = dt.GetDateTimeFormats('f')[0].ToString();//2005年11月5日 14:06

Label10.Text = dt.GetDateTimeFormats('g')[0].ToString();//2005-11-5 14:06

Label11.Text = dt.GetDateTimeFormats('r')[0].ToString();//Sat, 05 Nov 2005 14:06:25 GMT

Label1.Text =? string.Format("{0:d}",dt);//2005-11-5

Label2.Text =? string.Format("{0:D}",dt);//2005年11月5日

Label3.Text =? string.Format("{0:f}",dt);//2005年11月5日 14:23

Label4.Text =? string.Format("{0:F}",dt);//2005年11月5日 14:23:23

Label5.Text =? string.Format("{0:g}",dt);//2005-11-5 14:23

Label6.Text =? string.Format("{0:G}",dt);//2005-11-5 14:23:23

Label7.Text =? string.Format("{0:M}",dt);//11月5日

Label8.Text =? string.Format("{0:R}",dt);//Sat, 05 Nov 2005 14:23:23 GMT

Label9.Text =? string.Format("{0:s}",dt);//2005-11-05T14:23:23

Label10.Text = string.Format("{0:t}",dt);//14:23

Label11.Text = string.Format("{0:T}",dt);//14:23:23

Label12.Text = string.Format("{0:u}",dt);//2005-11-05 14:23:23Z

Label13.Text = string.Format("{0:U}",dt);//2005年11月5日 6:23:23

Label14.Text = string.Format("{0:Y}",dt);//2005年11月

Label15.Text = string.Format("{0}",dt);//2005-11-5 14:23:23?

Label16.Text = string.Format("{0:yyyyMMddHHmmssffff}",dt); //yyyymm等可以设置,比如Label16.Text = string.Format("{0:yyyyMMdd}",dt);

获得ip和mac地址

Code

using System.Runtime.InteropServices;

[DllImport("Iphlpapi.dll")]

    private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);

    [DllImport("Ws2_32.dll")]

    private static extern Int32 inet_addr(string ip);

    protected void Page_Load(object sender, EventArgs e)

    {

        

        // 在此处放置用户代码以初始化页面

        try

        {

            string userip = Request.UserHostAddress;

            string strClientIP = Request.UserHostAddress.ToString().Trim();

            Int32 ldest = inet_addr(strClientIP); //目的地的ip 

            Int32 lhost = inet_addr("");   //本地服务器的ip 

            Int64 macinfo = new Int64();

            Int32 len = 6;

            int res = SendARP(ldest, 0, ref macinfo, ref len);

            string mac_src = macinfo.ToString("X");

            if (mac_src == "0")

            {

                if (userip == "127.0.0.1")

                    Response.Write("正在访问Localhost!");

                else

                    Response.Write("欢迎来自IP为" + userip + "的朋友！" + "<br>");

                return;

            }

            while (mac_src.Length < 12)

            {

                mac_src = mac_src.Insert(0, "0");

            }

            string mac_dest = "";

            for (int i = 0; i < 11; i++)

            {

                if (0 == (i % 2))

                {

                    if (i == 10)

                    {

                        mac_dest = mac_dest.Insert(0, mac_src.Substring(i, 2));

                    }

                    else

                    {

                        mac_dest = "-" + mac_dest.Insert(0, mac_src.Substring(i, 2));

                    }

                }

            }

            Response.Write("欢迎来自IP为" + userip + "<br>" + ",MAC地址为" + mac_dest + "的朋友！"

             + "<br>");

        }

        catch (Exception err)

        {

            Response.Write(err.Message);

        }

    }

    private string GetClientIP()

    {

        string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

        if (null == result || result == String.Empty)

        {

            result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

        } if (null == result || result == String.Empty)

        {

            result = HttpContext.Current.Request.UserHostAddress;

        }

        return result;

    }

调用Win32 Api函数，非托管DLL

Code

using System;

using System.Collections.Generic;

using System.Text;

using System.Runtime.InteropServices;

namespace NetMeeting.API

{

　　public class Win32

　　{

　　　　[DllImport("user32.dll", EntryPoint = "MessageBox", ExactSpelling = false)]

　　　　public static extern int MessageBox(int hWnd, string text, string caption, uint type);

　　}

}

//客户调用:

using System;

using NetMeeting.API;

class test

{

　　public static void Main(string[] agrs)

　　{

　　　　　　Win32.MessageBox(0,"hello ,this is a c# invoke win32 api","test",2);

　　}

}

生成高质量缩略图

Code

//方法1

public static Bitmap CreateThumbnail(Bitmap source, int thumbWi, int thumbHi, bool maintainAspect)

        {

            // return the source image if it's smaller than the designated thumbnail

            if (source.Width < thumbWi && source.Height < thumbHi) return source;

            System.Drawing.Bitmap ret = null;

            try

            {

                int wi, hi;

                wi = thumbWi;

                hi = thumbHi;

                if (maintainAspect)

                {

                    // maintain the aspect ratio despite the thumbnail size parameters

                    if (source.Width > source.Height)

                    {

                        wi = thumbWi;

                        hi = (int)(source.Height * ((decimal)thumbWi / source.Width));

                    }

                    else

                    {

                        hi = thumbHi;

                        wi = (int)(source.Width * ((decimal)thumbHi / source.Height));

                    }

                }

                // original code that creates lousy thumbnails

                // System.Drawing.Image ret = source.GetThumbnailImage(wi,hi,null,IntPtr.Zero);

                ret = new Bitmap(wi, hi);

                using (Graphics g = Graphics.FromImage(ret))

                {

                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

                    g.FillRectangle(Brushes.White, 0, 0, wi, hi);

                    g.DrawImage(source, 0, 0, wi, hi);

                }

            }

            catch

            {

                ret = null;

            }

            return ret;

        }

//调用

 using (Graphics g = Graphics.FromImage(ret))

                {

                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

                    g.FillRectangle(Brushes.White, 0, 0, wi, hi);

                    g.DrawImage(source, 0, 0, wi, hi);

                }

将文件保存到数据库中

Code

//保存文件到SQL Server数据库中

    private void FileToSql(string fileName,string tableName,string fieldName)

    {

        SqlConnection cn=new SqlConnection ();

        FileInfo fi=new FileInfo(fileName);

        FileStream fs=fi.OpenRead();

        byte[] bytes=new byte[fs.Length];

        fs.Read(bytes,0,Convert.ToInt32(fs.Length));

        SqlCommand cm=new SqlCommand();

        cm.Connection=cn;

        cm.CommandType=CommandType.Text;

        if(cn.State==0) cn.Open();

        cm.CommandText="insert into "+tableName+"("+fieldName+") values(@file)";

        SqlParameter spFile=new SqlParameter("@file",SqlDbType.Image);

        spFile.Value=bytes;

        cm.Parameters.Add(spFile);

        cm.ExecuteNonQuery();

    }

//保存文件到Access数据库中

    private void FileToAccess(string fileName,string tableName,string fieldName)

    {

        OleDbConnection cn=new OleDbConnection ();

        FileInfo fi=new FileInfo(fileName);

        FileStream fs=fi.OpenRead();

        byte[] bytes=new byte[fs.Length];

        fs.Read(bytes,0,Convert.ToInt32(fs.Length));

        OleDbCommand cm=new OleDbCommand();

        cm.Connection=cn;

        cm.CommandType=CommandType.Text;

        if(cn.State==0) cn.Open();

        cm.CommandText="insert into "+tableName+"("+fieldName+") values(@file)";

        OleDbParameter spFile=new OleDbParameter("@file",OleDbType.Binary);

        spFile.Value=bytes;

        cm.Parameters.Add(spFile);

        cm.ExecuteNonQuery();

    }

    //保存客户端文件到数据库,fl_name为上传控件

    private void FileToDataSourse(string mailid)

    {

        string ConnStr = "";

        string sql = "update t_mail set attachfilename=@attachfilename,attachfile=@attachfile where mailid=" + mailid;

        SqlCommand myCommand = new SqlCommand(sql, new SqlConnection(ConnStr));

        string path = fl_name.PostedFile.FileName;

        string filename = path.Substring(path.LastIndexOf("") + 1, path.Length - path.LastIndexOf("") - 1);

        myCommand.Parameters.Add("@attachfilename", SqlDbType.VarChar);

        myCommand.Parameters["@attachfilename"].Value = filename;

        myCommand.Parameters.Add("@attachfile", SqlDbType.Image);

        Stream fileStream = fl_name.PostedFile.InputStream;

        int intFileSize = fl_name.PostedFile.ContentLength;

        byte[] fileContent = new byte[intFileSize];

        int intStatus = fileStream.Read(fileContent, 0, intFileSize); //文件读取到fileContent数组中

        myCommand.Parameters["@attachfile"].Value = ((byte[])fileContent);

        fileStream.Close();

        myCommand.Connection.Open();

        myCommand.ExecuteNonQuery();

        myCommand.Connection.Close();

    }

将用户输入的字符串转换为可换行、替换Html编码、无危害数据库特殊字符、去掉首尾空白、的安全方便代码

Code

public static string ConvertStr(string inputString)

        {

            string retVal = inputString;

            retVal = retVal.Replace("&", "&amp;");

            retVal = retVal.Replace("/"", "&quot;");

            retVal = retVal.Replace("<", "&lt;");

            retVal = retVal.Replace(">", "&gt;");

            retVal = retVal.Replace(" ", "&nbsp;");

            retVal = retVal.Replace("  ", "&nbsp;&nbsp;");

            retVal = retVal.Replace("/t", "&nbsp;&nbsp;");

            retVal = retVal.Replace("/r", "<br>");

            return retVal;

        }

        private static string FetchURL(string strMessage)

        {

            string strPattern = @"(?<url>(http|ftp|mms|rstp|news|https)://(?:[/w-]+/.)+[/w-]+(?:/[/w-./?%&~=]*[^./s|,|/)|<|!])?)";

            string strReplace = "<a href=/"${url}/" target=_blank>${url}</a>";

            string strInput = strMessage;

            string strResult;

            strResult = Regex.Replace(strInput, strPattern, strReplace);

            strPattern = @"(?<!http://)(?<url>www/.(?:[/w-]+/.)+[/w-]+(?:/[/w-./?%&~=]*[^./s|,|/)|<|!])?)";

            strReplace = "<a href=/"http://${url}/" target=_blank>${url}</a>";

            strResult = Regex.Replace(strResult, strPattern, strReplace);

            return strResult;

        } 

        public string ToUrl(string inputString)

        {

            string retVal = inputString;

            retVal = ConvertStr(retVal);

            retVal = FetchURL(retVal);

            return retVal;

        }