常见的类整理

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Drawing;
using System.Text.RegularExpressions;//regex
using System.Text;//Encoding
using System.Security;//登录验证
using System.IO;

/**//// <summary>
/// Summary description for config
/// </summary>
public class config
{
    构造函数#region 构造函数
    public config()
    {
        //
        // TODO: Add constructor logic here
        //
    }
    #endregion

    access建立连接#region access建立连接
    public static OleDbConnection createCon()
    {
        OleDbConnection con = new OleDbConnection(System.Configuration.ConfigurationManager.ConnectionStrings["creTableConnectionString"].ConnectionString);
        return con;
    }
    #endregion

    sqlserver2000建立连接#region sqlserver2000建立连接
    public static SqlConnection createSqlCon()
    {
        SqlConnection consql = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["creTableConnectionString"].ConnectionString);
        return consql;
    }
    #endregion

    过滤单引号#region 过滤单引号
        /**//// <summary>
        /// 过滤单引号 返回String
        /// </summary>
        /// <param name="Str"></param>
        /// <returns></returns>
        public static  string Chk39(string Str)
        {
            if ((Str=="")||(Str==null))
                Str = "";
            else
                Str = Str.Replace("'","'");
            return Str;            
        }
        #endregion

    反过滤单引号#region 反过滤单引号
        /**//// <summary>
        /// 反过滤单引号 Return String
        /// </summary>
        /// <param name="Str"></param>
        /// <returns></returns>
    public static string ReChk39(string Str)
        {
            Str = Str.Replace("'","'");
            return Str;
        }
        #endregion 

    判断用户是否登录#region   判断用户是否登录
    public static void sessionIS()//判断用户是否登陆
    {
        //System.Web.HttpResponse response = new System.Web.HttpContext.
        //System.Web.HttpResponse response = new System.Web.HttpContext.
        System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
        string sid = Convert.ToString(System.Web.HttpContext.Current.Session["USERID"]);
        string name = Convert.ToString(System.Web.HttpContext.Current.Session["USERNAME"]);
        if (name == null || name == "" || sid == null || sid == "")
        {
            response.Write("<script>window.parent.location.href='login.aspx';</script>");
            response.End();
        }

    }

    #endregion

    弹出JavaScript小窗口#region 弹出JavaScript小窗口

        /**//// <summary>
        /// 弹出JavaScript小窗口
        /// </summary>
        /// <param name="js">窗口信息</param>
        public static void Alert(string message)
        {
            
            string js = @"<Script language='JavaScript'>
                    alert('" + message + "');</Script>";
            HttpContext.Current.Response.Write(js);
           
        }
      #endregion

    弹出消息框并且转向到新的#region  弹出消息框并且转向到新的
        /**///// <summary>
        /// 弹出消息框并且转向到新的URL
        /// </summary>
        /// <param name="message">消息内容</param>
        /// <param name="toURL">连接地址</param>
        public static void AlertAndRedirect(string message, string toURL)
        {
            string js = "<script language=javascript>alert('{0}');window.location.replace('{1}')</script>";
            HttpContext.Current.Response.Write(string.Format(js, message, toURL));
           
        }

     #endregion
    
    回到历史页面#region 回到历史页面
        /**//**//**//// <summary>
        /// 回到历史页面
        /// </summary>
        /// <param name="value">-1/1</param>
        public static void GoHistory(int value)
        {
            string js = @"<Script language='JavaScript'>
                    history.go({0});  
                  </Script>";
            HttpContext.Current.Response.Write(string.Format(js, value));

        }
    #endregion

    关闭当前窗口#region  关闭当前窗口
        /**//**//**//// <summary>
        /// 关闭当前窗口
        /// </summary>
        public static void CloseWindow()
        {
            string js = @"<Script language='JavaScript'>
                    parent.opener=null;window.close();  
                  </Script>";
            HttpContext.Current.Response.Write(js);
            HttpContext.Current.Response.End();
            
        }
   #endregion

    刷新父窗口#region  刷新父窗口
        /**//**//**//// <summary>
        /// 刷新父窗口
        /// </summary>
        public static void RefreshParent(string url)
        {
            string js = @"<Script language='JavaScript'>
                    window.opener.location.href='"+url+"';window.close();</Script>";
            HttpContext.Current.Response.Write(js);
            
        }
   #endregion
    
    刷新打开窗口#region  刷新打开窗口
       
        /**//**//**//// <summary>
        /// 刷新打开窗口
        /// </summary>
        public static void RefreshOpener()
        {
            string js = @"<Script language='JavaScript'>
                    windows.opener.location.reload();
                  </Script>";
            HttpContext.Current.Response.Write(js);
           
        }

   #endregion

    打开指定大小的新窗体#region  打开指定大小的新窗体
        /**//**//**//// <summary>
        /// 打开指定大小的新窗体
        /// </summary>
        /// <param name="url">地址</param>
        /// <param name="width">宽</param>
        /// <param name="heigth">高</param>
        /// <param name="top">头位置</param>
        /// <param name="left">左位置</param>
        public static void OpenWebFormSize(string url, int width,int heigth,int top,int left)
        {
            string js = @"<Script language='JavaScript'>window.open('" + url + @"','','height=" + heigth + ",width=" + width + ",top="+top+",left="+left+",location=no,menubar=no,resizable=yes,scrollbars=yes,status=yes,titlebar=no,toolbar=no,directories=no');</Script>";

            HttpContext.Current.Response.Write(js);

        }
      #endregion
  
    转向Url制定的页面#region 转向Url制定的页面
        /**//**//**//// <summary>
        /// 转向Url制定的页面
        /// </summary>
        /// <param name="url">连接地址</param>
        public static void JavaScriptLocationHref(string url)
        {
            string js = @"<Script language='JavaScript'>
                    window.location.replace('{0}');
                  </Script>";
            js = string.Format(js, url);
            HttpContext.Current.Response.Write(js);
            
        }
     #endregion
      
    打开指定大小位置的模式对话框#region 打开指定大小位置的模式对话框
        /**//**//**//// <summary>
        /// 打开指定大小位置的模式对话框
        /// </summary>
        /// <param name="webFormUrl">连接地址</param>
        /// <param name="width">宽</param>
        /// <param name="height">高</param>
        /// <param name="top">距离上位置</param>
        /// <param name="left">距离左位置</param>
        public static void ShowModalDialogWindow(string webFormUrl, int width, int height, int top, int left)
        {
            string features = "dialogWidth:" + width.ToString() + "px"
                + ";dialogHeight:" + height.ToString() + "px"
                + ";dialogLeft:" + left.ToString() + "px"
                + ";dialogTop:" + top.ToString() + "px"
                + ";center:yes;help=no;resizable:no;status:no;scroll=yes";
            ShowModalDialogWindow(webFormUrl, features);
        }
        public static void ShowModalDialogWindow(string webFormUrl, string features)
        {
            string js = ShowModalDialogJavascript(webFormUrl, features);
            HttpContext.Current.Response.Write(js);
        }
        public static string ShowModalDialogJavascript(string webFormUrl, string features)
        {
            string js = @"<script language=javascript>                            
                            showModalDialog('" + webFormUrl + "','','" + features + "');</script>";
            return js;
           
        }
      
    #endregion
    
    过滤输入的信息#region 过滤输入的信息
        /**//// <summary>
       /// 过滤输入的信息
       /// </summary>
       /// <param name="text">要过滤的字符串</param>
       /// <param name="maxLength">最大长度</param>
       /// <returns></returns>
       public static string InputText(string text, int maxLength)
       {
           text = text.Trim();
           if (string.IsNullOrEmpty(text))
               return string.Empty;
           if (text.Length > maxLength)
               text = text.Substring(0, maxLength);
           text = Regex.Replace(text, "[\\s]{2,}", " ");    //two or more spaces
           text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n");    //<br>
           text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " ");    //&nbsp;
           text = Regex.Replace(text, "<(.|\\n)*?>", string.Empty);    //any other tags
           text = text.Replace("'", "''");
           return text;
       
       } 
       #endregion

    截取字符串函数#region  截取字符串函数
       /**//// <summary>
       /// 截取字符串函数
       /// </summary>
       /// <param name="str">所要截取的字符串</param>
       /// <param name="num">截取字符串的长度</param>
       /// <returns></returns>
       public static  string GetSubString(string str, int num)
       {
           return (str.Length > num) ? str.Substring(0, num) + "" : str;
           
       }
       #endregion

    特殊字符的转换#region  特殊字符的转换
       public static string Encode(string str)
       {
           str = str.Replace("'", "＇");
           str = str.Replace("\"", "&quot;");
           str = str.Replace("<", "&lt;");
           str = str.Replace(">", "&gt;");
           return str;
       }

       public static string Decode(string str)
       {
           str = str.Replace("&gt;", ">");
           str = str.Replace("&lt;", "<");
           str = str.Replace("&nbsp;", " ");
           str = str.Replace("&quot;", "\"");
           return str;

       }
       #endregion

    字符传的转换 用在查询 登陆时 防止恶意的盗取密码#region 字符传的转换 用在查询 登陆时 防止恶意的盗取密码
       public static string TBCode(string strtb)
       {
           strtb = strtb.Replace("!", "");
           strtb = strtb.Replace("@", "");
           strtb = strtb.Replace("#", "");
           strtb = strtb.Replace("$", "");
           strtb = strtb.Replace("%", "");
           strtb = strtb.Replace("^", "");
           strtb = strtb.Replace("&", "");
           strtb = strtb.Replace("*", "");
           strtb = strtb.Replace("(", "");
           strtb = strtb.Replace(")", "");
           strtb = strtb.Replace("_", "");
           strtb = strtb.Replace("+", "");
           strtb = strtb.Replace("|", "");
           strtb = strtb.Replace("?", "");
           strtb = strtb.Replace("/", "");
           strtb = strtb.Replace(".", "");
           strtb = strtb.Replace(">", "");
           strtb = strtb.Replace("<", "");
           strtb = strtb.Replace("{", "");
           strtb = strtb.Replace("}", "");
           strtb = strtb.Replace("[", "");
           strtb = strtb.Replace("]", "");
           strtb = strtb.Replace("-", "");
           strtb = strtb.Replace("=", "");
           strtb = strtb.Replace(",", "");
           return strtb;

       }
       #endregion

    获取汉字第一个拼音#region 获取汉字第一个拼音
       /**//**/
       /**//// <summary>
       /// 获取汉字第一个拼音
       /// </summary>
       /// <param name="input"></param>
       /// <returns></returns>
       static public string getSpells(string input)
       {
           int len = input.Length;
           string reVal = "";
           for (int i = 0; i < len; i++)
           {
               reVal += getSpell(input.Substring(i, 1));
           }
           return reVal;
       }
       static public string getSpell(string cn)
       {
           byte[] arrCN = Encoding.Default.GetBytes(cn);
           if (arrCN.Length > 1)
           {
               int area = (short)arrCN[0];
               int pos = (short)arrCN[1];
               int code = (area << 8) + pos;
               int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };
               for (int i = 0; i < 26; i++)
               {
                   int max = 55290;
                   if (i != 25) max = areacode[i + 1];
                   if (areacode[i] <= code && code < max)
                   {
                       return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
                   }
               }
               return "?";
           }
           else return cn;

       }
       #endregion

    半角转全角#region 半角转全角
       /**//**/
       /**//// <summary>
       /// 半角转全角
       /// </summary>
       /// <param name="BJstr"></param>
       /// <returns></returns>
       static public string GetQuanJiao(string BJstr)
       {
           char[] c = BJstr.ToCharArray();
           for (int i = 0; i < c.Length; i++)
           {
               byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
               if (b.Length == 2)
               {
                   if (b[1] == 0)
                   {
                       b[0] = (byte)(b[0] - 32);
                       b[1] = 255;
                       c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
                   }
               }
           }

           string strNew = new string(c);
           return strNew;


       }
       #endregion

    全角转半角#region  全角转半角
       /**//**/
       /**//// <summary>
       /// 全角转半角
       /// </summary>
       /// <param name="QJstr"></param>
       /// <returns></returns>
       static public string GetBanJiao(string QJstr)
       {
           char[] c = QJstr.ToCharArray();
           for (int i = 0; i < c.Length; i++)
           {
               byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
               if (b.Length == 2)
               {
                   if (b[1] == 255)
                   {
                       b[0] = (byte)(b[0] + 32);
                       b[1] = 0;
                       c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
                   }
               }
           }
           string strNew = new string(c);
           return strNew;

       }
       #endregion

    生成随机数#region  生成随机数
       /**//**/
       /**//// <summary>
       /// 生成随机数
       /// </summary>
       /// <returns></returns>
       static private string GenerateCheckCode()
       {
           int number;
           char code;
           string checkCode = String.Empty;

           System.Random random = new Random();

           for (int i = 0; i < 5; i++)
           {
               number = random.Next();

               if (number % 2 == 0)
                   code = (char)('0' + (char)(number % 10));
               else
                   code = (char)('A' + (char)(number % 26));

               checkCode += code.ToString();
           }

           System.Web.HttpContext.Current.Response.Cookies.Add(new HttpCookie("CheckCode", checkCode));

           return checkCode;

       }
       #endregion

    生成验证码图片生成验证码图片#region  生成验证码图片生成验证码图片
       /**//// <summary>
       /// 生成验证码图片
       /// </summary>
       public static void CreateCheckCodeImage()
       {
           string checkCode = GenerateCheckCode();
           System.Web.HttpContext.Current.Session["username"] = checkCode ;
           //Console.Write(checkCode);

           if (checkCode == null || checkCode.Trim() == String.Empty)
               return;

           System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22);
           Graphics g = Graphics.FromImage(image);

           try
           {
               //生成随机生成器
               Random random = new Random();

               //清空图片背景色
               g.Clear(Color.White);

               //画图片的背景噪音线
               for (int i = 0; i < 25; i++)
               {
                   int x1 = random.Next(image.Width);
                   int x2 = random.Next(image.Width);
                   int y1 = random.Next(image.Height);
                   int y2 = random.Next(image.Height);

                   g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
               }

               Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
               System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
               g.DrawString(checkCode, font, brush, 2, 2);

               //画图片的前景噪音点
               for (int i = 0; i < 100; i++)
               {
                   int x = random.Next(image.Width);
                   int y = random.Next(image.Height);

                   image.SetPixel(x, y, Color.FromArgb(random.Next()));
               }

               //画图片的边框线
               g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);

               System.IO.MemoryStream ms = new System.IO.MemoryStream();
               image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
               HttpContext.Current.Response.ClearContent();
               HttpContext.Current.Response.ContentType = "image/Gif";
               HttpContext.Current.Response.BinaryWrite(ms.ToArray());
           }
           finally
           {
               g.Dispose();
               image.Dispose();
           }

       }
       #endregion

    获取文本框中输入内容#region  获取文本框中输入内容
       /**//**/
       /**//// <summary>
       /// 获取文本框中输入内容
       /// </summary>
       /// <param name="ctrl">TextBox控件ID</param>
       /// <returns></returns>
       static public string GetText(TextBox ctrl)
       {
           return ctrl.Text.Trim().Replace("'", "\"");

       }

       #endregion

    清除文本框内容#region  清除文本框内容
       /**//**/
       /**//// <summary>
       /// 清除文本框内容
       /// </summary>
       /// <param name="list">TextBox控件数组</param>
       static public void ClearText(TextBox[] list)
       {
           foreach (TextBox ctrl in list)
               ctrl.Text = null;

       }
       #endregion

    加密的类型#region 加密的类型
       /**//**/
       /**//// <summary>
       /// 加密的类型
       /// </summary>
       public enum PasswordType
       {
           SHA1,
           MD5
       }
       #endregion

    字符串加密#region  字符串加密
       /**//// <summary>
       /// 字符串加密
       /// </summary>
       /// <param name="PasswordString">要加密的字符串</param>
       /// <param name="PasswordFormat">要加密的类别</param>
       /// <returns></returns>
       static public string EncryptPassword(string PasswordString, string PasswordFormat)
       {
           switch (PasswordFormat)
           {
               case "SHA1":
                   {
                       PasswordString = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1");
                       break;
                   }
               case "MD5":
                   {
                       PasswordString = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "MD5");
                       break;
                   }
               default:
                   {
                       // passWord = string.Empty;
                       break;
                   }
           }
           return PasswordString;

       }
       #endregion
}