ASP.NET一些公共方法commTools

 using System;
 using System.Data;
 using System.Configuration;
 using System.Web;
 using System.Web.Security;
 using System.Web.UI;
 using System.Web.UI.HtmlControls;
 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
 using System.Collections;
 using System.Security.Cryptography;
 using System.Text;
 using System.IO;
 using System.Collections.Generic;
 using System.Text.RegularExpressions;
 /// <summary>
 ///commTools 的摘要说明
 /// </summary>
 namespace Intelligent.Common
 {
     public class commTools
     {
         public commTools()
         {

         }
         //提示信息
         public static void alert(TemplateControl target, string msg)
         {
             string scriptString = "alert('" + msg + "')";
             target.Page.ClientScript.RegisterClientScriptBlock(typeof(TemplateControl), DateTime.Now.ToString().Replace(":", " "), scriptString, true);
         }
         //错误页面
         public static void toErrorPage(string msg)
         {
             HttpContext.Current.Server.Transfer("~/Error.aspx?msg="+msg);
         }
         //获取对应参数的值，如果参数不合法则跳转到错误页面
         public static string getQueryString(string key)
         {
             if (HttpContext.Current.Request.QueryString[key] != null)
             {
                 string value = HttpContext.Current.Request.QueryString[key].ToString();
                 //可以根据key的不同，对值的类型和范围再进行判断和处理
                 return value;
             }
             else
                 toErrorPage("参数无效");
             return null;
         }
         //根据某个值让RadioButtonList某项被选中
         public static void setRadioButtonListByValue(RadioButtonList list, string value)
         {
             for (int i = ; i < list.Items.Count; i++)
             {
                 if (list.Items[i].Value == value)
                     list.Items[i].Selected = true;
                 else
                     list.Items[i].Selected = false;
             }
         }
         //根据某个值让DropDownList某项被选中
         public static void setDropDownListByValue(DropDownList list, string value)
         {
             for (int i = ; i < list.Items.Count; i++)
             {
                 if (list.Items[i].Value == value)
                     list.Items[i].Selected = true;
                 else
                     list.Items[i].Selected = false;
             }
         }
         //根据传的集合，让CheckBoxList多项被选中
         public static void SetCheckBoxListByList(CheckBoxList list,List<string> value)
         {
             for (int i = ; i < list.Items.Count; i++)
             {
                 bool tag = false;
                 for (int j = ; j < value.Count; j++)
                 {
                     if (list.Items[i].Value == value[j])
                     {
                         tag = true;
                         break;
                     }
                 }
                 list.Items[i].Selected = tag;
             }
         }
         //把一个字符串转换成对应的MD5
         public static string toMD5(string str)
         {
             return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "md5");
         }

         private static Random m_rnd = new Random();
         private static char getRandomChar()
         {
             int ret = m_rnd.Next();
             while (ret <  || (ret >  && ret < ) || (ret >  && ret < ))
             {
                 ret = m_rnd.Next();
             }
             return (char)ret;
         }
         public static string getRandomString(int length)
         {
             StringBuilder sb = new StringBuilder(length);
             for (int i = ; i < length; i++)
             {
                 sb.Append(getRandomChar());
             }
             return sb.ToString();
         }

         public static bool SendMail(string StrTo, string StrBody, string strSubject)
         {
             return false;
         }
         /// <summary>
         /// 根据传进来的分割符，以及字符串将字符串分割
         /// </summary>
         /// <param name="str">需要分割的字符串</param>
         /// <param name="spiltChar">分隔符</param>
         /// <returns>返回分割好的字符串数组</returns>
         public static string[] StringSpilt(string str, string spiltChar)
         {
             Regex regex = new Regex(spiltChar);
             string[] strArr = regex.Split(str);
             return strArr;
         }

         /// <summary>
         /// 去除字符串的末尾标志符
         /// </summary>
         /// <param name="str">字符串</param>
         /// <param name="splitFlag">末尾标识符</param>
         /// <returns>返回结果字符串</returns>
         public static string RemoveLastSplitFlag(string str, string splitFlag)
         {
             int i = str.LastIndexOf(splitFlag);
             if (i == -)    //不存在末尾标志位
             {
                 return str;
             }
             else
             {
                 return str.Remove(i, splitFlag.Length);
             }

         }