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 = 0; 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 = 0; 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 = 0; i < list.Items.Count; i++)
            {
                bool tag = false;
                for (int j = 0; 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(122);
            while (ret < 48 || (ret > 57 && ret < 65) || (ret > 90 && ret < 97))
            {
                ret = m_rnd.Next(122);
            }
            return (char)ret;
        }
        public static string getRandomString(int length)
        {
            StringBuilder sb = new StringBuilder(length);
            for (int i = 0; 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 == -1)    //不存在末尾标志位
            {
                return str;
            }
            else
            {
                return str.Remove(i, splitFlag.Length);
            }

        }