添加一个类：把下面的文件放在类中就可以了。
using System;
using System.Web;
using System.Data;
using System.Data.SqlClient;
public class MessageBox
{
public MessageBox()
{
}
/// <summary>
/// 警告框
/// </summary>
/// <param name="_Msg">警告字串</param>
/// <returns>警告框JS</returns>
public void MsgBox(string _Msg)
{
string StrScript;
StrScript = ("<script language=javascript>");
StrScript += ("alert('" + _Msg + "');");
StrScript += ("</script>");
System.Web.HttpContext.Current.Response.Write(StrScript);
}
/// <summary>
/// 一个含有“确定”、“取消”的警告框
/// </summary>
/// <param name="_Msg">警告字串</param>
/// <param name="URL">“确定”以后要转到预设网址</param>
/// <returns>警告框JS</returns>
&
