ASP.NET 弹出提示框所有种类

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>
      &