怎么在cs文件中弹出提示框？

如何在cs文件中弹出提示框？？？
我是说.cs的文件，不是.aspx.cs的文件，在这里面Response不好用，请问怎样才能弹出提示框呢

[解决办法]
System.Web.HttpContext.Current.Response.Write("<script>alert('sss');</script>");
[解决办法]

C# code

HttpContext.Current.Response.Write("<script>alert('asdaksdjlaksd');location.href=location.href</script>");//要这样子的不?
[解决办法]
给你个类~

C# code
using System;using System.Text;public class MessageBox{    private MessageBox()    {    }    /// <summary>    /// 显示消息提示对话框    /// </summary>    /// <param name="page">当前页面指针，一般为this</param>    /// <param name="msg">提示信息</param>    public static void Show(System.Web.UI.Page page, string msg)    {        page.RegisterStartupScript("message", "<script language='javascript' defer>alert('" + msg.ToString() + "');</script>");    }    /// <summary>    /// 控件点击 消息确认提示框    /// </summary>    /// <param name="page">当前页面指针，一般为this</param>    /// <param name="msg">提示信息</param>    public static void ShowConfirm(System.Web.UI.WebControls.WebControl Control, string msg)    {        //Control.Attributes.Add("onClick","if (!window.confirm('"+msg+"')){return false;}");        Control.Attributes.Add("onclick", "return confirm('" + msg + "');");    }    /// <summary>    /// 显示消息提示对话框，并进行页面跳转    /// </summary>    /// <param name="page">当前页面指针，一般为this</param>    /// <param name="msg">提示信息</param>    /// <param name="url">跳转的目标URL</param>    public static void ShowAndRedirect(System.Web.UI.Page page, string msg, string url)    {        StringBuilder Builder = new StringBuilder();        Builder.Append("<script language='javascript' defer>");        Builder.AppendFormat("alert('{0}');", msg);        Builder.AppendFormat("location.href='{0}'", url);        Builder.Append("</script>");        page.RegisterStartupScript("message", Builder.ToString());    }    public static void ShowAndRedirect(System.Web.UI.Page page, string msg, string url, bool top)    {        StringBuilder Builder = new StringBuilder();        Builder.Append("<script language='javascript' defer>");        Builder.AppendFormat("alert('{0}');", msg);        if (top == true)        {            Builder.AppendFormat("top.location.href='{0}'", url);        }        else        {            Builder.AppendFormat("location.href='{0}'", url);        }        Builder.Append("</script>");        page.RegisterStartupScript("message", Builder.ToString());    }    /// <summary>    /// 输出自定义脚本信息    /// </summary>    /// <param name="page">当前页面指针，一般为this</param>    /// <param name="script">输出脚本</param>    public static void ResponseScript(System.Web.UI.Page page, string script)    {        page.RegisterStartupScript("message", "<script language='javascript' defer>" + script + "</script>");    }}
[解决办法]
那是因为类里面缺少引用 using System.Web.HttpContext.Current；

或者直接这么写
System.Web.HttpContext.Current.Response.Write("<script>alert('提示');</script>");


[解决办法]
探讨

System.Web.HttpContext.Current.Response.Write(" <script>alert('sss'); </script>");