简单的封装一个HTML 弹出对话框的空间

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;
 
namespace sjn
{
    /// <summary>
    ///MessageBox 的摘要说明
    /// </summary>
    public sealed class MessageBox : WebControl
    {
        private bool _show = false;
        private string _message = string.Empty;
        public void Show(string msg)
        {
            this._show = true;
            this._message = ToJSString(msg);
        }


        protected override void Render(HtmlTextWriter writer)
        {
            if (_show)
            {
                writer.Write("{0}", this._message);
            }

        }
        
        string ToJSString(string msg)
        {
            return " <script>alert('" + msg + "') </script>";

        }
    }
}