using System.Web.UI;

 1 public void Alert(string str_Message)
 2         {
 3             ClientScriptManager scriptManager =((Page)System.Web.HttpContext.Current.Handler).ClientScript;
 4             scriptManager.RegisterStartupScript(typeof(string), "", "alert('" + str_Message + "');", true);
 5         }
 6  public void Alert(string str_Message, string redirect)
 7         {
 8             ClientScriptManager scriptManager =((Page)System.Web.HttpContext.Current.Handler).ClientScript;
 9             scriptManager.RegisterStartupScript(typeof(string), "", "alert('" + str_Message + "');self.location='"+redirect+"'", true);
10         }
11 
12