OnKeyUp event in ASP.Net

How about the text entered by you in the textbox (ASP.NET) should be postback and the every entered char should be read in Code Behind class.\

It might be used for look up instantaneously in DB.Table.

This is done by calling the OnKeyUp event.

Sample code snippet.

   protected void Page_Load(object sender, EventArgs e)  
   {     
     TextBox1.Attributes.  
             Add("onkeyup",Page.  
             ClientScript.  
             GetPostBackEventReference(TextBox1, ""));      
     Response.Write(TextBox1.Text);  
   }