what is the alternate event of Textbox.KeyDown of Winform in WebForm in C# asp.net?

Question

In winfrom applications i can have

textbox1.keydown 

event, but i want to achieve same thing in webform (asp.net), so how can i do that? I need

Answer 1

In web application there are something you do in the client and some in the server.

I don't now what you what achieve, but i think that in most cases rise the keydown event will be in the client.

SO, there is a great library called JQUERY (javascript) that helps you do this kind of staff.

see the documentation of KEYDOWN

I wrote an example for you

HTML Code

​

JQUERY (javascript) Code

$(document).ready(function() {

$("#txtBox").keydown(function() {   
   $.ajax({
   url: "URLTOTHEFUNCTIONINTHESERVER",
   type: 'GET',
   cache: false
   }).done(function( html ) {
    alert(html);
    });
});

});​

OK to explain the code

• The first line i am checking if the document is ready
• then i caching the keydown event and firing a function
• Inside the function i am calling to an ajex function of jquery, inside the function you will see a "done" functio nand a var called html which hold the content that returns from the server