how do I disable Button asp.net

Question

How can I disable or enable button in asp.net? I want to disable button after click to prevent double click. I am trying to disable my Login button after clicking on it.

Answer 1

write a java-script function which checks the user name and password.
If they are not blank the disable the button.
But if you disable the button and there is a postback. And after the postback still it will be enable.
So Idea is

1. Create a java-script function.
2. validate user-name and password
3. if they are valid
4. disable the button (javascript).
5. Add ClientIdMode="Static" to your to prevent .NET from mangling the name.

--edit

Your java-script code

function btn_disable
{
   //check for user name and password
   // if filled
   document.getElementById("btn").disabled=true;

}