Enable or disable the button

[VietView]

Hi, guys.

I have a gridpanel and a number field out of gridpanel, can I enable or disable the number field in server side by using ajax event when one row of gridpanel is selected?
When I disable a number field in HTML code, I try to use ajax event and recieve the error "Object reference not set to an instance of an object."
Plz, help me, thanks

[Vladimir]

*Hi,

I think you will need to post a simple example which shows how to reproduce the JavaScript error.

[geoffrey.mcgill]

Hi VietView,

You can disable any Coolite Toolkit form control by setting the .Disabled property to "true". Or, you can use the .Disable() Method.

Example

protected void Button1_Click(object sender, AjaxEventArgs e)
{
    this.NumberField1.Disable();
    
    // or set the .Disabled property
    this.NumberField1.Disabled = true;
}

Hope this helps.

[blahetal]

hi, how can I disable and enable a button with a client side jscript? I tried to do that jquery way

$("#button").attr({ disabled: "true" });

but the above code does not work. I've noticed that coolite generates buttons as html tables (to align graphic stuff) so maybe that's why the jquery approach does not work.

[geoffrey.mcgill]

Hi blahetal,

You just use the .setDisabled() JavaScript function, see*http://extjs.com/deploy/dev/docs/?cl...er=setDisabled


Example

Button1.setDisabled(true);