How to make one particular control as Sender of a event?

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C#

private void EnterPressed( object sender, KeyEventArgs e )
        {
            if ( e.KeyCode == Keys.Enter )
            {
                if ( this.SignButton.Enabled == true &&
                   ( sender is TextBox )
                   )
                {
                    this.SignButton_Click( sender, e );
                } // if
            } // if
        }

My Form consists of many TextBox Controls, how it will distinguish between the sender.

If i pass a particular textbox name, it is throwing error as "Is a field but used as type"

Posted 7-Oct-15 23:34pm

Reddy1111

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Shreyas Tg 8-Oct-15 5:49am

You should pass the ID right?

BillWoodruff 8-Oct-15 22:42pm

Does each TextBox have a different Button "associated" with it ?

So there might be 'TextBox5 and a Button 'Button5 which you will want to test the 'Enabled state ?

Is this a calculator project ?

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Sreekanth Mothukuru · Answer 1 · 2015-10-07T23:52:00

All you need to do here is to type cast the sender object to a TextBox Control and check to see is the control Id. Something like this..

C#

TextBox ctrl = (TextBox) sender;

if (ctrl != null)
{
// Do something
// Check for condition based on control Id
if (ctrl.Id.equals("txt1"))
{
  //do some thing
}
else if (ctrl.Id.equals("txt2")
{
 //  do something else..
}
}