Validating source of data in textBox

[Angel]

How can I validate the source of the data in a textbox? In my program, the
text in textboxY can be changed by the user typing in data or by the user
double-clicking a datagrid (which will copy the data to the textbox). I want
to disable a button if the user enters data manually (not when he/she
double-clicks on grid). How can I distinguish from those two? I wanted to
use TextChanged but they both fire that trigger.

Thank you,
Angel Monson

[Charlie Williams]

You can use KeyDown in the TextBox.

[Sherif ElMetainy]

Hello

define 2 boolean flags
private bool inDataGridDblClick;
private bool changedByUser;

in the datagrid dbl click event.

inDataGridDblClick = true;
try
{
myTextBox.Text = ......
}
finally
{
inDataGridDblClick = false;
}

then in the TextBox TextChanged event handler

changedByUser = !inDataGridDblClick;
Hope this helps

Best regards,
Sherif

"Angel" <an**********@yahoo.com> wrote in message
news:eM**************@TK2MSFTNGP12.phx.gbl...

How can I validate the source of the data in a textbox? In my program, the
text in textboxY can be changed by the user typing in data or by the user
double-clicking a datagrid (which will copy the data to the textbox). I want to disable a button if the user enters data manually (not when he/she
double-clicks on grid). How can I distinguish from those two? I wanted to
use TextChanged but they both fire that trigger.

Thank you,
Angel Monson