binded textBox update

Question

I am Using a Textbox and a button for submiting textbox text , the button should be unavailable if there is No text , but , the textbox "Updates" her Binded property (whitch used by buttun can execute comman ) after it lost focus , and I want the text box to update after each keystroke ,
I know there is a property that can solve my problem I cant remmember how it's called

thank you ...

Answer 1

this will also be helpful https://technet.microsoft.com/en-us/library/ee332526.aspx

Answer 2

This link will be helpful for you:

 

http://stackoverflow.com/questions/20661764/execute-powershell-script-from-perl-script