Question

i have a textbox of label “NAME” i need to disable the a button(that is next Button) as long as this textbox is empty.
this is my appproach

private void planName_TextChanged(object sender, TextChangedEventArgs e)
    {
        if (planName.Text.Length != 0)
        {
            parent.EnableOrDisableNextButton("enable") ;
        }
    }

this is working for first time but if user again clear the name then next button remain enable s or if he cut the whole field.
how to get this?

Answer 1

You need to disable it with else:

        private void planName_TextChanged(object sender, TextChangedEventArgs e) 
        { 
            if (planName.Text.Length != 0) 
            { 
                parent.EnableOrDisableNextButton("enable"); 
            } 
            else
                parent.EnableOrDisableNextButton("disable");
        }