Validating multiple textboxes using errorprovider

Question

I have 10 textboxes, now i want to check that none of them are empty when a button is clicked. My code is :

 if (TextBox1.Text == \"\")
 {
    errorProvider1.Se         


        

Answer 1

Yes, there is.

First, you need to obtain all the text boxes in form of a sequence, for instance like this:

var boxes = Controls.OfType(); 

Then, you can iterate over them, and set the error accordingly:

foreach (var box in boxes)
{
    if (string.IsNullOrWhiteSpace(box.Text))
    {
        errorProvider1.SetError(box, "Please fill the required field");
    }
}

I would recommend using string.IsNullOrWhiteSpace instead of x == "" or + string.IsNullOrEmpty to mark text boxes filled with spaces, tabs and the like with an error.