Question

I have windows application in c#

with a form with 7 text box that i want to check (and more controls in the form)

i want to check all this 7 text box , that the user enter in data , and this is a number

all this text box start with the same name

How can i do it ?

thanks.

i start to write something like that but i am stack

     foreach (TextBox box in this.Controls.OfType<TextBox>()
.Where(tb => tb.Text.StartsWith('tbwin')))

Answer 1

foreach (TextBox box in this.Controls.OfType<TextBox>()
       .Where(tb => tb.Name.StartsWith("tbwin")))
{
    int result;
    if(!int.TryParse(box.Text, out result))
    {
         //Not OK. Inform user
         MessageBox.Show("You need to write a valid number in " + box.Name);
    } 
}