masked textbox control with error provider control

[buddyr]

Hello,
I have a texbox with error provider control:

if(textbox.text.length <=0)
{
     errorprovider1.seterror(textbox,"enter part number");
}
else
{
     errorprovider1.seterror(textbox, "");
 

Now when I use this code on masked textbox does not work- I am trying to change if statement to work
thank you

[tlhintoq]

Now when I use this code on masked textbox does not work

What do you mean by "does not work"? If it doesn't function then you should have an error/exception message.
Or is it working (no error) just not behaving as you thought it would?

It's simple enough to see *why* it does what it does/thinks what it thinks, and see if your assumptions are right.

• Put a breakpoint on line 1.
• When the code stops there, walk through line by line with F-10.
• Check the values of your assumptions.

Having the 'locals' and 'auto' pallets open will show you those variables and their values.

Hovering the mouse over a code segment such as textbox.text will show you it's value.

Your 'if' construct is centered on the assumption that the textbox.text will be empty: So confirm that. When it breaks on that line, hover your mouse over the textbox.text and see what its value really is. You might be surprised to find out that it isn't blank.

[buddyr]

your right i did not communicate problem.
statement works - just not giving results I want

your right its not blank

Now I am going to spend some more time -try to figure it out right
thank you

[buddyr]

if (maskedTextBox1.Text.Length < 14)
            {  
              errorProvider1.SetError(maskedTextBox1, "You must enter a valid telephone number");
            }
 

this works so for now I am going to use it -thanks for help-