TextBox Validation

[eihabisaac]

Hi,

i'm working with c# and MySQL, and i need to validate some textboxes to ensure valid data is inserted to the database.

i did some coding and it works but i need the easiest and the right way to do that and if there is a TOOLBOX for validation that will be great.

private void textBox1_Validating(object sender, CancelEventArgs e)
{
if (String.IsNullOrEmpty(textBox1.Text))
e.Cancel = true;
}

not just for null value, i need to make sure only numbers are inserted.

thanks in advance for any help

[tlhintoq]

TIP: When you are writing your question, there is a button on the tool bar that wraps the [code] tags around your copy/pasted code. It helps a bunch. Its the button with a '#' on it. More on tags. They're cool. Check'em out.

Option A: Change the Textbox for a NumericUpDown

Option B: Create a custom Textbox, inheriting from Textbox that filters on the Keypress event and only allows numbers to be entered.

Option C: Parse your text in a loop character by character to make sure each one is a number.

Option D: Regular Expressions (RegEx)

[orked]

you can make validation on text box from toolbox ,choose validation if you want write number only choose regular expression validator and write in its properties
(validation expression)this expression(\d{numbers of numbers you want to enter it })
if you refuse null value this expression make what you want.
Good luck.