Question about checking input

[Gidi]

hi,

how can i check that the input that the user inserts is of the type i need.
for expample if i want the user to insert only numbers how can i check that he hasn't insert letters or something else?

i hope that there is a better way then to check char by char...

thanks

[Mohamoss]

Hi
Is this simple validation is all what you want to do, then you don't have
to check it char by char. Try to parse the whole string on your textbox as
a number ,and put this parsing part in a try block . if the parsing fails ,
you know the what was entered is not a correct number format and you can
prompt the user for that . Here you are an example of parsing the text
property of a textbox as integer.
try
{
int k = Int32.Parse(thi s.textBox1.Text );
}
catch (Exception exp)
{
MessageBox.Show (" you didn't enter a valid number " + exp.Message);
}
Hope this helps

Mohamed Mahfouz
MEA Developer Support Center
ITworx on behalf of Microsoft EMEA GTSC