Simple Text box validation

[insomnia]

Hi there a quick simple question, i need to be able to validate a textbox

The user must enter a number within the range 0001 to 9999 only.

And in the 4 number format XXXX , e.g. if they enter the number 11 i need it to be formated 0011.

thanks

[balabaster]

Hi there a quick simple question, i need to be able to validate a textbox

The user must enter a number within the range 0001 to 9999 only.

And in the 4 number format XXXX , e.g. if they enter the number 11 i need it to be formated 0011.

thanks

Is this on a Windows form or on a Web page? If it's on a web page, do you need client side validation or server side validation?

[insomnia]

Is this on a Windows form or on a Web page? If it's on a web page, do you need client side validation or server side validation?

Sorry balabaster, it is on a vb.net form, i simply need to validate the data a user enters in to one of the fields on a form.

the format must be numerical and 4 digits long.

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and how could i disable a "space" being used

eg. if the user types "two apples" rather than "twoapples"

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cheers

[Shashi Sadasivan]

vb.net form? Will presume that it is a windows application.

You can use regex to do that
this expression ^[0-9]{4}$ will limit the user to enter only digits into the textbox and that is limited to 4 digits in total.

[insomnia]

Thanks all sorted :-)

I used a combination of :

If Not IsNumeric(Textbox.Text) Or Textbox.Text = "" 

And :

Textbox.Text = Format(Convert.ToInt32(Textbox.Text), "0000")

in the end to achieve my goal.

cheers again

[todashah]

Hi there a quick simple question, i need to be able to validate a textbox

The user must enter a number within the range 0001 to 9999 only.

And in the 4 number format XXXX , e.g. if they enter the number 11 i need it to be formated 0011.

thanks

To perform this kind of validation in C# write down following code in Leave event of textbox.

int l = textBox1.Text.Length;
if (l != 4 || l < 0 || l > 9999)
MessageBox.Show("Invalid No");
else
MessageBox.Show("Valid No");

Make necessary changes in this code so it is execute in VB.net..
Bye...Enjoy Coding