Need help! I need to add lead zeros to a textbox

[Teep]

I have a simple text box called txtrefnum, if the user enters a number
length less than 9 characters long than I need to have lead zeros
added to it. Does anyone know how to do this? I couldn't find anything
online on the subject...

<asp:TextBox id="txtRefNum" runat="server"></asp:TextBox>

I thought I could use a validator for the process and make the user
add the zeros, but of course that is a big no-no! Please help!!

Thanks!

 

[Martin Marinov]

Do you want to do it on clien side or server side ?

on server side it is simple :

If txtRefNum.Text.Length < 9 Then
Dim zeros as String = ""
Dim index as Integer = 0
For index = txtRefNum.Text.Length To 8
zeros &= "0"
Next
txtRefNum.Text = zeros & txtRefNum.Text
End If

Regards
Martin

 

[Larry Marburger]

No need to write your own Pad() method, there's a String.PadLeft()
method built into .NET. Check here for examples:

http://msdn.microsoft.com/library/d...f/html/frlrfsystemstringclasspadlefttopic.asp

That article demonstrates an easier / cleaner way to accomplish this
task. An example:

<snip>
string temp = txtRefNum.Text.PadLeft(9, '0');
</snip>

This should be what you're looking for, Teep.