Text Box input validation

Question

HI,

I am developing a program that receives input data from many textboxes. This is fine but I need to validate the data immediately the user leaves text box1  and before he /she goes to text box2 etc.

I want to validate the data immediately instead of waiting until the user clicks a button.

How can I do this?

Karlap

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Karl A Phelan

Answer 1

What are you developing: Web, WPF, Silverlight, WinForms?

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Answer 2

Hi ErikEK,

It is a VB WinForms development.

Karlap

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Karl A Phelan

Answer 3

Hi Karlap,

 You can handle this in TextBox Validating event handler, see http://msdn.microsoft.com/en-us/library/system.windows.forms.control.validating.aspx.

Best Regards,

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Bob Wu
MSDN Community Support | Feedback to us
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Answer 4

Hi Karl,

Since this issue is related to Windows Forms, I will move this thread to Windows Forms forum. Sometime delay might be expected from the job transferring. Your patience is greatly appreciated. 

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Allen Li
TechNet Community Support