How to validate textbox in C#

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Hi All,

I have five textboxes that i want users to fill before clicking the save button.

I need a code that will tell them if any of those textbox are empty.

Posted 25-Apr-10 22:13pm

Adesina Mark

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Christian Graus · Answer 1 · 2010-04-25T22:30:00

Solution 3

Use string.IsNullOrEmpty or use a validator. This is a trivial task, you should consider buying a book on Winforms.

Posted 25-Apr-10 22:30pm

Christian Graus

Christian Graus · Answer 2 · 2010-04-25T22:43:00

PLease don't push 'answer' to add comments. Edit your post. If you don't want to use a validator, the code to write instead is obviously trivial, which is why I suggest you also buy a book to help you understand the basics of how winforms works. There are events, such as the event fired by your save button. You can write code to run, and you can access and check the Text property of your textboxes. A validator does all this for you, but it's not hard to write yourself.

Richard MacCutchan · Answer 3 · 2010-04-25T22:26:00

Just add the code to your button click event for the save button. If any of the boxes do not contain (valid) entries then pop a message to alert the user. I'm not a C# expert (and I don't have a compiler on this PC to check) but I am reasonably sure there are also some events linked to the text boxes that would allow you to disable the Save button until all boxes contain valid entries.

Shahriar Iqbal Chowdhury/Galib · Answer 4 · 2010-04-25T22:29:00

Solution 2

hi,

You will find your solution in the link below,
http://asp.net-tutorials.com/validation/required-field-validator/[^]

Hope this will help...

Posted 25-Apr-10 22:29pm

Shahriar Iqbal Chowdhury/Galib

Adesina Mark · Answer 5 · 2010-04-25T22:33:00

Solution 4

Thanks,

I don't want to use required field validator.

Posted 25-Apr-10 22:33pm