Validating textbox at server side in vb.net

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VB

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how to validate textbox at server side

Posted 18-Jul-11 20:05pm

ghantaanil

Updated 19-Jul-11 4:05am

Dave Kreskowiak

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walterhevedeich 19-Jul-11 2:09am

Perhaps you need to describe more in detail what type of validation do you want for the textbox. We might just be making assumptions and may give answers that you don't really need, given a statement like this.

Dave Kreskowiak 19-Jul-11 10:06am

I modified the tags as, by your description, this sounds like your using ASP.NET (Web Forms) and not Windows Forms.

3 solutions

Solution 3

To validate at server server side, there are 2 ways,

Either use validation control or validate manually.

1. To apply validattion using validation control you can use CustomValidator. Using this control you can apply client side validation as well.

Check the following link to get the idea of all the validation control,

http://www.w3schools.com/aspnet/aspnet_refvalidationcontrols.asp[^]

2. To Validate manually, just check your control value from code at server side and show message on label if the data is invalid.

Posted 20-Jul-11 9:04am

Mehul M Thakkar

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Prerak Patel · Accepted Answer · 2011-07-18T20:11:00

Solution 1

Use CustomValidator server control for server-side validation.
http://msdn.microsoft.com/en-us/library/aa479013.aspx[^]
Check Listing 15

Posted 18-Jul-11 20:11pm

Prerak Patel

OriginalGriff · Accepted Answer · 2011-07-18T20:23:00

Solution 2

Provided the textbox has runat="server", then just access it via it's name, and use the Text property.

Posted 18-Jul-11 20:23pm

OriginalGriff