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Thread: Validation Help..

  1. Feb 18th, 2003, 12:01 PM #1
    harsoni
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    Question Validation Help..

    I have a problem, it is I need to validate a Textbox so that it accepts only the numeric value. In ASP I had used client validation for that. In .NET please help me to achive the same.
    Also let me know both the ways to achive this i.e., from client side as well as from server side and also the prons and cons if possible...Thanks for all the help...in advance...

    Sonia
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  2. Feb 18th, 2003, 02:28 PM #2
    DevGrp
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    Ok, this is very easy in .NET.

    Place a text box on the form. Beside the textbox, place a compareValidator control and set these properties.

    Display - Dynamic
    ErrorMessage - "Error message you want to show user"
    ControlToValidate - TextBox1
    Operator - DataTypeCheck
    Type - Integer

    Each time the page is posted back to the server, the validator will check to make sure that only numbers are in the textbox.

    Hope that helps
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  3. Feb 18th, 2003, 03:22 PM #3
    harsoni
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    Dev,
    Well that is good way to do. But now i think I should not allow the user to type wrong data in the first place. So how i can do it from the client side. I presume it is of no use to put code at the Server.

    Sonia
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  4. Feb 18th, 2003, 07:34 PM #4
    DevGrp
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    Sorry, I'm not too advance when it comes to client side scripting. I just decided to learn web programming.
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  6. Feb 18th, 2003, 09:18 PM #5
    dennyd01
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    I've used quite a few Validation controls in ASP.net and they use client-side script by default. I haven't used the "DataTypeCheck" before, but I don't see why it would be any different than the others. Try it out and you'll see. It's pretty obvious when a post-back occurs...
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  7. Feb 18th, 2003, 10:03 PM #6
    hellswraith
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    Originally posted by DevGrp
    Sorry, I'm not too advance when it comes to client side scripting. I just decided to learn web programming.
    Same here, when the questions come in about scripting, I leave them alone. All work should be done on the server....lol.....at least that is how I see it...
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  8. Feb 18th, 2003, 11:03 PM #7
    dennyd01
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    Actually what I meant was that the ASP.net validation controls write the client-side script for you. With the ones I have tried, like RequiredFieldValidators and RangeValidators, all you have to do is put in the tag. The client-side script is handled automatically. (unless you specifiy a server-side function to handle the validation).
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