I have an ASP.NET form that takes input from a user. There's a Submit button on the form and a button called Calc which does a calculation to populate a text field. The problem I'm having is that on the form I have a set of <ASP:REQUIREDFIELDVALIDATOR> validators and when the Calc button is pressed the form gets validated. I don't want the required fields to be validated when the Calc button is pressed, only the Submit button. Any way around this?
9 Answers
Set the CausesValidation property to false.
Comments
<asp:Button runat="Server" ... CausesValidation="False" />
Button.CausesValidation (If I remember correctly).
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Try putting CausesValidation="false" as a button attribute.
Some sample code:
http://weblogs.asp.net/scottgu/archive/2005/08/04/421647.aspx
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ASPX Page:
<asp:Button ID="buttonNew" runat="server" Text="New" CausesValidation="False" />
OR
CodeBehind Page: (.cs)
buttonNew.CausesValidation = false;
Check here to know more about Validated and Validating events for the controls.
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Set the button.causesValidation to false.
However, if all it is doing is calculating something based on user input then you shouldn't have it posting back at all. I would recommend using an HTML button and attach some javascript to it to do your work for you and then you won't have this problem.
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While designing the button, you can set its property CausesValidation="false" to avoid validation on button click event. It does not allow to validation the server control and perform its click event only
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To disable validation in a specific control
Set the control's CausesValidation property to false.
<asp:Button id="Button3" runat="server"
Text="Cancel" CausesValidation="False">
</asp:Button>
To disable a validation control
Set the validation controls Enabled property to false.
To disable client-side validation
Set the validation controls EnableClientScript property to false.
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These days (asp.net core version 8.0) just add the attribute formnovalidate to the button.
e.g.
<button asp-route-provider="MSEntraID" formnovalidate class="login-button ms-login">
<img src="~/images/MicrosoftIcon.svg" alt="Microsoft Logo" />
<span id="login-btn" style="display: inline-block;">Log in with Microsoft</span>
</button>
formnovalidateattribute as usual on the<button>directly.requiredproperty, you can useUseSubmitBehavior="false"on your button to prevent the required check.