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## ASP.NET ImageButton CausesValidation Property The `CausesValidation` property is a member of the ASP.NET `ImageButton` control. It determines whether page validation is performed when the `ImageButton` control is clicked. --- ## Definition and Usage By default, when an `ImageButton` is clicked, ASP.NET automatically triggers validation for all validation controls on the page (such as `RequiredFieldValidator`, `CompareValidator`, or `RegularExpressionValidator`). Setting the `CausesValidation` property to `false` bypasses this behavior. This is particularly useful for "Cancel", "Reset", or "Back" buttons, where you want the user to be able to submit the form or navigate away without being blocked by validation errors. --- ## Syntax ```xml ``` ### Property Values | Value | Description | | :--- | :--- | | `true` | Default. Page validation is performed when the `ImageButton` is clicked. | | `false` | Page validation is bypassed when the `ImageButton` is clicked. | --- ## Code Example The following example demonstrates how to disable validation on an `ImageButton` click. In this scenario, we have a text box that requires input, but clicking the "Cancel" image button will bypass the validation and submit the form. ```xml <%@ Page Language="C#" %>

Name:

``` --- ## Key Considerations ### 1. Validation Groups If you want the `ImageButton` to trigger validation only for a specific set of controls rather than the entire page, do not set `CausesValidation` to `false`. Instead, keep it as `true` and use the `ValidationGroup` property to group the input controls and the button together: ```xml ``` ### 2. Client-Side vs. Server-Side Validation When `CausesValidation` is set to `true` (and client-side scripting is enabled), validation occurs on the client side before the page is posted back to the server. If client-side validation fails, the postback is prevented. Setting `CausesValidation` to `false` prevents both client-side and server-side validation from running for that specific button click.