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NET provides five built-in validation controls that are designed to be used to validate the value of a single input control: For more information on these five controls, check out the Validation Controls section of the ASP. For our tutorial we'll need to use a Required Field Validator in both the Details View and Grid View's Note While ASP.NET 1.x had these same five validation controls, ASP.
There, select each of the Bound Fields and click the "Convert this field into a Template Field" link.
If a user makes a data entry mistake - such as omitting the (such as -50) an exception will be raised from within the depths of the application architecture.
While this exception can be gracefully handled as demonstrated in the previous tutorial, ideally the editing or inserting user interface would include validation controls to prevent a user from entering such invalid data in the first place.
NET 2.0 has added a number of improvements, the main two being client-side script support for browsers other than Internet Explorer and the ability to partition validation controls on a page into validation groups. To accomplish this, click on the Edit Templates link from the Grid View's smart tag to bring up the template editing interface.
For more information on the new validation control features in 2.0, refer to Dissecting the Validation Controls in ASP. From here, you can select which template to edit from the drop-down list.
Figure 7: Set the Required Field Validator's After making these changes, open the page in a browser.
If you attempt to omit the name or enter an invalid price value when editing a product, an asterisk appears next to the textbox.Hit the “Download Source” button on the page to download the zip file containing the Extracted j Query Slider Files " data-medium-file="https://taditdash.files.wordpress.com/2014/06/extracted-jquery-slider-files.png? w=300" data-large-file="https://taditdash.files.wordpress.com/2014/06/extracted-jquery-slider-files.png? w=150 150w, https://taditdash.files.wordpress.com/2014/06/extracted-jquery-slider-files.png? w=300 300w" sizes="(max-width: 604px) 100vw, 604px" /Solution Explorer View " data-medium-file="https://taditdash.files.wordpress.com/2014/06/solution-explorer-view3.png? w=259" data-large-file="https://taditdash.files.wordpress.com/2014/06/solution-explorer-view3.png? w=129 129w, https://taditdash.files.wordpress.com/2014/06/solution-explorer-view3.png? The Grid View and Details View controls in the examples we've explored over the past three tutorials have all been composed of Bound Fields and Check Box Fields (the field types automatically added by Visual Studio when binding a Grid View or Details View to a data source control through the smart tag).When editing a row in a Grid View or Details View, those Bound Fields that are not read-only are converted into textboxes, from which the end user can modify the existing data.Similarly, when inserting a new record into a Details View control, those Bound Fields whose (the default) are rendered as empty textboxes, into which the user can provide the new record's field values.In the Examining the Events Associated with Inserting, Updating, and Deleting tutorial we created a page that listed the names and prices of the products in an editable Grid View.