Vb net gridview rowupdating example
To help ensure that a user's inputs are valid, ASP.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.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.While the default editing and inserting interfaces for the Bound Field and Check Box Field can be helpful, the interface lacks any sort of validation.
As Figure 8 shows, a price value that includes the currency symbol such as .95 is considered invalid.
After setting these three properties of the Required Field Validator, your screen should look similar to Figure 7.
Figure 7: Set the Required Field Validator's After making these changes, open the page in a browser.
Figure 1: The Previous Example Allows Users to Add New Products and Edit Existing Ones (Click to view full-size image) Our goal for this tutorial is to augment the Details View and Grid View to provide validation controls.
In particular, our validation logic will: in action).
Let's enhance this tutorial to include a client-side messagebox summarizing any validation problems.