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Updating database using gridview

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Now, click on the option of the GridView from the top right corner. The new window will open for the selection of Data Source Type. If editing or deleting appears to have no effect, ensure that the DataKeyNames property is set. Old comments will not be carried over. Once we add deleting support to the GridView, the GridView will automatically supply this parameter value, using the value of its DataKeys collection for the row whose Delete button was clicked. The SqlDataSource control also provides optimistic concurrency support. Also clear out the DetailsView s Width and Height properties. As we'll see in this tutorial, these statements can be created manually or can be automatically generated by the SqlDataSource s Configure Data Source wizard. The DetailsView s Default Editing Interface Click to view full-size image Similarly, you can delete the currently selected product or add a new product to the system. You can choose anyone from the given list. Then, after completing the wizard, choose to configure the SelectQuery from the Properties window or, alternatively, go back to the Configure Data Source wizard, but use the Specify a custom SQL statement or stored procedure option. If the data source and table assignment have done successfully, it will return the records as shown below. If you are looking at the Properties window in the Source view, you'll find the DeleteCommand property instead. As Figure 4 shows, when the page is visited through a browser a Delete button is included. Also, keep in mind that for updating and deleting, the DetailsView uses the current product s DataKey value, which is only present if the DataKeyNames property is configured. Note The DetailsView s inserting and editing interfaces lack any sort of customization or validation.

Updating database using gridview


Or we may want to set the value of a table field that does not appear in the GridView. It is a Data source configuration wizard window. In this tutorial we examined both techniques. At the same time, we might want to allow the user to edit, update, or insert data into the core table Products, in this case. You can test the statement by clicking the Test Query. Select the DeleteQuery property, which will bring up a set of ellipses. Change its appearance by changing the Auto Format. Now click on Finish. Start by opening the InsertUpdateDelete. Refer back to the Examining the Events Associated with Inserting, Updating, and Deleting tutorial for a more detailed discussion on the chain of events associated with inserting, updating, and deleting from a data Web control. If the DataKeyNames property is not set or the parameter is not named ProductsID, clicking the Delete button will cause a postback, but won t actually delete any record. You can choose anyone from the given list. The GridView then rebinds to the SqlDataSource, getting back and displaying the current set of products which no longer includes the just-deleted record. We may need to update or insert more or fewer fields, however. This is the table structure. If editing or deleting appears to have no effect, ensure that the DataKeyNames property is set. To illustrate this, let s take an example from the Querying. Note The DetailsView s inserting and editing interfaces lack any sort of customization or validation. Once we add deleting support to the GridView, the GridView will automatically supply this parameter value, using the value of its DataKeys collection for the row whose Delete button was clicked. For now, leave this checkbox unchecked; we'll examine optimistic concurrency with the SqlDataSource control in the next tutorial. Next, go to the Designer of InsertUpdateDelete. Go ahead and check this checkbox. After enabling, you would see the Edit and Delete option is available in the GridView. Then, after completing the wizard, choose to configure the SelectQuery from the Properties window or, alternatively, go back to the Configure Data Source wizard, but use the Specify a custom SQL statement or stored procedure option. After entering the delete-related information into the Command and Parameter Editor dialog box click OK and go to the Source view to examine the resulting declarative markup: After generating the statements it will return to the Data Source Configuration Wizard window. For more information on the upcoming change, we invite you to read our blog post.

Updating database using gridview


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