Gridview rowupdating e newvalues null

In the editing interfaces from the previous tutorial collection contained a parameter for each of the method's input parameters.If we want to provide a data Web control that allows the end user to only update a subset of fields, then we need to either programmatically set the missing Overload (Click to view full-size image) Since our example will initially just need the ability to edit data, but not to insert or delete records, take a moment to explicitly indicate that the Object Data Source's class's methods by going to the INSERT and DELETE tabs and choosing (None) from the drop-down list.Figure 3: Choose (None) From the Drop-Down List for the INSERT and DELETE Tabs (Click to view full-size image) After completing this wizard check the Enable Editing checkbox from the Grid View's smart tag.

These concepts carry over to the Details View and Form View controls and also apply to inserting and deleting.

Figure 4: The Grid View Contains a Bound Field or Check Box Field for Each of the Product's Fields (Click to view full-size image) When the end user edits a product and clicks its Update button, the Grid View enumerates those fields that were not read-only.

It then sets the value of the corresponding parameter in the Object Data Source's collection to the value entered by the user.

Go to the Source view to inspect the Object Data Source's declarative markup, which is shown below: property value from the Properties window in the Design view, the property will still exist in the declarative syntax, but will be set to an empty string.

Either remove the property altogether from the declarative syntax or, from the Properties window, set the value to the default, for the product's name, price, and ID, Visual Studio has added a Bound Field or Check Box Field in the Grid View for each of the product's fields.

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