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This was done using the ‘Is Field Null’ method [shown below].
Initializing the SQL data source also had another problem – because certain data needed to be re-encrypted before being sent back to the database.
Normally the details view control automatically detects whether to pass a null in the parameter.
Instead when setting the Update Parameters in the codebehind, the control will update the database with the parameter names entered.
It is often used in a master-details scenario where the selected record of the master control (Grid View, for example) determines the Details View display record.
Details View supports editing just like Grid View, and you can enable the UI the same way using the Auto Generate Edit Button or Command Field. Of course, the data source associated to the Details View must also be configured to support the Update operation (in this case, by specifying an Update Command on Sql Data Source).
Unlike the previous examples that showed the Grid View and Details View bound to the same type of record (an author), this example shows different types of records for the master and details controls (authors and books), associated by a foreign key relationship in the underlying database.
To solve this, you would need to automatically detect whether a value is null and then add it to the Update Parameters list.The following example demonstrates a Details View configured to support editing records in a master-details scenario.Normally data-bound controls automatically re-bind to their data source whenever the data source changes (for example after an update).You can place the Details View on a separate page to perform an Insert or Update operation.The following example shows a Details View configured on a separate page for Insert and Updates.