ObjectDataSourceView.ExecuteDelete Method (IDictionary, IDictionary)
Performs a delete operation using the DeleteMethod method and the specified keys and oldValues collection.
Assembly: System.Web (in System.Web.dll)
Parameters
- keys
-
Type:
System.Collections.IDictionary
A IDictionary of parameters used with the DeleteMethod property to perform the delete operation. If there are no parameters associated with the method, pass null.
- oldValues
-
Type:
System.Collections.IDictionary
A IDictionary that contains row values that are evaluated, only if the ConflictDetection property is set to the CompareAllValues field.
Return Value
Type: System.Int32The number of rows deleted; otherwise, -1, if the number is not known. For more information, see Delete.
| Exception | Condition |
|---|---|
| NotSupportedException | The CanDelete property returns false. |
| InvalidOperationException | The ConflictDetection property is set to the CompareAllValues value, and no values are passed in the oldValues collection. |
The ObjectDataSourceView class implements the inherited ExecuteDelete method to delete data from an underlying data store using a business object. Page developers and data-bound control authors do not call the ExecuteDelete method directly; instead, use the publicly exposed Delete method.
Before the delete operation is performed, the OnDeleting method is called to raise the Deleting event. You can handle this event to examine the values of the parameters and perform any preprocessing before the Delete method is called.
To perform a delete operation, the ObjectDataSourceView uses reflection to call the method that is identified by the DeleteMethod property and any associated parameters in the keys and oldValues collections, and then executes it. After the operation completes, the OnDeleted method is called to raise the Deleted event. You can handle this event to examine any return values and error codes, and to perform any post-processing.
Available since 2.0