protected override int ExecuteDelete(IDictionary keys, IDictionary oldValues)
{
GenericKeyDataArgs args = new GenericKeyDataArgs(keys, oldValues);
int rowsReturned = this.Owner.Delete(args);
return(rowsReturned);
}
public virtual void OnExecuteDelete(GenericKeyDataArgs a)
{
if (ExecuteDelete != null)
{
ExecuteDelete(this, a);
}
else
{
throw new NotImplementedException(string.Format("ExecuteDelete Handler for the GenericDataSource '{0}' is not implemented.", this.ID));
}
}
/// <summary>
/// Triggers the data source Update operation.
/// It ofers support for Optimistic concurrency, by storing the original and updated parameter values.
/// </summary>
/// <param name="args">The GenericDeleteArgs arguments.</param>
/// <returns>The number of affected rows.</returns>
public virtual int Delete(GenericKeyDataArgs args)
{
if (this.ExecuteDelete != null)
{
ExecuteDelete(this, args);
}
else
{
OnExecuteDelete(args);
}
return(args.RowsAffected);
}
protected void OnDelete(object sender, GenericKeyDataArgs arg)
{
if (EnableDelete && Data == null)
{
var set = Context.Set <TElement>();
var x = arg.GetDataItem <TElement>();
set.Remove(x);
Context.SaveChanges();
changed = false;
RaiseDataSourceChangedEvent(EventArgs.Empty);
}
}