/// <summary>
///
/// </summary>
/// <param name="arguments"></param>
/// <returns></returns>
protected override IEnumerable ExecuteSelect(DataSourceSelectArguments arguments)
{
if (owner.SelectFunction == null)
throw new DelegateNotFoundException("SelectFunction", "The select function doesn't implemented.");
arguments.RaiseUnsupportedCapabilitiesError(this);
var eventArg = new SelectingEventArgs(arguments, this.GetSelectParameters(), owner.SourceType);
owner.OnSelecting(eventArg);
if (eventArg.Cancel)
return null;
var selectActionEvent = new ActionEventArgs<SelectingEventArgs, IPagingResult>(eventArg, owner.SelectFunction);
IPagingResult paging = selectActionEvent.Execute();
if (paging.QueryException != null)
{
owner.OnExecutionQueryError(new QueryResultEventArgs(paging));
return null;
}
IEnumerable result = paging.Result;
arguments.TotalRowCount = paging.TotalRowCount;
owner.OnSelected(EventArgs.Empty);
return result;
}
/// <summary>
///
/// </summary>
/// <param name="keys"></param>
/// <param name="oldValues"></param>
/// <returns></returns>
protected override int ExecuteDelete(IDictionary keys, IDictionary oldValues)
{
if (owner.DeleteFunction == null)
throw new DelegateNotFoundException("DeleteFunction", "The delete function doesn't implemented.");
if (owner.IdentifierFunction == null)
throw new DelegateNotFoundException("IdentifierFunction", "The identifier function doesn't implemented.");
var eventArg = new DeletingEventArgs(owner.SourceType, owner.IdentifierFunction.Invoke(keys));
owner.OnDeleting(eventArg);
if (eventArg.Cancel)
return 0;
var deletingActionEvent = new ActionEventArgs<DeletingEventArgs, IPersisterResult>(eventArg, owner.DeleteFunction);
var result = deletingActionEvent.Execute();
if (result.QueryException != null)
{
owner.OnExecutionQueryError(new QueryResultEventArgs(result));
return -1;
}
owner.OnDeleted(EventArgs.Empty);
OnDataSourceViewChanged(EventArgs.Empty);
return 1;
}
/// <summary>
///
/// </summary>
/// <param name="values"></param>
/// <returns></returns>
protected override int ExecuteInsert(IDictionary values)
{
if (owner.SaveFunction == null)
throw new DelegateNotFoundException("SaveFunction", "The insert function doesn't implemented.");
var eventArg = new SavingEventArgs(owner.SourceType, values);
owner.OnInserting(eventArg);
if (eventArg.Cancel)
return 0;
var insertingActionEvent = new ActionEventArgs<SavingEventArgs, IPersisterResult>(eventArg, owner.SaveFunction);
try
{
var result = insertingActionEvent.Execute();
if (result.QueryException != null)
{
owner.OnExecutionQueryError(new QueryResultEventArgs(result));
return -1;
}
owner.OnInserted(EventArgs.Empty);
OnDataSourceViewChanged(EventArgs.Empty);
}
catch (Exception)
{
return -1;
}
return 1;
}
