How to display an empty row when the underlying dataset is empty

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于 2015-03-09 19:58:02 发布

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本文介绍了一种在Delphi中使用DBTableView时，当数据集查询结果为空时如何显示一条空记录的方法。通过在Grid的OnEnter事件中检查数据集是否为空，并在为空的情况下向数据集中添加一条新记录来实现。

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- I have a Grid with a DBTableView. If my dataset query doesn't return anything I would like to show an empty row in my DBTableView (not the NewItemRow, but an empty row). How can I do this?

You can explicitly add a new record to the View's underlying dataset if it's empty. Try to implement the Grid's OnEnter event handler in a similar manner to what is shown below. Hopefully, this will do what you need and it shouldn't be a problem to adapt it.

procedure <Form>.<cxGrid>Enter(Sender: TObject);
var
View: TcxGridDBTableView;
begin
View := TcxGridDBTableView((Sender as TcxGrid).FocusedView);
if View.DataController.DataSet.IsEmpty then
begin
View.DataController.DataSet.Append;
View.Controller.EditingController.ShowEdit;
end;
end;