delphi - How do I refresh a TDBGrid?

Question

I have a TDBGrid called myDbGrid that I want to update after a change to the database (insert/update/delete). How can I do this without reloading my form completely?

myDbGrid uses myDataSource and it uses myQry as its data set.

I've tried the following with no success:

myDbGrid.Refresh;

and

myDbGrid.DataSource.DataSet.Close;
myQry.Close; // '' I think this is redundant
myQry.Open;
myDbGrid.DataSource.DataSet.Refresh;

What have I missed?

(I'll note that the database change is not happening in the tDBGrid - it's there for display only)

Answer 1

这里需要的唯一代码是：

myDbGrid.DataSource.DataSet.Refresh; 

在这种特殊情况下，其他一切都是多余的。

Answer 2

我正在使用 ADOQuery，所以我做了：

ADOQuery1.Active := False;
ADOQuery1.Active := True;

Answer 3

你可以试试这段代码：

ADOQuery.SQL.Clear;
ADOQuery.SQL.Add('select* from table_name');
ADOQuery.Open;