(*// 标题:数据网格自动适应宽度 说明:使用DBGrid不可不看 设计:Zswang 日期:2002-03-04 支持:wjhu111@21cn.com //*) ///////Begin Source uses Math; function DBGridRecordSize(mColumn: TColumn): Boolean; { 返回记录数据网格列显示最大宽度是否成功 } begin Result := False; if not Assigned(mColumn.Field) then Exit; mColumn.Field.Tag := Max(mColumn.Field.Tag, TDBGrid(mColumn.Grid).Canvas.TextWidth(mColumn.Field.DisplayText)); Result := True; end; { DBGridRecordSize } function DBGridAutoSize(mDBGrid: TDBGrid; mOffset: Integer = 5): Boolean; { 返回数据网格自动适应宽度是否成功 } var I: Integer; begin Result := False; if not Assigned(mDBGrid) then Exit; if not Assigned(mDBGrid.DataSource) then Exit; if not Assigned(mDBGrid.DataSource.DataSet) then Exit; if not mDBGrid.DataSource.DataSet.Active then Exit; for I := 0 to mDBGrid.Columns.Count - 1 do begin if not mDBGrid.Columns[I].Visible then Continue; if Assigned(mDBGrid.Columns[I].Field) then mDBGrid.Columns[I].Width := Max(mDBGrid.Columns[I].Field.Tag, mDBGrid.Canvas.TextWidth(mDBGrid.Columns[I].Title.Caption)) + mOffset else mDBGrid.Columns[I].Width := mDBGrid.Canvas.TextWidth(mDBGrid.Columns[I].Title.Caption) + mOffset; mDBGrid.Refresh; end; Result := True; end; { DBGridAutoSize } ///////End Source ///////Begin Demo procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState); begin DBGridRecordSize(Column); end; procedure TForm1.Button2Click(Sender: TObject); begin DBGridAutoSize(DBGrid1); end; ///////End Demo