如何为DBGrid特殊细胞着色？

Question

我有一个只有"是"和"否"值的列.我想如果列值为"是",则只有该单元格背景颜色为红色,否则为"否",则背景颜色为黄色,但此代码为整行着色:

if ADOTable1.FieldByName('Clubs').AsString = 'yes' then
begin
  DBGrid1.Canvas.Brush.Color := clRed;
  DBGrid1.DefaultDrawColumnCell(Rect, DataCol, Column, State);
end;

编辑

谢谢你的回复.我的真实代码看起来像那样."netice"列只有"L,D,W".

if Column.FieldName = 'netice' then
 begin
 if ADOTable1.FieldByName('netice').AsString = 'L' then
 DBGrid1.Canvas.Brush.Color := clgreen ;
 if ADOTable1.FieldByName('netice').AsString = 'D' then
 DBGrid1.Canvas.Brush.Color := clRed ;
 if ADOTable1.FieldByName('netice').AsString = 'W' then
 DBGrid1.Canvas.Brush.Color := clYellow ;
 end;
 DBGrid1.DefaultDrawColumnCell(Rect, DataCol, Column, State);
 end;

但我需要L - 绿色,D - 红色,W - 黄色我正在使用Delphi 2010.

Answer 1

您需要添加条件以限制仅将刷子颜色更改为您选择的列.在代码中它可能是:

procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; const Rect: TRect;
  DataCol: Integer; Column: TColumn; State: TGridDrawState);
var
  Field: TField;
begin
  // store the currently rendered cell's column assigned field reference
  // (if any) to the local variable (there's quite expensive getter)
  Field := Column.Field;
  // if the rendered cell's column has assigned a field and this field's
  // name is 'Clubs' (compared without case sensitivity), then, and only
  // then change the brush color...
  if Assigned(Field) and SameText(Field.FieldName, 'Clubs') then
  begin
    if Field.AsString = 'yes' then
      DBGrid1.Canvas.Brush.Color := clRed
    else
      DBGrid1.Canvas.Brush.Color := clYellow;
  end;
  DBGrid1.DefaultDrawColumnCell(Rect, DataCol, Column, State);
end;

之前我更喜欢这个,Column.FieldName因为Column.FieldName还不能保证链接数据集中有这样的字段.因此,以这种方式直接访问现场更安全.