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如何更改在delphi中的字段上具有相同值的dbgrid行的颜色?在delphi中更改字段值的DBGRID行颜色
例如具有相同的老师
记下所有行:这些行进行分组,并在DBGrid的跟从对方
在此先感谢
如何更改在delphi中的字段上具有相同值的dbgrid行的颜色?在delphi中更改字段值的DBGRID行颜色
例如具有相同的老师
记下所有行:这些行进行分组,并在DBGrid的跟从对方
在此先感谢
您可以轻松地实现这个使用DBGrids onDrawColumnCell事件:
procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; const Rect: TRect;
DataCol: Integer; Column: TColumn; State: TGridDrawState);
begin
if Table1.FieldByName('Teacher').AsString = 'Joe'
then
DBGrid1.Canvas.Brush.Color:=clRed;
DBGrid1.DefaultDrawColumnCell(Rect, DataCol, Column, State);
end;
但是,如果你不知道教师的名字,那么你将不得不实施某种递归的行动,这是我实现:
var TeacherStringList : TStringList;
lastColorUsed : TColor;
AColors : Array of TColor;
function mycolor: TColor;
begin
result := RGB(Random(256), Random(256), Random(256));
end;
procedure TForm3.Button1Click(Sender: TObject);
var CurrS : String;
Index : Integer;
begin
if TeacherStringList.Count <> 0 then TeacherStringList.Clear;
Table1.DisableControls;
try
while not Table1.Eof do
begin
CurrS := Table1.FieldByName('Teacher').AsString;
if (not TeacherStringList.Find(CurrS,Index)) and (not currS.IsEmpty)
then TeacherStringList.Add(CurrS);
Table1.Next;
end;
Table1.First;
SetLength(AColors,TeacherStringList.Count);
for Index := Low(AColors) to High(AColors)
do AColors[Index] := mycolor;
finally
Table1.EnableControls;
end;
end;
procedure TForm3.DBGrid1DrawColumnCell(Sender: TObject; const Rect: TRect;
DataCol: Integer; Column: TColumn; State: TGridDrawState);
var Index : integer;
begin
if (TeacherStringList.Find(Table1.FieldByName('Teacher').AsString,Index))
then
DBGrid1.Canvas.Brush.Color:= AColors[index];
DBGrid1.DefaultDrawColumnCell(Rect, DataCol, Column, State);
end;
procedure TForm3.FormCreate(Sender: TObject);
begin
teacherStringList := TStringList.Create;
teacherStringList.Sorted := True;
end;
procedure TForm3.FormDestroy(Sender: TObject);
begin
teacherStringList.Free;
end;
这是不行的,因为我不知道老师的名字 – teocka
假设:Table1.FieldByName(“老师”)AsString的前10行=“乔”; Table1.FieldByName('Teacher')。AsString ='Jack'in next 5 rows; Table1.FieldByName('Teacher')。AsString ='Jim'in next 8 rows;我需要前10行是灰色的,接下来的5行是白色的,接下来的8行是灰色的,接下来是白色的 – teocka
请注意,在下面的问题中,请尽可能提供尽可能多的数据,更新我的答案。 – Peter