Delphi DbgridEh实现鼠标拖动选中列，并使复选框选中

1.先设置表格列的属性

procedure TForm_TaskToDW.InitGrid;
var
MyCol: TColumnEh;
begin
with DBGridEh_Task do
begin
Columns.Clear;
MyCol := Columns.Add;
MyCol.FieldName := 'Select';
MyCol.Title.Caption := '选择';
MyCol.Alignment := taCenter;
MyCol.Width := 50;
MyCol.ReadOnly := false;

MyCol := Columns.Add;
MyCol.FieldName := 'TASK_NAME';
MyCol.Title.Caption := '任务名称';
MyCol.Width := 300;
//MyCol.Alignment := taCenter;
MyCol.ReadOnly := True;
end;
end;

2.创建CDS

procedure TForm_TaskToDW.CreateCDSFlds;
begin
with CDS_Task do
begin
FieldDefs.Clear;
FieldDefs.Add('Select', ftBoolean);
FieldDefs.Add('TASK_ID', ftString, 36);
FieldDefs.Add('TASK_NAME', ftString, 120);
FieldDefs.Add('IS_GEN', ftString, 1);
CreateDataSet;
end;
end;

3.通过下面这个方法实现拖动选中复选框

procedure TForm_TaskToDW.SetSelRowState(State: Boolean = True);
var
I: Integer;
BookMark: TBookmarkListEh;
begin
//BookMark := DBGridEh_Task.SelectedRows; //TBookmarkListEh

for I := 0 to DBGridEh_Task.SelectedRows.Count -1 do
begin
//if DBGridEh_Task.SelectedRows.CurrentRowSelected then //行被选中
CDS_Task.GotoBookmark(Pointer(DBGridEh_Task.SelectedRows.Items[i]));
begin
CDS_Task.Edit;
CDS_Task.FieldByName('Select').AsBoolean := State;
CDS_Task.Post;
end;
end;
end;