Delphi cxGrid使用汇总（一）

var  
AYellowStyle: TcxStyle;  
  
procedure TForm1.FormCreate(Sender: TObject);  
begin  
//行颜色  
   AYellowStyle := TcxStyle.Create(Self);  
  AYellowStyle.Color := $0080FFFF;  
  AYellowStyle.TextColor := clMaroon;  
end;  
  
procedure TForm1.cxGrid1DBBandedTableView1StylesGetContentStyle(  
Sender: TcxCustomGridTableView; ARecord: TcxCustomGridRecord;  
AItem: TcxCustomGridTableItem; out AStyle: TcxStyle);  
begin  
if ARecord.Values[cxGrid1DBBandedTableView1Lengthcm.Index] < 81 then  
  AStyle := AYellowStyle;  
end;  

procedure CustomizeColumns;  
procedure LoadData;  
  
procedure TForm1.CustomizeColumns;  
const  
cDistance = 1;  
cRadius = 5;  
cPeriod = 4;  
cPstring = 0;  
var  
I: Integer;  
begin  
DecimalSeparator := ‘.‘;  
with cxGrid1TableView2 do  
for I := 0 to ColumnCount - 1 do  
if I in [cDistance, cRadius] then  
Columns[I].DataBinding.ValueTypeClass := TcxIntegerValueType//1，5列为Integer  
else  
if I in [cPstring,cPeriod] then  
Columns[I].DataBinding.ValueTypeClass := TcxStringValueType//0，4列为String  
else  
Columns[I].DataBinding.ValueTypeClass := TcxFloatValueType;//其他为Float  
end;  
  
procedure TForm1.LoadData;  
const  
AFileName = ‘资产负债表.txt‘;  
AHeaderLineCount = 2;  
  
var  
ARecords, AValues: TStringList;  
I: Integer;  
  
procedure InitRecord(const Str: string);  
var  
J: Integer;  
V: Variant;  
begin  
AValues.CommaText := Str;  
for J := 0 to AValues.Count - 1 do  
if AValues.Strings[J] <> ‘-‘ then  
begin  
V := AValues.Strings[J];  
if not VarIsNull(V) then  
cxGrid1TableView2.DataController.Values[I, J] := V;  
end;  
end;  
  
begin  
if not FileExists(AFileName) then  
raise Exception.Create(‘Data file not found‘);  
  
ARecords := TStringList.Create;  
AValues := TStringList.Create;  
  
with ARecords do  
try  
LoadFromFile(AFileName);  
cxGrid1TableView2.BeginUpdate;  
cxGrid1TableView2.DataController.RecordCount := Count - AHeaderLineCount;  
for I := 0 to Count - (AHeaderLineCount + 1) do  
InitRecord(Strings[I + AHeaderLineCount]);  
finally  
cxGrid1TableView2.EndUpdate;  
ARecords.Free;  
AValues.Free;  
end;  
end;  
  
procedure TForm1.FormCreate(Sender: TObject);  
begin  
CustomizeColumns;  
LoadData_Zcfz;  
end;  
  
****************************************************************************  
14 如何改变列的颜色？  
解决：  
var  
AFirstColumnStyle: TcxStyle;  
  
procedure TForm1.FormCreate(Sender: TObject);  
begin  
//列颜色  
AFirstColumnStyle := TcxStyle.Create(Self);  
AFirstColumnStyle.Color := clAqua;  
AFirstColumnStyle.TextColor := clBlue;  
cxGrid1TableView1.Columns[1].Styles.Content := AFirstColumnStyle;  
end;  
****************************************************************************  
15 Set as default的用法？  
解决：Set as default的用法是为了解决设置参数的方便而做的，比如：  
连好数据库以后，更改cxGrid1DBBandedTableView1->OptionsCustomize-> ColumnFiltering 设为False。（这个设置可以将字段名的下拉单给去掉）更改cxGrid1DBBandedTableView1->OptionsView- >Navigator 设置为True。然后右击cxGrid1DBBandedTableView1，在弹出的菜单栏里面点击Set as default。  
OK，下次你再产生一个新的cxGrid1DBBandedTableView1时这些设置和刚才的一样了。如果需要设置的参数很多的时候，这个Set as default很有用！  
  
****************************************************************************  
16. 怎样使鼠标移动时，相应的单元里的文字变色？  
解决：  
var  
FTrackItem: TcxCustomGridTableItem;  
FTrackRec: TcxCustomGridRecord;  
  
procedure TForm1.cxGrid1DBTableView1CustomDrawCell(  
Sender: TcxCustomGridTableView; ACanvas: TcxCanvas;  
AViewInfo: TcxGridTableDataCellViewInfo; var ADone: Boolean);  
begin  
if (AViewInfo.GridRecord = FTrackRec) and (AViewInfo.Item = FTrackItem) then  
begin  
ACanvas.Font.Color := clred; //红色字体  
ACanvas.Font.Style := [fsUnderline];//带下划线  
end;  
end;  
  
procedure TForm1.cxGrid1DBTableView1MouseMove(Sender: TObject;  
Shift: TShiftState; X, Y: Integer);  
var  
AHitTest: TcxCustomGridHitTest;  
ATrackItem: TcxCustomGridTableItem;  
ATrackRec: TcxCustomGridRecord;  
begin  
ATrackItem := FTrackItem;  
ATrackRec := FTrackRec;  
  
AHitTest := (Sender as TcxGridSite).GridView.ViewInfo.GetHitTest(X, Y);  
if AHitTest is TcxGridRecordCellHitTest then  
begin  
FTrackItem := TcxGridRecordCellHitTest(AHitTest).Item;  
FTrackRec := TcxGridRecordCellHitTest(AHitTest).GridRecord;  
end  
else  
begin  
FTrackItem := nil;  
FTrackRec := nil;  
end;  
  
if (ATrackItem <> FTrackItem) or (ATrackRec <> FTrackRec) then  
begin  
// Invalidate old cell  
if ATrackRec <> nil then  
ATrackRec.Invalidate(ATrackItem);  
// Invalidate new cell  
if FTrackRec <> nil then  
FTrackRec.Invalidate(FTrackItem);  
end;  
end;