1. 程式人生 > >cxGrid用法-最新

cxGrid用法-最新

ise 根據 新增 top dia 表頭 true star promise

cxGrid用法步

1.你先放一個cxGrid,設置好View,設置View.DataController連接的DataSource 2.激活DataSource連接的DataSet,雙擊cxGrid,點擊Retrieve Fields,取得所有的Column 3.設置View的OptionsView.Footer=True,OptionsView.GroupFooters=True,這是為了把分組小計和總計面板顯示出來 4.將“訂單號”字段拖到cxGrid上方的分組面板(GroupbyBox),將數據按“訂單號”分組。這時你會發現單身所有的數據都縮起來了,如果想使所有的數據都展開,可以設置View.DataController.Options.dcoGroupsAlwaysExpanded=True 5.設置分組小計:把View.DataController.Summary.DefaultGroupSummaryItems點開,新增一個Item,Column屬性在下拉裏選擇“數量”字段,FieldName屬性為空,Format屬性可以設置數值的顯示格式,Kind屬性下拉skSum加總,Position屬性一定要選擇spFooter。 6.設置總計:把View.DataController.Summary.FooterSummaryItems點開,新增一個Item,Column屬性在下拉裏選擇“數量”字段,FieldName屬性為空,Format屬性可以設置數值的顯示格式,Kind屬性下拉skSum加總,Position屬性一定要選擇spFooter。 大功告成,按F9看一下勝利果實吧。 再奉送一個技巧,在Form1再放一個TcxGridPopupMenu控件,就在cxGrid控件旁邊的那個,把TcxGridPopupMenu的Grid屬性設置成你的cxGrid。 然後運行程序,在運行狀態,點擊Grid上的所有地方,左鍵或右鍵,你都會有意外收獲。

(1)動態設置顯示格式
procedure SetDisplayFormat(ACtrlData: TClientDataSet;
  TbView: TcxGridDBTableView);
var
  i: integer;
begin
  if ACtrlData.RecordCount <= 0 then Exit;
  try
    TbView.ClearItems;
    ACtrlData.First;
    for i := 0 to ACtrlData.RecordCount - 1 do
    begin
      if ACtrlData.FieldByName(‘SQBF_DisplayInGrid‘).AsString = ‘1‘ then //在表格中顯示
      with TbView.CreateColumn do
      begin
        DataBinding.FieldName := ACtrlData.FieldByName(‘SQBF_FieldName‘).AsString;
        Caption := ACtrlData.FieldByName(‘SQBF_Caption‘).AsString; //字段中文標題
        Hint := ACtrlData.FieldByName(‘SQBF_Hint‘).AsString;
        Width := ACtrlData.FieldByName(‘SQBF_Width‘).AsInteger;
        HeaderAlignmentHorz := taCenter;
      end;
      ACtrlData.Next;
    end;
  except
    on E: Exception do
      SaveLog(‘設置顯示格式時出錯:‘ + E.Message);
  end;
end;

(2)顯示行號
procedure TFmQueryBase.cxDBViewMasterCustomDrawIndicatorCell(
  Sender: TcxGridTableView; ACanvas: TcxCanvas;
  AViewInfo: TcxCustomGridIndicatorItemViewInfo; var ADone: Boolean);
var
  FValue: string;
  FBounds: TRect;
begin
  FBounds := AViewInfo.Bounds;
  if (AViewInfo is TcxGridIndicatorRowItemViewInfo) then
  begin
    ACanvas.FillRect(FBounds);
    ACanvas.DrawComplexFrame(FBounds, clBlack, clBlack, [bBottom, bLeft, bRight], 1);
    FValue := IntToStr(TcxGridIndicatorRowItemViewInfo(AViewInfo).GridRecord.Index+1);
    InflateRect(FBounds, -3, -2); //Platform specific. May not work on Linux.
    ACanvas.Font.Color := clBlack;
    ACanvas.Brush.Style := bsClear;
    ACanvas.DrawText(FValue, FBounds, cxAlignCenter or cxAlignTop);
    ADone := True;
  end;
end;
(3)設置顯示格式,我的項目要求先動態添加字段,這時不知道字段類型,所以設置DisplayFormat不方便,我還沒有找到好方法。
所以采用打開數據集後再設置:
procedure TFmQueryBase.cdsMasterAfterOpen(DataSet: TDataSet);
var
  i: Integer;
begin
  for i := 0 to cxDBViewMaster.DataController.DataSet.FieldCount -1 do
  begin
    if cxDBViewMaster.DataController.DataSet.Fields[i] is TNumericField then
    begin
      if Pos(‘AMOUNT‘, UpperCase(cxDBViewMaster.DataController.DataSet.Fields[i].FieldName)) > 0 then
      begin
        TNumericField(cxDBViewMaster.DataController.DataSet.Fields[i]).DisplayFormat := ‘#,##0.000‘;
        Continue;
      end;
      if Pos(‘QUANTITY‘, UpperCase(cxDBViewMaster.DataController.DataSet.Fields[i].FieldName)) > 0 then
      begin
        TNumericField(cxDBViewMaster.DataController.DataSet.Fields[i]).DisplayFormat := ‘#,##0.000‘;
        Continue;
      end;
       if Pos(‘MONEY‘, UpperCase(cxDBViewMaster.DataController.DataSet.Fields[i].FieldName)) > 0 then
      begin
        TNumericField(cxDBViewMaster.DataController.DataSet.Fields[i]).DisplayFormat := ‘#,##0.00‘;
        Continue;
      end;
   end;
  end;
end; 



2007-7-19 12:48:54    
 查看評語&raquo;&raquo;&raquo;     

 2007-7-19 12:53:09    別人的,轉載http://www.showding.cn/item/cxGrid__182526.aspx

最近在學習使用cxGrid,安裝的版本是ExpressQuantumGrid   Suite   v5.10   
  我發現這個控件功能雖然強大,但是非常難用。   
    
  現在我手頭就有幾個問題還沒解決:   
  1)主從模式下導出Excel中文會產生亂碼,而且從表內容沒有導出。   
  我不知道是不是因為我的字段名包括單引號的原因。   
  導出代碼:ExportGrid4ToExcel(FileName,   cxGrid);   
    
  2)主從模式下通過按鈕對從表添加/刪除行,代碼怎麽寫。   
  附:單表添加/刪除行的代碼   
  procedure   TFormAccount.cxButtonNewClick(Sender:   TObject);   
  begin   
      Self.tvAccount.DataController.Append;   
      Self.tvAccount.Columns[0].Focused   :=   True;   
      cxGrid.SetFocus;   
  end;   
    
  procedure   TFormAccount.cxButtonDeleteClick(Sender:   TObject);   
  begin   
      if   Self.tvAccount.DataController.RowCount   =   0   then   
          Exit;   
      if   Application.MessageBox(‘確認刪除當前記錄?‘,   ‘確認刪除‘,   
          MB_YesNo   +   MB_IconQuestion)   =   IDNO   then   
          Exit;   
      Self.tvAccount.DataController.DeleteFocused;   
  end;   
    
  3)動態創建主從結構出錯(Compiler沒錯,運行時出現系統錯誤0000000018),   
  我使用了二個ADOStoreProcedure作主從表   
  代碼如下:   
  var   
      Level:   TcxGridLevel;   
      GridView:   TcxGridDBTableView;   
  begin   
      Level   :=   cxGrid1.Levels[0].Add;   
      GridView   :=   TcxGridDBTableView(cxGrid1.CreateView(TcxGridDBTableView));   
      GridView.DataController.DataSource   :=   Self.dsDetail;   
    
      GridView.DataController.KeyFieldNames   :=   ‘PurchOrderID;POLineNbr;PromiseDate;ReceiverDate‘;   
      GridView.DataController.MasterKeyFieldNames   :=   ‘VendorID‘;   
      GridView.DataController.DetailKeyFieldNames   :=   ‘VendorID‘;   
      GridView.DataController.DataModeController.SmartRefresh   :=   True;   
    
      GridView.OptionsCustomize.ColumnHiding   :=   True;   
      GridView.OptionsCustomize.ColumnsQuickCustomization   :=   True;   
      GridView.OptionsData.Deleting   :=   False;   
      GridView.OptionsData.Inserting   :=   False;   
      GridView.OptionsView.Indicator   :=   True;   
      Level.GridView   :=   GridView;   
    
      GridView   :=   TcxGridDBTableView(cxGrid1.Levels[0].GridView);   
      GridView.DataController.KeyFieldNames   :=   ‘VendorID‘;   
      GridView.OptionsView.GroupByBox   :=   False;   
    
      //顯示主表內容   
      tvResult.BeginUpdate;   
      tvResult.ClearItems;   
      tvResult.DataController.CreateAllItems;   
      tvResult.EndUpdate;   
    
      //顯示明細表內容   
      GridView   :=   TcxGridDBTableView(cxGrid1.Levels[0].Items[0].GridView);   
      GridView.BeginUpdate;   
      GridView.ClearItems;   
      GridView.DataController.CreateAllItems;   
      GridView.DataController.Refresh;   
      GridView.EndUpdate;   
  end;   
  


此樓回復Re:  
--------------------------------------------------------------------------------

小技巧:用代碼展開/收縮主從結構   
  Self.tvDepartment.ViewData.Expand(True);   
  Self.tvDepartment.ViewData.Collaspe(True);   
  註:tvDepartment為主表對應的TableView


此樓回復Re:  
--------------------------------------------------------------------------------

你說的這幾個問題我也遇到過。   
  第一個問題是編碼的問題,修改了其中關於編碼的函數,OK.   
  第二個問題在cxGrid的社區可以找到解答,但從表必須滿足某種條件,例如關鍵字排序。   
  第三個問題的解決辦法,你可以嘗試在動態創建的代碼前後加上:   
  grid.beginupdate;   
  ...   
  grid.endupdate   
  來解決。


此樓回復Re:  
--------------------------------------------------------------------------------

沒用過   
  不要經常使用三方控件


此樓回復Re:  
--------------------------------------------------------------------------------

to   tttk(網絡芝麻):   
  第一個問題:如何修改啊,貼出代碼   
  第二個問題:沒搜到啊   
  第三個問題:試一下再說


此樓回復Re:  
--------------------------------------------------------------------------------

不要經常使用三方控件   
  ======================   
  我感覺不用cxGrid的話,沒必要用Delphi了,呵呵


此樓回復Re:  
--------------------------------------------------------------------------------

樓上這話是不是有點問題?DELPHI能做得事情很多很多,難道非要用CXGRID?CXGRID不是用DELPHI做出來得?


此樓回復Re:  
--------------------------------------------------------------------------------

沒用過.....


此樓回復Re:  
--------------------------------------------------------------------------------

回復人:   zxkid(沒有人會像我這樣...)   (   )   信譽:101     2006-01-06   16:58:00     得分:   0       
      
      
        不要經常使用三方控件   
  ======================   
  我感覺不用cxGrid的話,沒必要用Delphi了,呵呵   
        
      
  **********   
  樓主乃天人也!!


此樓回復Re:  
--------------------------------------------------------------------------------

呵呵


此樓回復Re:  
--------------------------------------------------------------------------------

cxGrid比較不錯,我也使用過導出到Excel,沒有遇到你說的亂碼   
    
  主從表也沒有問題的,其實跟單表操作還不是一回事


此樓回復Re:  
--------------------------------------------------------------------------------

up


此樓回復Re:  
--------------------------------------------------------------------------------

沒用過cxGrid,以後考慮


此樓回復Re:  
--------------------------------------------------------------------------------

樓主乃天人也!!   
  =============================   
  Delphi下有cxGrid,   .NET下有XtraGrid,   它們都是同一公司出的。   
  遲早都會轉到.NET,所以。。。


此樓回復Re:  
--------------------------------------------------------------------------------

路過


此樓回復Re:  
--------------------------------------------------------------------------------

用過,挺好,只會使用最簡單的。


此樓回復Re:  
--------------------------------------------------------------------------------

發一個郵件給我,我把解決亂碼後的源代碼發一分給你,放到你的項目文件夾下即可。   
  [email protected]
/* */ 此樓回復Re: -------------------------------------------------------------------------------- 第二個問題:https://www.devexpress.com/Support/Center/default.aspx?view=ViewIssue&issueid=B2691 此樓回復Re: -------------------------------------------------------------------------------- 謝謝tttk(網絡芝麻) 第二個問題:我現在直接讓用戶用導航條的刪除/添加按鈕了。根據你給的網址上的內容我知道大概該怎麽寫了,有空再試試。 第一個問題:不光是亂碼問題,還有從表內容沒導出的問題。 只有一個表的話是不會出現亂碼的。 第三個問題:還沒來得及試。 此樓回復Re: -------------------------------------------------------------------------------- 第一個問題:看了一下幫助,原來cxGrid不支持主從表的導出,只能導出主表(頂層表)的內容。暈 此樓回復Re: -------------------------------------------------------------------------------- 貼一些小技巧,希望與各位使用cxGrid的朋友共同交流 各位有什麽好個技巧也可以貼出來: 技巧二:在內置右鍵菜單的後面增加菜單項 首先應在Form上加一個cxGridPopupMenu控件 以啟用右鍵菜單 UseBuildInPopupMenus設為True procedure TFormItemList.FormCreate(Sender: TObject); var AMenu: TComponent; FMenuItem, FSubMenuItem: TMenuItem; begin AMenu := nil; if cxGridPopupMenu.BuiltInPopupMenus.Count = 0 then Exit; AMenu := cxGridPopupMenu.BuiltInPopupMenus[0].PopupMenu; //第一個內置右鍵菜單(表頭菜單) if Assigned(AMenu) and AMenu.InheritsFrom(TPopupMenu) then begin TPopupMenu(AMenu).AutoHotkeys := maManual; //手動熱鍵 //------------------------- FMenuItem := TMenuItem.Create(Self); FMenuItem.Caption := ‘-‘; FMenuItem.Name := ‘miLineForGroup‘; TPopupMenu(AMenu).Items.Add(FMenuItem); //展開所有組 FMenuItem := TMenuItem.Create(Self); FMenuItem.Name := ‘miExpandAllGroup‘; FMenuItem.Caption := ‘展開所有組(&X)‘; FMenuItem.OnClick := miExpandAllGroupClick; TPopupMenu(AMenu).Items.Add(FMenuItem); //收縮所有組 FMenuItem := TMenuItem.Create(Self); FMenuItem.Name := ‘miCollapseAllGroup‘; FMenuItem.Caption := ‘收縮所有組(&O)‘; FMenuItem.OnClick := miCollapseAllGroupClick; TPopupMenu(AMenu).Items.Add(FMenuItem); //------------------------- FMenuItem := TMenuItem.Create(Self); FMenuItem.Caption := ‘-‘; TPopupMenu(AMenu).Items.Add(FMenuItem); //過濾面板 FMenuItem := TMenuItem.Create(Self); FMenuItem.Name := ‘miFilterPanel‘; FMenuItem.Caption := ‘過濾面板(&P)‘; //自動顯示 FSubMenuItem := TMenuItem.Create(Self); FSubMenuItem.Name := ‘miFilterPanelAuto‘; FSubMenuItem.Caption := ‘自動(&A)‘; FSubMenuItem.RadioItem := True; FSubMenuItem.GroupIndex := 5; //指定同一組 FSubMenuItem.Checked := True; FSubMenuItem.OnClick := miFilterPanelClick; FMenuItem.Add(FSubMenuItem); //加入二級子菜單 //總是顯示 FSubMenuItem := TMenuItem.Create(Self); FSubMenuItem.Name := ‘miFilterPanelAlways‘; FSubMenuItem.Caption := ‘總是顯示(&W)‘; FSubMenuItem.RadioItem := True; FSubMenuItem.GroupIndex := 5; FSubMenuItem.OnClick := miFilterPanelClick; FMenuItem.Add(FSubMenuItem); //從不顯示 FSubMenuItem := TMenuItem.Create(Self); FSubMenuItem.Name := ‘miFilterPanelNerver‘; FSubMenuItem.Caption := ‘從不顯示(&N)‘; FSubMenuItem.RadioItem := True; FSubMenuItem.GroupIndex := 5; FSubMenuItem.OnClick := miFilterPanelClick; FMenuItem.Add(FSubMenuItem); TPopupMenu(AMenu).Items.Add(FMenuItem); //自定義過濾 FMenuItem := TMenuItem.Create(Self); FMenuItem.Name := ‘miCustomFilter‘; FMenuItem.Caption := ‘自定義過濾(&M)‘; FMenuItem.OnClick := miCustomFilterClick; TPopupMenu(AMenu).Items.Add(FMenuItem); //過濾管理器 FMenuItem := TMenuItem.Create(Self); FMenuItem.Name := ‘miFilterBuilder‘; TPopupMenu(AMenu).Images.AddImage(FormMain.ImageListExtend, 44); //添加圖標圖像 FMenuItem.ImageIndex := TPopupMenu(AMenu).Images.Count - 1; //指定圖標序號 FMenuItem.Caption := ‘過濾管理器‘; FMenuItem.OnClick := Self.miFilterBuilderClick; TPopupMenu(AMenu).Items.Add(FMenuItem); //--------------------- FMenuItem := TMenuItem.Create(Self); FMenuItem.Caption := ‘-‘; TPopupMenu(AMenu).Items.Add(FMenuItem); //導出 FMenuItem := TMenuItem.Create(Self); FMenuItem.Name := ‘miExport‘; TPopupMenu(AMenu).Images.AddImage(FormMain.ImageListExtend, 37); FMenuItem.ImageIndex := TPopupMenu(AMenu).Images.Count - 1; FMenuItem.Caption := ‘導出(&E)‘; FMenuItem.OnClick := Self.miExportClick; TPopupMenu(AMenu).Items.Add(FMenuItem); //打印 FMenuItem := TMenuItem.Create(Self); FMenuItem.Name := ‘miPrint‘; FMenuItem.Caption := ‘打印(&P)‘; TPopupMenu(AMenu).Images.AddImage(FormMain.ImageListExtend, 14); FMenuItem.ImageIndex := TPopupMenu(AMenu).Images.Count - 1; FMenuItem.OnClick := Self.miPrintClick; TPopupMenu(AMenu).Items.Add(FMenuItem); end; end; procedure TFormItemList.miExportClick(Sender: TObject); var FileName, FileExt, msg: String; begin if Self.aqyQuery.IsEmpty then begin msg := ‘沒有導出數據...‘; Application.MessageBox(PChar(msg), PChar(Application.Title), MB_OK or MB_IconWarning); Exit; end; Self.SaveDialogExport.Filter := ‘Excel文件 (*.xls)|*.xls|XML文件 (*.xml)|*.xml‘ + ‘|文本文件 (*.txt)|*.txt|網頁文件 (*.html)|*.html‘; Self.SaveDialogExport.Title := ‘導出為‘; if not Self.SaveDialogExport.Execute then Exit; FileName := Self.SaveDialogExport.FileName; FileExt := LowerCase(ExtractFileExt(FileName)); if FileExt = ‘.xls‘ then ExportGrid4ToExcel(FileName, Self.cxGrid1) else if FileExt = ‘.xml‘ then ExportGrid4ToXML(FileName, Self.cxGrid1) else if FileExt = ‘.txt‘ then ExportGrid4ToText(FileName, Self.cxGrid1) else if FileExt = ‘.html‘ then ExportGrid4ToHTML(FileName, Self.cxGrid1) else begin msg := ‘不支持的導出文件類型...‘; Application.MessageBox(PChar(msg), PChar(Application.Title), MB_OK or MB_IconError); Exit; end; msg := ‘導出完成...‘; Application.MessageBox(PChar(msg), PChar(Application.Title), MB_OK or MB_IconInformation); end; procedure TFormItemList.miPrintClick(Sender: TObject); begin //打印 Self.dxComponentPrinter.Preview(True, Self.dxComponentPrinterLink1); end; procedure TFormItemList.cxGridPopupMenuPopup(ASenderMenu: TComponent; AHitTest: TcxCustomGridHitTest; X, Y: Integer; var AllowPopup: Boolean); begin if GetHitTypeByHitCode(AHitTest.HitTestCode) = gvhtColumnHeader then //右擊列標題時 begin //if tvResult.DataController.Groups.GroupingItemCount > 0 then if tvResult.GroupedColumnCount > 0 then //有分組時顯示 begin TMenuItem(Self.FindComponent(‘miLineForGroup‘)).Visible := True; TMenuItem(Self.FindComponent(‘miExpandAllGroup‘)).Visible := True; TMenuItem(Self.FindComponent(‘miCollapseAllGroup‘)).Visible := True; end else begin TMenuItem(Self.FindComponent(‘miLineForGroup‘)).Visible := False; TMenuItem(Self.FindComponent(‘miExpandAllGroup‘)).Visible := False; TMenuItem(Self.FindComponent(‘miCollapseAllGroup‘)).Visible := False; end; end; end; procedure TFormItemList.miFilterBuilderClick(Sender: TObject); begin //過濾管理器 //彈出Filter Builder Dialog對話框 tvResult.Filtering.RunCustomizeDialog; end; procedure TFormItemList.miCustomFilterClick(Sender: TObject); var AHitTest: TcxCustomGridHitTest; begin //自定義過濾 //彈出Custom Filter Dialog對話框 AHitTest := cxGridPopupMenu.HitTest; if GetHitTypeByHitCode(AHitTest.HitTestCode) = gvhtColumnHeader then //獲得右擊的列 tvResult.Filtering.RunCustomizeDialog(TcxGridColumnHeaderHitTest(AHitTest).Column); end; procedure TFormItemList.miFilterPanelClick(Sender: TObject); var mi: TMenuItem; begin //隱藏/顯示過濾面板 mi := TMenuItem(Sender); mi.Checked := True; if mi.Name = ‘miFilterPanelAlways‘ then tvResult.Filtering.Visible := fvAlways else if mi.Name = ‘miFilterPanelNerver‘ then tvResult.Filtering.Visible := fvNever else tvResult.Filtering.Visible := fvNonEmpty; end; procedure TFormItemList.miExpandAllGroupClick(Sender: TObject); begin //展開所有組 tvResult.DataController.Groups.FullExpand; end; procedure TFormItemList.miCollapseAllGroupClick(Sender: TObject); begin //收縮所有組 tvResult.DataController.Groups.FullCollapse; end; 此樓回復Re: -------------------------------------------------------------------------------- 在用,留名 此樓回復Re: -------------------------------------------------------------------------------- 技巧三 按條件計算合計值 在Footer的第一列顯示[合計:] 加一個Summary項,Column設為Grid的第一列,Kind設為skNone 在該Summary項的OnGetText事件中,輸入: procedure TFormExpense.tvExpenseTcxGridDBDataControllerTcxDataSummaryFooterSummaryItems2GetText( Sender: TcxDataSummaryItem; const AValue: Variant; AIsFooter: Boolean; var AText: String); begin AText := ‘合計:‘; end; 按條件匯總: 在TableView的DataController->Summary->FooterSummary->OnSummary事件中,輸入: procedure TFormExpense.tvExpenseDataControllerSummaryFooterSummaryItemsSummary( ASender: TcxDataSummaryItems; Arguments: TcxSummaryEventArguments; var OutArguments: TcxSummaryEventOutArguments); begin //得到字段名 TcxDBDataSummaryItem(Arguments.SummaryItem).FieldName; if (ASender.DataController.Values[Arguments.RecordIndex, tvExpenseLevel.Index] > 1) //只統計Level列=1的值 and (TcxDBDataSummaryItem(Arguments.SummaryItem).Kind = skSum) then OutArguments.Value := 0; //Level > 1的統計值設為0 end; 此樓回復Re: -------------------------------------------------------------------------------- 借貴地一用,問個CXGrid問題,在cxgrid中如何使一些行不能編輯,如:字段isenable = false的行 此樓回復Re: -------------------------------------------------------------------------------- 樓上的問題 請參考下面的技巧 技巧四:根據某列的值設定其它列的可編輯性 procedure TFormUser.tvUserEditing(Sender: TcxCustomGridTableView; AItem: TcxCustomGridTableItem; var AAllow: Boolean); begin //如果第三列值為True,則第4列不能修改 if (tvUser.Controller.FocusedRecord.Values[2] = True) and (AItem.Index = 4) then AAllow := False else AAllow := True; end; 此樓回復Re: -------------------------------------------------------------------------------- 技巧五:保存/恢復Grid布局 //恢復布局 IniFileName := ExtractFilePath(Application.ExeName) + ‘Layout\‘ + Self.Name + ‘.ini‘; if FileExists(IniFileName) then Self.tvResult.RestoreFromIniFile(IniFileName) //從布局文件中恢復 else begin Self.tvResult.BeginUpdate; for i := 0 to Self.tvResult.ItemCount - 1 do Self.tvResult.Items[i].ApplyBestFit; //調整為最佳寬度 Self.tvResult.EndUpdate; end; //保存布局 IniFileName := ExtractFilePath(Application.ExeName) + ‘Layout\‘ + Self.Name + ‘.ini‘; if not DirectoryExists(ExtractFileDir(IniFileName)) then CreateDir(ExtractFileDir(IniFileName)); Self.tvResult.StoreToIniFile(IniFileName); //保存為布局文件 此樓回復Re: -------------------------------------------------------------------------------- 借用地問一下:在 cxgrid中,如果我同時選中主表與子表中的記錄,怎麽樣能同時進行對其所選記錄進行處理呢。 我現在只能判斷 焦點是在主表還是從表中,然後只能對主表或子表中的數據進行處理。 此樓回復Re: -------------------------------------------------------------------------------- 看來用cxGrid人不多啊 再多貼一些技巧,需要的朋友頂一下 ========================================================================== 在主從TableView中根據主TableView得到對應的從TableView var ADetailDC: TcxGridDataController; AView: TcxCustomGridTableView; begin with cxGrid1DBTableView1.DataController do ADetailDC := TcxGridDataController(GetDetailDataController(FocusedRecordIndex, 0)); AView := ADetailDC.GridView; end; ============================================================================== 定位在第一行並顯示內置編輯器 cxDBVerticalGrid1.FocusedRow := cxDBVerticalGrid1.Rows[0]; cxDBVerticalGrid1.ShowEdit; ============================================================================== 隱藏 "<No data to display>" 字符串 該文本存儲在scxGridNoDataInfoText資源字符串,可以將該資源字符串的內容設為空 來隱藏該文本。 uses cxClasses, cxGridStrs; ... cxSetResourceString(@scxGridNoDataInfoText, ‘‘); //如果"<No data to display>" 字符串已經顯示,需要調用: <View>.LayoutChanged; ============================================================ 刪除應用過濾後的行 var I: Integer; begin with <GridView> do for I := 0 to ViewData.RecordCount - 1 do begin ViewData.Records[0].Focused := True; DataController.DataSet.Delete; end; ============================================================= 根據單元的值設置樣式 procedure <aForm>.<aColumn>StylesGetContentStyle( Sender: TcxCustomGridTableView; ARecord: TcxCustomGridRecord; AItem: TcxCustomGridTableItem; out AStyle: TcxStyle); begin if ARecord.Values[AItem.Index] = aSomeValue then AStyle := <aSomeStyle>; end; procedure <aForm>.<aView>StylesGetContentStyle( Sender: TcxCustomGridTableView; ARecord: TcxCustomGridRecord; AItem: TcxCustomGridTableItem; out AStyle: TcxStyle); var AColumn: TcxCustomGridTableItem; begin AColumn := (Sender as TcxGridDBTableView).GetColumnByFieldName(‘Email‘); if VarToStr(ARecord.Values[AColumn.Index]) = ‘‘ then AStyle := cxStyleNullEmail; end; ============================================================================== TcxCustomGridTableView.FindItemByName, TcxGridDBTableView.GetColumnByFieldName or TcxGridDBDataController.GetItemByFieldName with cxGrid1DBBandedTableView1.DataController do AValue := Values[FocusedRecordIndex, GetItemByFieldName(‘SomeFieldName‘).Index]; =================================================================== 動態生成BandedView var AView: TcxCustomGridView; begin AView := <cxGrid>.CreateView(TcxGridDBBandedTableView); TcxGridDBBandedTableView(AView).DataController.DataSource := <DataSource>; TcxGridDBBandedTableView(AView).Bands.Add; with TcxGridDBBandedTableView(AView).Bands.Add do begin Visible := False; FixedKind := fkLeft; end; TcxGridDBBandedTableView(AView).DataController.CreateAllItems; <cxGridLevel>.GridView := AView; 此樓回復Re: -------------------------------------------------------------------------------- ====================================================================== 當底層數據集為空時顯示一條空記錄 procedure <Form>.<cxGrid>Enter(Sender: TObject); var View: TcxGridDBTableView; begin View := TcxGridDBTableView((Sender as TcxGrid).FocusedView); if View.DataController.DataSet.IsEmpty then begin View.DataController.DataSet.Append; View.Controller.EditingController.ShowEdit; end; end; ======================================================================= 在當前View插入記錄 使用FocusedView屬性得到當前焦點View,用View.DataController得到對應的Data Controller, 之後使用Data Controller的方法來操作數據: - Append - Insert - Post - Cancel - DeleteFocused - DeleteSelection 示例: var ARecIndex: Integer; … View.DataController.Append; ARecIndex := View.DataController.FocusedRecordIndex; View.DataController.Values[ARecIndex, SomeItemIndex] := SomeValue; View.DataController.Post; 另外一種方法是使用View.DataController.DataSource.DataSet得到底層數據集後,再用數據集的 方法來操作數據。 ======================================================================== 激活內置編輯控件 1) <aView>.Controller.EditingController.ShowEdit(<aColumn>); 2) <aView>.Controller.EditingController.StartEditShowingTimer(<aColumn>); 3) <aView>.Controller.EditingItem := <aColumn>; 4) <aColumn>.Editing := True; 隱藏內置編輯控件 <aView>.Controller.EditingController.HideEdit(True); =========================================================================== 移除一個分組列 <aColumn>.GroupIndex := -1; <aColumn>.Visible := True; =========================================================================== 保存修改到數據庫 procedure <aForm>.FormClose(Sender: TObject; var Action: TCloseAction); begin if (<aGrid>.FocusedView <> nil) and (<aGrid>.FocusedView.DataController.EditState <> []) then <aGrid>.FocusedView.DataController.Post; end; ============================================================================ 設置內置右鍵菜單 內置右鍵菜單包括二個菜單:cxGridStdHeaderMenu, TcxGridStdFooterMenu uses cxGridStdPopupMenu; procedure TForm1.cxGridPopupMenu1Popup(ASenderMenu: TComponent; AHitTest: TcxCustomGridHitTest; X, Y: Integer; var AllowPopup: Boolean); begin if ASenderMenu is TcxGridStdHeaderMenu then TcxGridStdHeaderMenu(ASenderMenu).OnPopup := StdHeaderMenuPopup; end; procedure TForm1.StdHeaderMenuPopup(Sender: TObject); var I: Integer; begin with TcxGridStdHeaderMenu(Sender).Items do for I := 0 to Count - 1 do if Items[I].Caption = ‘Group By Box‘ then begin Items[I].Enabled := False; System.Break; end end; =========================================================================== 得到選中記錄的值 1) View.DataController.DataModeController.GridMode = False時 RecIdx := View.Controller.SelectedRecords[i].RecordIndex; ColIdx := View.DataController.GetItemByFieldName(AFieldName).Index; OutputVal := View.DataController.Values[RecIdx, ColIdx]; //RecID := View.DataController.GetRecordId(RecIdx); //OutputVal := ADataSet.Lookup(View.DataController.KeyFieldNames, RecID, AFieldName); 2) View.DataController.DataModeController.GridMode = True時 Bkm := View.DataController.GetSelectedBookmark(ASelectedRecordIndex); if ADataSet.BookmarkValid(TBookmark(Bkm)) then begin ADataSet.Bookmark := TBookmark(Bkm); OutputVal := ADataSet.FieldByName(AFieldName).Value; end; View.BeginUpdate; View.DataController.BeginLocate; try // make changes here… finally View.DataController.EndLocate; View.EndUpdate; end; ============================================================= 在GridMode禁用內置的右鍵Footer菜單 uses cxGridStdPopupMenu; procedure cxGridPopupMenuOnPopup(...) begin if (ASenderMenu is TcxGridStdFooterMenu) and <GridView>.DataController.DataModeController.GridMode then AllowPopup := False; end; ============================================================== 主從表任何時候只能展開一個組 procedure TForm1.ADetailDataControllerCollapsing( ADataController: TcxCustomDataController; ARecordIndex: Integer; var AAllow: Boolean); var I: Integer; C: Integer; begin AAllow := False; C := 0; for I := 0 to ADataController.RecordCount - 1 do begin if ADataController.GetDetailExpanding(I) then Inc(C); if C > 1 then AAllow := True; end; end; procedure TForm1.ADetailDataControllerExpanding( ADataController: TcxCustomDataController; ARecordIndex: Integer; var AAllow: Boolean); begin ADataController.CollapseDetails; end; procedure TForm1.FormCreate(Sender: TObject); begin cxGrid1DBTableView1.DataController.OnDetailExpanding := ADetailDataControllerExpanding; cxGrid1DBTableView1.DataController.OnDetailCollapsing := ADetailDataControllerCollapsing; end; ================================================================= 動態創建層次(Level)和視圖(View) var Grid: TcxGrid; Level: TcxGridLevel; View: TcxGridDBTableView; begin // Creates a Grid instance Grid := TcxGrid.Create(SomeOwner); Grid.Parent := SomeParent; // Creates a Level Level := Grid.Levels.Add; Level.Name := ‘SomeLevelName‘; // Creates a View View := Grid.CreateView(TcxGridDBTableView) as TcxGridDBTableView; View.Name := ‘SomeViewName‘; // … and binds it to the Level Level.GridView := View; // Hooks up the View to the data View.DataController.DataSource := SomeDataSource; // … and creates all columns View.DataController.CreateAllItems; end; 此樓回復Re: -------------------------------------------------------------------------------- ====================================================================== 獲得Group Footer合計行對應的記錄 procedure TForm1.cxGrid1DBTableView1CustomDrawFooterCell( Sender: TcxGridTableView; ACanvas: TcxCanvas; AViewInfo: TcxGridColumnHeaderViewInfo; var ADone: Boolean); var ALevel, ADataGroupIndex: Integer; AGridRecord, AGroupRecord: TcxCustomGridRecord; begin if AViewInfo is TcxGridRowFooterCellViewInfo and // Row footer (TcxGridDBColumn(AViewInfo.Column).DataBinding.FieldName = ‘Area‘) then // Area column begin AGridRecord := TcxGridRowFooterCellViewInfo(AViewInfo).GridRecord; ALevel := TcxGridRowFooterCellViewInfo(AViewInfo).Container.GroupLevel; ADataGroupIndex := Sender.DataController.Groups.DataGroupIndexByRowIndex[AGridRecord.Index]; if ADataGroupIndex <> -1 then begin AGroupRecord := AGridRecord; while AGroupRecord.Level <> ALevel do AGroupRecord := AGroupRecord.ParentRecord; AViewInfo.Text := AGroupRecord.DisplayTexts[0]; end; end; end; =========================================================================== 訪問過濾之後的記錄 var I: Integer; begin Memo1.Lines.Clear; with cxGrid1DBTableView1.DataController do for I := 0 to FilteredRecordCount - 1 do Memo1.Lines.Add(DisplayTexts[FilteredRecordIndex[I], 0]); end; ============================================================================ 獲得單元的Font cxGrid1DBTableView1.ViewInfo.RecordsViewInfo.Items[1].GetCellViewInfoByItem( cxGrid1DBTableView1Company).EditViewInfo.Font; ============================================================================ 根據Level名稱找到Level對象 function GetLevelByName(AGrid: TcxGrid; ALevelName: string): TcxGridLevel; function LoopThroughLevels(ALevel: TcxGridLevel; ALevelName: string): TcxGridLevel; var I: Integer; begin Result := nil; for I := 0 to ALevel.Count - 1 do begin if ALevel[I].Name = ALevelName then begin Result := ALevel[I]; Exit; end; if ALevel[I].Count > 0 then begin Result := LoopThroughLevels(ALevel[I], ALevelName); if Result <> nil then Exit; end; end; end; var I: Integer; begin Result := nil; for I := 0 to AGrid.Levels.Count - 1 do begin if AGrid.Levels[I].Name = ALevelName then begin Result := AGrid.Levels[I]; Exit; end; if AGrid.Levels[I].Count > 0 then begin Result := LoopThroughLevels(AGrid.Levels[I], ALevelName); if Result <> nil then Exit; end; end; end; ============================================================================ 指定Filter Builder打開/保存過濾文件的默認路徑 uses ..., cxFilterControlDialog; procedure TForm.GridView1FilterControlDialogShow( Sender: TObject); begin TfmFilterControlDialog(Sender).OpenDialog.InitialDir := ‘D:\‘ end; ============================================================================ 保存/恢復帶匯總行的布局 <TableView>.StoreToIniFile(‘c:\Grid.ini‘, True, [gsoUseSummary]); <GridView>.RestoreFromIniFile(<inifilename>,True,False {or True, optional},[gsoUseSummary]); ============================================================================ 取消過濾時移到第一行 uses cxCustomData; procedure TYour_Form.AViewDataControllerFilterChanged(Sender: TObject); var Filter: TcxDataFilterCriteria; begin with Sender as TcxDataFilterCriteria do if IsEmpty then DataController.FocusedRowIndex := 0; end; ============================================================================= 排序後移到第一行 可以設置DataController.Options.FocusTopRowAfterSorting := True,也可以使用如下的代碼: uses cxCustomData; procedure TYour_Form.Your_ViewDataControllerSortingChanged(Sender: TObject); begin TcxCustomDataController(Sender).FocusedRowIndex := 0; end; ============================================================================== 判斷當前行是否第一行或最後一行 可以使用DataController的IsBOF, IsEOF方法,或者: <AView>.Controller.Controller.FocusedRow.IsFirst <AView>.Controller.Controller.FocusedRow.IsLast ============================================================================== 根據指定值查找記錄 DataController提供了好幾個方法來得到指定值對應的RecordIndex 對於Bound View可以使用FindRecordIndexByKeyValue方法 =============================================================================== 編輯和顯示Blob字段 該字段的Properties設置為BlobEdit,並將BlobPaintStyle 屬性設為 bpsText =============================================================================== 得到可見行數 <View>.ViewInfo.VisibleRecordCount =============================================================================== 保存後的行設置為當前行 const CM_SETFOCUSEDRECORD = WM_USER + 1002; type TForm1 = class(TForm) cxGrid1DBTableView1: TcxGridDBTableView; cxGrid1Level1: TcxGridLevel; cxGrid1: TcxGrid; dxMemData1: TdxMemData; dxMemData1Field1: TStringField; dxMemData1Field2: TIntegerField; DataSource1: TDataSource; cxGrid1DBTableView1RecId: TcxGridDBColumn; cxGrid1DBTableView1Field1: TcxGridDBColumn; cxGrid1DBTableView1Field2: TcxGridDBColumn; Timer1: TTimer; CheckBox1: TCheckBox; procedure Timer1Timer(Sender: TObject); procedure dxMemData1AfterPost(DataSet: TDataSet); procedure CheckBox1Click(Sender: TObject); private procedure CMSetFocusedRecord(var Msg: TMessage); message CM_SETFOCUSEDRECORD; public { Public declarations } end; var Form1: TForm1; FocusedIdx: Integer; implementation {$R *.dfm} procedure TForm1.Timer1Timer(Sender: TObject); begin dxMemData1.AppendRecord([‘‘, IntToStr(Random(1000)), Random(1000)]); end; procedure TForm1.dxMemData1AfterPost(DataSet: TDataSet); begin PostMessage(Handle, CM_SETFOCUSEDRECORD, Integer(cxGrid1DBTableView1), MakeLParam(cxGrid1DBTableView1.Controller.FocusedRowIndex, cxGrid1DBTableView1.Controller.TopRowIndex)); end; procedure TForm1.CMSetFocusedRecord(var Msg: TMessage); begin TcxGridDBTableView(msg.WParam).Controller.FocusedRowIndex := Msg.LParamLo; TcxGridDBTableView(msg.WParam).Controller.TopRowIndex := Msg.LParamHi; end; procedure TForm1.CheckBox1Click(Sender: TObject); begin Timer1.Enabled := TCheckBox(Sender).Checked; end; end. ================================================================================= 刪除記錄並獲得焦點 procedure TForm1.BtnDeleteClick(Sender: TObject); var FocusedRow, TopRow: Integer; View: TcxGridTableView; DataController: TcxGridDataController; begin View := cxGrid1.FocusedView as TcxGridTableView; DataController := View.DataController; // Remember the top row (the vertical scrollbar position) TopRow := View.Controller.TopRowIndex; // Remember the focused row(!) index FocusedRow := DataController.FocusedRowIndex; DataController.DeleteFocused; // After deletion the same row must be focused, // although it will correspond to a different data record DataController.FocusedRowIndex := FocusedRow; // Restore the top row View.Controller.TopRowIndex := TopRow; end; //======================================================================================= 數據庫中的財務表為: ID 收支類型 金額 其它屬性 其中收支類型只有兩種值:0 表示收入,1 表示支出 ;金額都是正數。 設置cxGrid的Footer 可以使得在顯示時,列表的下方出現匯總行:“金額”的和 同樣設置Default For Groups可以使得在用戶拖動表頭屬性實現分組時,顯示組內的匯總行:“金額”的和。 上面說的,用過cxGrid應該都會,下面就有這麽一個問題 如果我想使匯總行的值變為如下的值應該怎樣實現: 收支類型為0的金額的和 - 收支類型為1的金額的和 實現Footer的功能好辦,因為它的值不會變,自己用循環寫一個就完了,但是Default For Groups的功能就不好說了,因為它的值是根據用戶拖動的屬性計算的,而且還有可能是多層分組,想不出來了,所有到這來問 是不是要設置什麽屬性?或者cxGrid根本就沒這個功能,那該用什麽方法解決?希望哪位幫我解決,謝謝了先! 給你一個例子,可能對你有幫助, with tvOrders.DataController.Summary do begin BeginUpdate; try SummaryGroups.Clear; //The first summary group with SummaryGroups.Add do begin //Add proposed grouping column(s) TcxGridTableSummaryGroupItemLink(Links.Add).Column := tvOrdersCustomerID; //Add summary items with SummaryItems.Add as TcxGridDBTableSummaryItem do begin Column := tvOrdersPaymentAmount; Kind := skSum; Format := ‘Amount Paid: $,0‘; end; with SummaryItems.Add as TcxGridDBTableSummaryItem do begin Column := tvOrdersPaymentAmount; Kind := skCount; Format := ‘Records: 0‘; end; end; //The second summary group with SummaryGroups.Add do begin //Add proposed grouping column(s) TcxGridTableSummaryGroupItemLink(Links.Add).Column := tvOrdersProductID; //Add summary items with SummaryItems.Add as TcxGridDBTableSummaryItem do begin Column := tvOrdersQuantity; Kind := skSum; Position := spFooter; Format := ‘TOTAL = 0‘; end; with SummaryItems.Add as TcxGridDBTableSummaryItem do begin Column := tvOrdersPurchaseDate; Kind := skMin; Position := spFooter; end; end; finally EndUpdate; end; end; 2007-7-19 12:56:41 go on 訂單號 商品名 單價 數量 金額 001 aa 11.00 2 22.00 001 bb 2.00 2 4.00 001 cc 3.00 3 9.00 ----------------------合計 7 35.00 002 ee 11.00 2 22.00 002 bb 3.00 2 6.00 002 cc 3.00 3 9.00 ----------------------合計 7 37.00 總計14 72.00 每個單號分一個小結,能實現嗎? 最後在底下實現總的合計
 

cxGrid用法-最新