技巧二：在内置右键菜单的后面增加菜单项
首先应在Form上加一个cxGridPopupMenu控件 以启用右键菜单
UseBuildInPopupMenus设为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; //第一个内置右键菜单(表头菜单)
if Assigned(AMenu) and AMenu.InheritsFrom(TPopupMenu) then
begin
TPopupMenu(AMenu).AutoHotkeys := maManual; //手动热键
//-------------------------
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Caption := '-';
FMenuItem.Name := 'miLineForGroup';
TPopupMenu(AMenu).Items.Add(FMenuItem);
//展开所有组
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Name := 'miExpandAllGroup';
FMenuItem.Caption := '展开所有组(&X)';
FMenuItem.OnClick := miExpandAllGroupClick;
TPopupMenu(AMenu).Items.Add(FMenuItem);
//收缩所有组
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Name := 'miCollapseAllGroup';
FMenuItem.Caption := '收缩所有组(&O)';
FMenuItem.OnClick := miCollapseAllGroupClick;
TPopupMenu(AMenu).Items.Add(FMenuItem);
//-------------------------
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Caption := '-';
TPopupMenu(AMenu).Items.Add(FMenuItem);
//过滤面板
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Name := 'miFilterPanel';
FMenuItem.Caption := '过滤面板(&P)';
//自动显示
FSubMenuItem := TMenuItem.Create(Self);
FSubMenuItem.Name := 'miFilterPanelAuto';
FSubMenuItem.Caption := '自动(&A)';
FSubMenuItem.RadioItem := True;
FSubMenuItem.GroupIndex := 5; //指定同一组
FSubMenuItem.Checked := True;
FSubMenuItem.OnClick := miFilterPanelClick;
FMenuItem.Add(FSubMenuItem); //加入二级子菜单
//总是显示
FSubMenuItem := TMenuItem.Create(Self);
FSubMenuItem.Name := 'miFilterPanelAlways';
FSubMenuItem.Caption := '总是显示(&W)';
FSubMenuItem.RadioItem := True;
FSubMenuItem.GroupIndex := 5;
FSubMenuItem.OnClick := miFilterPanelClick;
FMenuItem.Add(FSubMenuItem);
//从不显示
FSubMenuItem := TMenuItem.Create(Self);
FSubMenuItem.Name := 'miFilterPanelNerver';
FSubMenuItem.Caption := '从不显示(&N)';
FSubMenuItem.RadioItem := True;
FSubMenuItem.GroupIndex := 5;
FSubMenuItem.OnClick := miFilterPanelClick;
FMenuItem.Add(FSubMenuItem);
TPopupMenu(AMenu).Items.Add(FMenuItem);
//自定义过滤
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Name := 'miCustomFilter';
FMenuItem.Caption := '自定义过滤(&M)';
FMenuItem.OnClick := miCustomFilterClick;
TPopupMenu(AMenu).Items.Add(FMenuItem);
//过滤管理器
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Name := 'miFilterBuilder';
TPopupMenu(AMenu).Images.AddImage(FormMain.ImageListExtend, 44); //添加图标图像
FMenuItem.ImageIndex := TPopupMenu(AMenu).Images.Count - 1; //指定图标序号
FMenuItem.Caption := '过滤管理器';
FMenuItem.OnClick := Self.miFilterBuilderClick;
TPopupMenu(AMenu).Items.Add(FMenuItem);
//---------------------
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Caption := '-';
TPopupMenu(AMenu).Items.Add(FMenuItem);
//导出
FMenuItem := TMenuItem.Create(Self);
FMenuItem.Name := 'miExport';
TPopupMenu(AMenu).Images.AddImage(FormMain.ImageListExtend, 37);
FMenuItem.ImageIndex := TPopupMenu(AMenu).Images.Count - 1;
FMenuItem.Caption := '导出(&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 := '没有导出数据...';
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|网页文件 (*.html)|*.html';
Self.SaveDialogExport.Title := '导出为';
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 := '不支持的导出文件类型...';
Application.MessageBox(PChar(msg), PChar(Application.Title),
MB_OK or MB_IconError);
Exit;
end;
msg := '导出完成...';
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 //右击列标题时
begin
//if tvResult.DataController.Groups.GroupingItemCount > 0 then
if tvResult.GroupedColumnCount > 0 then //有分组时显示
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
//过滤管理器
//弹出Filter Builder Dialog对话框
tvResult.Filtering.RunCustomizeDialog;
end;
procedure TFormItemList.miCustomFilterClick(Sender: TObject);
var
AHitTest: TcxCustomGridHitTest;
begin
//自定义过滤
//弹出Custom Filter Dialog对话框
AHitTest := cxGridPopupMenu.HitTest;
if GetHitTypeByHitCode(AHitTest.HitTestCode) = gvhtColumnHeader then //获得右击的列
tvResult.Filtering.RunCustomizeDialog(TcxGridColumnHeaderHitTest(AHitTest).Column);
end;
procedure TFormItemList.miFilterPanelClick(Sender: TObject);
var
mi: TMenuItem;
begin
//隐藏/显示过滤面板
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
//展开所有组
tvResult.DataController.Groups.FullExpand;
end;
procedure TFormItemList.miCollapseAllGroupClick(Sender: TObject);
begin
//收缩所有组
tvResult.DataController.Groups.FullCollapse;
end;
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在用，留名
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技巧三 按条件计算合计值
在Footer的第一列显示[合计:]
加一个Summary项,Column设为Grid的第一列,Kind设为skNone
在该Summary项的OnGetText事件中,输入:
procedure TFormExpense.tvExpenseTcxGridDBDataControllerTcxDataSummaryFooterSummaryItems2GetText(
Sender: TcxDataSummaryItem; const AValue: Variant; AIsFooter: Boolean;
var AText: String);
begin
AText := '合计:';
end;
按条件汇总:
在TableView的DataController->Summary->FooterSummary->OnSummary事件中,输入:
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) //只统计Level列=1的值
and (TcxDBDataSummaryItem(Arguments.SummaryItem).Kind = skSum) then
OutArguments.Value := 0; //Level > 1的统计值设为0
end;
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借贵地一用,问个CXGrid问题,在cxgrid中如何使一些行不能编辑,如:字段isenable = false的行
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楼上的问题
请参考下面的技巧
技巧四:根据某列的值设定其它列的可编辑性
procedure TFormUser.tvUserEditing(Sender: TcxCustomGridTableView;
AItem: TcxCustomGridTableItem; var AAllow: Boolean);
begin
//如果第三列值为True,则第4列不能修改
if (tvUser.Controller.FocusedRecord.Values[2] = True) and (AItem.Index = 4) then
AAllow := False
else
AAllow := True;
end;
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技巧五:保存/恢复Grid布局
//恢复布局
IniFileName := ExtractFilePath(Application.ExeName) + 'Layout\' + Self.Name + '.ini';
if FileExists(IniFileName) then
Self.tvResult.RestoreFromIniFile(IniFileName) //从布局文件中恢复
else
begin
Self.tvResult.BeginUpdate;
for i := 0 to Self.tvResult.ItemCount - 1 do
Self.tvResult.Items[i].ApplyBestFit; //调整为最佳宽度
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); //保存为布局文件
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借用地问一下：在 cxgrid中，如果我同时选中主表与子表中的记录，怎么样能同时进行对其所选记录进行处理呢。
我现在只能判断 焦点是在主表还是从表中，然后只能对主表或子表中的数据进行处理。
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看来用cxGrid人不多啊
再多贴一些技巧,需要的朋友顶一下
==========================================================================
在主从TableView中根据主TableView得到对应的从TableView
var
ADetailDC: TcxGridDataController;
AView: TcxCustomGridTableView;
begin
with cxGrid1DBTableView1.DataController do
ADetailDC := TcxGridDataController(GetDetailDataController(FocusedRecordIndex, 0));
AView := ADetailDC.GridView;
end;
==============================================================================
定位在第一行并显示内置编辑器
cxDBVerticalGrid1.FocusedRow := cxDBVerticalGrid1.Rows[0];
cxDBVerticalGrid1.ShowEdit;
==============================================================================
隐藏 "<No data to display>" 字符串
该文本存储在scxGridNoDataInfoText资源字符串,可以将该资源字符串的内容设为空
来隐藏该文本。
uses cxClasses, cxGridStrs;
...
cxSetResourceString(@scxGridNoDataInfoText, '');
//如果"<No data to display>" 字符串已经显示，需要调用：
<View>.LayoutChanged;
============================================================
删除应用过滤后的行
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;
=============================================================
根据单元的值设置样式
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];
===================================================================
动态生成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;
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======================================================================
当底层数据集为空时显示一条空记录
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;
=======================================================================
在当前View插入记录
使用FocusedView属性得到当前焦点View，用View.DataController得到对应的Data Controller，
之后使用Data Controller的方法来操作数据：
- 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;
另外一种方法是使用View.DataController.DataSource.DataSet得到底层数据集后，再用数据集的
方法来操作数据。