DEV GridControl小结
1、 如何解决单击记录整行选中的问题
View->OptionsBehavior->EditorShowMode 设置为：Click
2、 如何新增一条记录
(1)、gridView.AddNewRow()
(2)、实现 gridView_InitNewRow 事件
3、如何解决 GridControl 记录能获取而没有显示出来的问题
gridView.populateColumns();
4、如何让行只能选择而不能编辑（或编辑某一单元格）
(1)、View->OptionsBehavior->EditorShowMode 设置为：Click
(2)、View->OptionsBehavior->Editable 设置为：false
5、如何禁用 GridControl 中单击列弹出右键菜单
设置 Run Design->OptionsMenu->EnableColumnMenu 设置为：false
6、如何隐藏 GridControl 的 GroupPanel 表头
设置 Run Design->OptionsView->ShowGroupPanel 设置为：false
7、如何禁用 GridControl 中列头的过滤器 过滤器如下图所示：
设置 Run Design->OptionsCustomization->AllowFilter 设置为：false
8、如何在查询得到 0 条记录时显示自定义的字符提示/显示 如图所示：
方法如下：
//When no Records Are Being Displayed
private void gridView1_CustomDrawEmptyForeground(object sender, CustomDrawEventArgs e)
{
//方法一（此方法为GridView设置了数据源绑定时，可用）
ColumnView columnView = sender as ColumnView;
BindingSource bindingSource = this.gridView1.DataSource as BindingSource;
if(bindingSource.Count == 0)
{
string str = "没有查询到你所想要的数据!";
Font f = new Font("宋体", 10, FontStyle.Bold);
Rectangle r = new Rectangle(e.Bounds.Top + 5, e.Bounds.Left + 5, e.Bounds.Right - 5, e.Bounds.Height - 5);
e.Graphics.DrawString(str, f, Brushes.Black, r); }
//方法二（此方法为GridView没有设置数据源绑定时，使用，一般使用此种方 法）
if (this._flag)
{ if (this.gridView1.RowCount == 0)
{ string str = "没有查询到你所想要的数据!"; Font f = new Font("宋体", 10, FontStyle.Bold);
Rectangle r = new Rectangle(e.Bounds.Left + 5, e.Bounds.Top + 5, e.Bounds.Width - 5, e.Bounds.Height - 5);
e.Graphics.DrawString(str, f, Brushes.Black, r); } } }
9、如何显示水平滚动条？或
设置 this.gridView.OptionsView.ColumnAutoWidth = false;
.....列表宽度自适应内容
gridview1.BestFitColumns();
10、如何定位到第一条数据/记录？
设置 this.gridView.MoveFirst()
11、如何定位到下一条数据/记录？ 设置 this.gridView.MoveNext()
12、如何定位到最后一条数据/记录？
设置 this.gridView.MoveLast()
13、设置成一次选择一行，并且不能被编辑
this.gridView1.FocusRectStyle = DevExpress.XtraGrid.Views.Grid.DrawFocusRectStyle.RowFocus;
this.gridView1.OptionsBehavior.Editable = false;
this.gridView1.OptionsSelection.EnableAppearanceFocusedCell = false;
14、如何显示行号？ private void gvPayList_CustomDrawRowIndicator(object sender, DevExpress.XtraGrid.Views.Grid.RowIndicatorCustomDrawEventArgs e) { e.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Far; if (e.Info.IsRowIndicator) { if (e.RowHandle >= 0) { e.Info.DisplayText = (e.RowHandle + 1).ToString(); } else if (e.RowHandle < 0 && e.RowHandle > -1000) { e.Info.Appearance.BackColor = System.Drawing.Color.AntiqueWhite; e.Info.DisplayText = "G" + e.RowHandle.ToString(); } } }
15、如何让各列头禁止移动？
设置 gridView1.OptionsCustomization.AllowColumnMoving = false;
16、如何让各列头禁止排序？
设置 gridView1.OptionsCustomization.AllowSort = false;
17、如何禁止各列头改变列宽？
设置 gridView1.OptionsCustomization.AllowColumnResizing = false;
18.拖动滚动条时固定某一列
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设置Columns，选择要固定的列。设置Fixed属性，可以选择：固定在左边、固定在右边、不固定。
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19.获取选定行,指定列单元格的内容
return gridView1.GetRowCellValue(pRows[0], ColumName).ToString ();
20.分组显示
OptionsView>OptionsBehavior>AutoExpandAllGroups = True 选择要分组的列，将GroupIndex属性设置为0
21.格式化数据
private void gvList_ValidatingEditor(object sender, DevExpress.XtraEditors.Controls.BaseContainerValidateEditorEventArgs e) { if (this.gvList.FocusedColumn.FieldName == "passQty") { string passQty = e.Value.ToString().Trim(); int receiveQty = orderDetailList[this.gvList.FocusedRowHandle].qty; if (!JXType.IsIntBigThanZero(passQty)) { e.Valid = false; e.ErrorText = "合格数量必须为大于等于0小于等于接货数量的整数！"; } else { if (int.Parse(passQty) > receiveQty) { e.Valid = false; e.ErrorText = "合格数量必须为大于0小于等于接货数量的整数！"; } } }
}
22.合并表头
///初始化表格
using DevExpress.XtraGrid.Columns; using DevExpress.XtraGrid.Views.Base; using DevExpress.XtraGrid.Views.BandedGrid; using DevExpress.XtraEditors.Repository; private void InitGrid() { // advBandedGridView1是表格上的默认视图，注意这里声明的是：BandedGridView BandedGridView view = advBandedGridView1 as BandedGridView; view.BeginUpdate(); //开始视图的编辑，防止触发其他事件 view.BeginDataUpdate(); //开始数据的编辑 view.Bands.Clear();
view.OptionsView.ShowColumnHeaders = false; //因为有Band列了，所以把ColumnHeader隐藏 //添加列标题 //添加列标题
GridBand bandID = view.Bands.AddBand("ID"); bandID.Visible =false; //隐藏ID列
GridBand bandName = view.Bands.AddBand("姓名"); GridBand bandSex = view.Bands.AddBand("性别"); GridBand bandBirth = view.Bands.AddBand("出生日期"); GridBand bandScore = view.Bands.AddBand("分数"); GridBand bandMath = bandScore.Children.AddBand("数学"); GridBand bandChinese = bandScore.Children.AddBand("语文"); GridBand bandEnglish = bandScore.Children.AddBand("英语"); GridBand bandSubTotal = bandScore.Children.AddBand("小计"); GridBand bandRemark = view.Bands.AddBand("备注");
bandFile.AppearanceHeader.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center;//这是合并表头居中显示 view.EndDataUpdate();//结束数据的编辑 view.EndUpdate(); //结束视图的编辑 }
具体可看
dev gridcontrol 合并表头
23. //动态添加列 DevExpress.XtraGrid.Columns.GridColumn Col1 = new DevExpress.XtraGrid.Columns.GridColumn(); Col1.FieldName = "name"; Col1.Caption = "名字"; Col1.Visible = false; Col1.VisibleIndex = gvCountry.Columns.Count; gvCountry.Columns.Add(Col1);
24。设置自动增加的行号
private void gridview_CustomDrawRowIndicator(object sender, DevExpress.XtraGrid.Views.Grid.RowIndicatorCustomDrawEventArgs e) {
e.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Far; if (e.Info.IsRowIndicator) { if (e.RowHandle >= 0) { e.Info.DisplayText = (e.RowHandle + 1).ToString(); } else if (e.RowHandle < 0 && e.RowHandle > -1000) { e.Info.Appearance.BackColor = System.Drawing.Color.AntiqueWhite; e.Info.DisplayText = "G" + e.RowHandle.ToString(); } }
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25.特效：gridcontrol中有5种view 型式，普通的是gridview，然后分别为cardview、BandedView、Advanced BandedView、LayoutView；共5种。
1）、view组中把OptionView下的viewmode 设置成“Carousel”就达到这种“旋转木马”式的gridcontrol view 特效了 2）、layoutView1.OptionsCarouselMode.PitchAngle 这个属性决定“旋转木马”的pitch angle 螺距角; 螺旋角; 螺旋升角; 俯仰角; 倾角; 节锥半角 3）、Roll Angle 属性决定着 倾侧角度 4）、指定数据源，显示数据： //显示数据 private void showData(List<Employee > list) { DataTable dt = new DataTable("OneEmployee"); dt.Columns.Add("Caption", System.Type.GetType("System.String")); dt.Columns.Add("Department", System.Type.GetType("System.String")); dt.Columns.Add("PhotoName", System.Type.GetType("System.Byte[]"));
for (int i = 0; i < list.Count; i++) { DataRow dr = dt.NewRow(); dr["Caption"] = list[i].Name; dr["Department"] = list[i].Department; string imagePath = @"D:\C#\photos\" + list[i].PhotoPath; dr["PhotoName"] = getImageByte(imagePath); dt.Rows.Add(dr); } gridControl1.DataSource = dt; }
//返回图片的字节流byte[] private byte[] getImageByte(string imagePath) { FileStream files = new FileStream(imagePath, FileMode.Open); byte[] imgByte = new byte [files.Length ]; files.Read(imgByte, 0, imgByte.Length); files.Close(); return imgByte; }
26.检查数据的有效性
在gridview的ValidateRow事件中加入检查代码： #region 检查数据 private void gridView1_ValidateRow(object sender, ValidateRowEventArgs e) { GridView view = sender as GridView; view.ClearColumnErrors();
if (view.GetRowCellValue(e.RowHandle, "ReceiveDate") == DBNull.Value) { e.Valid = false; view.SetColumnError(view.Columns["ReceiveDate"], "必须指定日期"); }
}
27.设某一列文字和标题局中显示 gridView1.Columns[0].AppearanceHeader.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center; gridView1.Columns[0].AppearanceCell.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Center;
28.列表过滤条件多选
列名.OptionsFilter.FilterPopupMode= DevExpress.XtraGrid.Columns.FilterPopupMode.CheckedList
29.隔行换色的方法
this.gridView1.Appearance.OddRow.BackColor = Color.White; // 设置奇数行颜色 // 默认也是白色 可以省略 this.gridView1.OptionsView.EnableAppearanceOddRow = true; // 使能 // 和和上面绑定 同时使用有效 this.gridView1.Appearance.EvenRow.BackColor = Color.WhiteSmoke; // 设置偶数行颜色 this.gridView1.OptionsView.EnableAppearanceEvenRow = true; // 使能 // 和和上面绑定 同时使用有效
