设计数据源并绑定字段:
数据源可以是实现下列接口之一的任何类型:
- IList 接口,包括一维数组。List<T>等!
- IListSource 接口,例如,DataTable 和 DataSet 类。
- IBindingList 接口,例如,BindingList 类。
- IBindingListView 接口,例如,BindingSource 类。
修改也是同步的
DataTable dataTable = new DataTable(); dataTable.Columns.Add("Name", System.Type.GetType("System.String")); dataTable.Columns.Add("Sex", System.Type.GetType("System.String")); dataTable.Columns.Add("Age", System.Type.GetType("System.String")); DataRow row = dt.NewRow(); ; row["Name"] = "mathilda"; row["Sex"] = "loli"; row["Age"] = "12"; dataTable.Rows.Add(row); // 绑定字段 gridView1.Columns[1].FieldName = "Sex"; gridView1.Columns[2].FieldName = "Age"; gridView1.Columns[0].FieldName = "Name"; gridControl1.DataSource = dataTable;
根据数据源自动产生列
gridView2.PopulateColumns();
表格数据与数据源的数据同步
XtraGrid与Windows自带的DataGridView在数据源方面不同的是,对grid里的数据进行任何改动(增、删、改)之后,原本的数据源也相应的改动。通过下面例子可以得出此结论,在窗体添加删,改两个按钮并绑定下面相应的事件。
/// <summary> /// 更改 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btEdit_Click(object sender, EventArgs e) { Person p = (Person)gridView1.GetRow(gridView1.FocusedRowHandle); } /// <summary> /// 删除 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btDelete_Click(object sender, EventArgs e) { if (gridView1.SelectedRowsCount != 0) gridView1.DeleteSelectedRows(); MessageBox.Show(people.Count.ToString()); }
只要对grid的数据经过改动之后,单击相应的按钮就可以查看数据源的信息。
新增一条记录,添加行
(1)、gridView.AddNewRow()、gridView.UpdateCurrentRow()
数据源DataSource如果是DataTable可以用AddNewRow方法,然后UpdateCurrentRow。
但是如果DataSource的来源是List<T>,用AddNewRow是不起作用的,这时候需要将List<T>转换为BindingList<T>,才可以采用AddNewRow。
然后使用gridView.UpdateCurrentRow()将更改同步到数据源DataTable或BindingList中。
(2)、实现 gridView_InitNewRow 事件
删除选中行
删除选中行, 可通过DeleteSelectedRows()方法,
然后使用gridView.UpdateCurrentRow()将更改同步到数据源DataTable或BindingList中。
具体示例代码如下:
if (gridView1.SelectedRowsCount > 0) { gridView1.DeleteSelectedRows(); gridView.UpdateCurrentRow() }
获取选定行,指定列单元格的内容
gridView1.GetRowCellValue(pRows[0], ColumName).ToString ();
选择某行后获取当前表格数据:
this.textBox1.Text = gridView2.GetDataRow(e.RowHandle)["列名"].ToString();
Get/Set 单元格的值
通过调用GetRowCellValue获取单元格的值。
public override object GetRowCellValue(int rowHandle, GridColumn column);
rowHandle是行的索引,column列的对象。
通过调用SetRowCellValue设置单元格的值
public void SetRowCellValue(int rowHandle, GridColumn column, object _value);
rowHandle是行的索引,column列的对象。_value是单元格新的值。
以peopleList为例
int englishS=Convert.ToDouble(0,gridView1.Columns["English"])+60; SetRowCellValue(0,gridView1.Columns["English"],englishS);
在XtraGrid有另一种方式,就是直接设置数据源的值。对于上面这个例子,直接找到grid里第一行数据对应的Person对象,设置它的English值。
选中行改变绑定行数据到对应控件中
1、判断是否有Focused行
if (gridView1.IsValidRowHandle(gridView1.FocusedRowHandle))
2、获取Focused行
1、绑定的是数据行:
DataRow Row = gridView1.GetFocusedDataRow();
2、绑定的是实体:
**Entity entity = gridView1.GetFocusedRow() as **Entity;
3、获取Focused行单元格的值
string Code = gridView1.GetFocusedRowCellValue("Code").ToString(); string Code = gridView1.GetRowCellValue(e.FocusedRowHandle, "Code")
FocusedRowChanged事件:
if (bandedGridView1.GetFocusedDataRow() == null) return;//判断当前选中行是否为null //返回值 var columnValue= bandedGridView1.GetFocusedRowCellValue("绑定列字段名称").ToString();
动态添加列
// 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);
添加非绑定列
下面的例子主要演示如何为gird网格添加一个非绑定列,从而显示根据 Quantity*UnitPrice*(1-Discount)公式计算出来的每个订单的金额。
private void Form1_Load(object sender, System.EventArgs e) { // ... gridControl1.ForceInitialize(); // Create an unbound column. GridColumn unbColumn = gridView1.Columns.AddField("Total"); unbColumn.VisibleIndex = gridView1.Columns.Count; unbColumn.UnboundType = DevExpress.Data.UnboundColumnType.Decimal; // Disable editing. unbColumn.OptionsColumn.AllowEdit = false; // Specify format settings. unbColumn.DisplayFormat.FormatType = DevExpress.Utils.FormatType.Numeric; unbColumn.DisplayFormat.FormatString = "c"; // Customize the appearance settings. unbColumn.AppearanceCell.BackColor = Color.LemonChiffon; } // Returns the total amount for a specific row. decimal getTotalValue(int listSourceRowIndex) { DataRow row = nwindDataSet.Tables["Order Details"].Rows[listSourceRowIndex]; decimal unitPrice = Convert.ToDecimal(row["UnitPrice"]); decimal quantity = Convert.ToDecimal(row["Quantity"]); decimal discount = Convert.ToDecimal(row["Discount"]); return unitPrice * quantity * (1 - discount); } // Provides data for the Total column. private void gridView1_CustomUnboundColumnData(object sender, CustomColumnDataEventArgs e) { if (e.Column.FieldName == "Total" && e.IsGetData) e.Value = getTotalValue(e.ListSourceRowIndex); }
编辑器
XtraGrid提供了多种编辑器。这些能够在Grid/CardView/BandedView中使用。在属性编辑器中的In-place Editor Repository可以对编辑器进行管理。在Columns的ColumnEdit中选择该列使用哪个编辑器。
也可以通过代码实现:
RepositoryItemComboBox repositoryItemComboBox_abc=new RepositoryItemComboBox(); // // 对编辑器进行设置 // this.gridColumn1.ColumnEdit = repositoryItemComboBox_abc; //在需要的列里使用定义好的编辑器
添加按钮列
把列的ColumnEdit属性设置为RepositoryItemButtonEdit
把TextEditStyle属性设置为HideTextEditor;
把Buttons的Kind属性设置为Glyph;
把Button的Caption用于设置文字
把Buttons的TextOption的HAlignment属性设置为Near;
如果要用到事件的话,还要注册事件。。。
在GridControl的设计器中Repository页中的In-place Editor Repository项中
在右边的Repository栏中找到你的ButtonEdit,选它的事件属性页,注册它的ButtonClick事件即可
数据验证
有两种方法来实现基于单元格的验证:
1、使用RepositoryItem.Validating事件
事件的"sender" 必须转换为BaseEdit类型,使用EditValue来获取当前输入的值并进行校验,如果校验不通过,把e.Cancel设置True。这种方法一般用来对内置控件的单元格进行数据验证。
private void TextEdit1_Validating(object sender, System.ComponentModel.CancelEventArgs e) { BaseEdit textEdit = sender as BaseEdit; if (textEdit.Text.ToString().Trim().Length == 0) { e.Cancel = true; //标识 错误提示 errorReason = 0; return; } else { //获取GridView中所有的选中的行号 //此处不允许多选,故只有一行 int[] iRowId = this.gViewActList.GetSelectedRows(); for (int i = 0; i < gViewActList.DataRowCount; i++) { //重复检验时,不验证当前行 if (i != iRowId[0]) { if (textEdit.EditValue.ToString().Trim() == gViewActList.GetDataRow(i)["GridView上绑定的列名"].ToString().Trim()) { e.Cancel = true; //标识 错误提示 errorReason = 1; return; } } } } }
跟据Validating事件中的标识,进行错误信息提示:
private void gViewActList_InvalidValueException(object sender, InvalidValueExceptionEventArgs e) { if (errorReason == 0) { e.ErrorText = "动作名称不允许为空!"; } else if (errorReason == 1) { e.ErrorText = "动作名称不允许为重复!"; } else { e.ErrorText = "值无效!"; } }
2、使用 GridView.ValidatingEditor 事件
事件的"sender"必须转换为GridView类型,当前列可以从GridView.FocusedColumn属性获得,值可以从e.Value获取,如果校验不通过,需要把e.Valid设置为False。这种方法一般用于对整个Grid内的文本框进行数据验证
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, 并且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, 并且小于等于接货数量的整数!"; } } } }
在设置完事件之后需要写一个GridView.InvalidValueException 的事件委托,如
private void gridView1_InvalidValueException(object sender, DevExpress.XtraGrid.Views.Base.InvalidValueExceptionEventArgs e) { e.ThrowException = false; e.WindowText = "验证通过"; e.DisplayError = true; }
3、使用 GridView.ValidateRow事件
在gridview的ValidateRow事件中加入数据校验代码:
#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, "Birthday") == DBNull.Value){ e.Valid = false; view.SetColumnError(view.Columns["Birthday"], "必须指定出生日期"); } }
添加CheckBox并支持多选操作.
OptionsSelection -> MultiSelect : True
MultiSelectMode : CheckBoxRowSelect
全选和反选
这是一个比较难的问题,这里我结合网上寻找的资料总结了一个实体类贴上源代码
//------------------------------------------------------------------------------------- // All Rights Reserved , Copyright (C) 2014 , ZTO , Ltd . //------------------------------------------------------------------------------------- using System.Drawing; using System.Windows.Forms; using DevExpress.XtraEditors.Repository; namespace ZTO.WayBill.Utilities { /// <summary> /// Dev GridControl 创建全选复选框 /// /// 修改纪录 /// /// 2014-5-30 版本:1.0 YangHengLian 创建主键,注意命名空间的排序。 /// /// 版本:1.0 /// /// <author> /// <name>YangHengLian</name> /// <date>2014-5-30</date> /// </author> /// </summary> public class DevControlHelper { /// <summary> /// 创建复选框 /// </summary> /// <param name="e"></param> /// <param name="chk"></param> public static void DrawCheckBox(DevExpress.XtraGrid.Views.Grid.ColumnHeaderCustomDrawEventArgs e, bool chk) { RepositoryItemCheckEdit repositoryCheck = e.Column.ColumnEdit as RepositoryItemCheckEdit; if (repositoryCheck != null) { Graphics g = e.Graphics; Rectangle r = e.Bounds; DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo info; DevExpress.XtraEditors.Drawing.CheckEditPainter painter; DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs args; info = repositoryCheck.CreateViewInfo() as DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo; painter = repositoryCheck.CreatePainter() as DevExpress.XtraEditors.Drawing.CheckEditPainter; info.EditValue = chk; info.Bounds = r; info.CalcViewInfo(g); args = new DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs(info, new DevExpress.Utils.Drawing.GraphicsCache(g), r); painter.Draw(args); args.Cache.Dispose(); } } /// <summary> /// 全选,反选 /// </summary> /// <param name="gridView"></param> /// <param name="fieldName"></param> /// <param name="currentStatus"></param> /// <returns></returns> public static bool ClickGridCheckBox(DevExpress.XtraGrid.Views.Grid.GridView gridView, string fieldName, bool currentStatus) { bool result = false; if (gridView != null) { gridView.ClearSorting();//禁止排序 gridView.PostEditor(); DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo info; Point pt = gridView.GridControl.PointToClient(Control.MousePosition); info = gridView.CalcHitInfo(pt); if (info.InColumn && info.Column != null && info.Column.FieldName == fieldName) { for (int i = 0; i < gridView.RowCount; i++) { gridView.SetRowCellValue(i, fieldName, !currentStatus); } return true; } } return result; } } }
下面是使用步骤
窗体加载事件添加一些代码
private bool _mCheckStatus; //GridControl全选,作为全局变量,默认false private void FrmInputBill_Load(object sender, EventArgs e) { bandedGridView1.OptionsBehavior.Editable = false; bandedGridView1.OptionsBehavior.ReadOnly = true; var col = new BandedGridColumn { FieldName = "Check", Visible = true, VisibleIndex = 0, ColumnEdit = new RepositoryItemCheckEdit() }; col.OptionsColumn.AllowEdit = true; //CheckBox可以编辑改变 gridBand1.Columns.Insert(0, col); bandedGridView1.Click += bandedGridView1_Click; bandedGridView1.CustomDrawColumnHeader += bandedGridView1_CustomDrawColumnHeader; bandedGridView1.DataSourceChanged += bandedGridView1_DataSourceChanged; //这里绑定数据源 } #region GridControl支持全选事件 private void bandedGridView1_Click(object sender, EventArgs e) { if (DevControlHelper.ClickGridCheckBox(this.bandedGridView1, "Check", _mCheckStatus)) { _mCheckStatus = !_mCheckStatus; } } private void bandedGridView1_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e) { if (e.Column != null && e.Column.FieldName == "Check") { e.Info.InnerElements.Clear(); e.Painter.DrawObject(e.Info); DevControlHelper.DrawCheckBox(e, _mCheckStatus); e.Handled = true; } } private void bandedGridView1_DataSourceChanged(object sender, EventArgs e) { GridColumn column = this.bandedGridView1.Columns.ColumnByFieldName("Check"); if (column != null) { column.Width = 40; column.OptionsColumn.ShowCaption = false; column.ColumnEdit = new RepositoryItemCheckEdit(); } } #endregion
重绘单元格或者行的显示,使用CustomDrawCell()事件
通过在Appearence中添加FormatCondition,设置应用与整行,还是单一个单元格,使用CustomDrawCell事件。
void gridView1_CustomDrawCell(object sender, DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs e) { var currentView = sender as GridView; if (currentView != null && e.RowHandle == currentView.FocusedRowHandle) return; Rectangle r = e.Bounds; if (e.Column.FieldName == "F_State") { if (e.CellValue.ToString().Equals("False")) { e.Appearance.ForeColor = Color.Red; e.Appearance.DrawString(e.Cache, e.DisplayText, r); e.Handled = true; } } }
数据导入导出
原文:Export to XLS and XLSX Formats | WinForms Controls | DevExpress Documentation
XtraGrid 支持Html、Xml、Txt、Xsl导出,对应的导出器是ExportHtmlProvider、ExportXmlProvider、 ExportTxtProvider、ExportXslProvider。都在命名空间DevExpress.XtraExport里面。
这里封装了一个数据导出的方法,可以导出上述列举的类型,只需要传入相应类型的provider就可以了。
private void ExportTo(IExportProvider provider) { Cursor currentCursor = Cursor.Current; Cursor.Current = Cursors.WaitCursor; this.FindForm().Refresh(); BaseExportLink link = gridView1.CreateExportLink(provider); (link as GridViewExportLink).ExpandAll = false; link.ExportTo(true); provider.Dispose(); Cursor.Current = currentCursor; }
调用时只需要创建一个相应的provider。
IExportProvider provider = new ExportXlsProvider(FullFileName); //这里可以是ExportHtmlProvider、ExportXmlProvider、ExportTxtProvider ExportTo(provider);
也可以
string path = "output.xlsx"; //Customize export options (gridControl1.MainView as GridView).OptionsPrint.PrintHeader = false; XlsxExportOptionsEx advOptions = new XlsxExportOptionsEx(); advOptions.AllowGrouping = DevExpress.Utils.DefaultBoolean.False; advOptions.ShowTotalSummaries = DevExpress.Utils.DefaultBoolean.False; advOptions.SheetName = "Exported from Data Grid"; gridControl1.ExportToXlsx(path, advOptions); // Open the created XLSX file with the default application. Process.Start(path);
导入数据只尝试了导入Excel的导入,利用ODBC读取Excel的数据到DataTable中,再把DataTable绑定到XtraGrid中。这里也是封装了一个读取Excel数据的方法。
private DataSet GetDataFromExcelWithAppointSheetName(string Path) { String strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source=" + Path + ";" +"Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn); conn.Open(); //返回Excel的架构,包括各个sheet表的名称,类型,创建时间和修改时间等 DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" }); //包含excel中表名的字符串数组 string[] strTableNames = new string[dtSheetName.Rows.Count]; for (int k = 0; k < dtSheetName.Rows.Count; k++) { strTableNames[k] = dtSheetName.Rows[k]["TABLE_NAME"].ToString(); } OleDbDataAdapter da = null; DataSet ds = new DataSet(); //从指定的表明查询数据,可先把所有表明列出来供用户选择 string strExcel = "select * from[" + strTableNames[0] + "]"; da = new OleDbDataAdapter(strExcel, conn); da.Fill(ds); return ds; }
以这样方式调用。
DataSet ds = GetDataFromExcelWithAppointSheetName(FullFileName);
导出到PDF
一种方法:
using DevExpress.XtraPrinting; // Create a PrintingSystem component. DevExpress.XtraPrinting.PrintingSystem ps = new DevExpress.XtraPrinting.PrintingSystem(); // Create a link that will print a control. DevExpress.XtraPrinting.PrintableComponentLink link = new PrintableComponentLink(ps); // Specify the control to be printed. link.Component = gridControl1; // Generate a report. link.CreateDocument(); // Export the report to a PDF file. string filePath = @"c:\gridcontrol.pdf"; link.PrintingSystem.ExportToPdf(filePath); System.Diagnostics.Process process = new System.Diagnostics.Process(); process.StartInfo.FileName = filePath; process.Start();
二种:
DevExpress.XtraGrid.Views.Grid.GridView View = gridControl1.MainView as DevExpress.XtraGrid.Views.Grid.GridView; if (View != null) { View.OptionsPrint.ExpandAllDetails = true;//请注意,仅当GridOptionsPrint.PrintDetails属性设置为true时,此设置才有效。 View.ExportToPdf("MainViewData.pdf"); }
行双击事件的处理
要响应GridView的单击或者双击事件,要设置GridView的OptionsBehavior.Editable=false。如果为true,它是不会响应这这两个事件的。 它本的的机制就是这样。
//双击行弹出rowDetail信息 private void gridView1_MouseDown(object sender, MouseEventArgs e) { DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo hInfo = gridView1.CalcHitInfo(new Point(e.X,e.Y)); if (gridView1.RowCount > 0 && e.Button == MouseButtons.Left && e.Clicks == 2) { //判断光标是否在行范围内 if (hInfo.InRow) { //取得选定行信息 string nodeName = gridView1.GetRowCellValue(gridView1.FocusedRowHandle, "nodeName").ToString(); //string nodeName = gridView1.GetRowCellValue(gridView1.GetSelectedRows()[0], "nodeName").ToString(); string sql = "select nodeDetail from treelist where nodeName = '" + nodeName + "'"; SqlCommand comm = new SqlCommand(sql, conn); try { conn.Open(); MessageBox.Show(comm.ExecuteScalar().ToString(), "Detail"); } catch (Exception ex) { MessageBox.Show(ex.Message, "Error"); } finally { conn.Close(); } } } }
那么MouseDown方法与DoubleClick有什么区别呢?grid1_DoubleClick(object sender, EventArgs e)函数会捕获整个grid的双击事件而不仅仅是双击列表行事件,比如:你双击表头、列表展示数据的下方的空白部分都会引发grid1_DoubleClick(object sender, EventArgs e)函数,而ViewHtlb_MouseDown(object sender, MouseEventArgs e)函数此时不会被激活。
定位到某数据/记录??
this.gridView.MoveFirst(); this.gridView.MoveNext(); this.gridView.MoveLast();
禁止 各列头 移动\排序\改变列宽
gridView1.OptionsCustomization.AllowColumnMoving = false; gridView1.OptionsCustomization.AllowSort = false; gridView1.OptionsCustomization.AllowColumnResizing = false;
拖动滚动条时固定某一列
设置Columns,选择要固定的列,设置Fixed属性,
可以选择以下固定方式:
- a. 固定在左边、
- b. 固定在右边、
- c. 不固定。
呈现给用户自定义的菜单:
#region Grid events private void gridView_PopupMenuShowing(object sender, DevExpress.XtraGrid.Views.Grid.PopupMenuShowingEventArgs e) { if (e.MenuType == DevExpress.XtraGrid.Views.Grid.GridMenuType.Column) { DevExpress.XtraGrid.Menu.GridViewColumnMenu menu = e.Menu as DevExpress.XtraGrid.Menu.GridViewColumnMenu; menu.Items.Clear(); if (menu.Column != null) { menu.Items.Add(CreateCheckItem("取消固定", menu.Column, DevExpress.XtraGrid.Columns.FixedStyle.None, imageList2.Images[0])); menu.Items.Add(CreateCheckItem("固定到左边", menu.Column, DevExpress.XtraGrid.Columns.FixedStyle.Left, imageList2.Images[1])); menu.Items.Add(CreateCheckItem("固定到右边", menu.Column, DevExpress.XtraGrid.Columns.FixedStyle.Right, imageList2.Images[2])); } } } #endregion #region New column menu DXMenuCheckItem CreateCheckItem(string caption, GridColumn column, DevExpress.XtraGrid.Columns.FixedStyle style, Image image) { DXMenuCheckItem item = new DXMenuCheckItem(caption, column.Fixed == style, image, new EventHandler(OnFixedClick)); item.Tag = new MenuInfo(column, style); return item; } void OnFixedClick(object sender, EventArgs e) { DXMenuItem item = sender as DXMenuItem; MenuInfo info = item.Tag as MenuInfo; if (info == null) return; info.Column.Fixed = info.Style; } class MenuInfo { public MenuInfo(GridColumn column, DevExpress.XtraGrid.Columns.FixedStyle style) { this.Column = column; this.Style = style; } public DevExpress.XtraGrid.Columns.FixedStyle Style; public GridColumn Column; } #endregion
设置自动增加的行号
this.gridView1.IndicatorWidth = 30;//设置显示行号的列宽
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 > -1000 && e.RowHandle < 0){ e.Info.Appearance.BackColor = System.Drawing.Color.AntiqueWhite; e.Info.DisplayText = "G" + e.RowHandle.ToString(); } } }
在查询得到 0 条记录时, 显示自定义的字符提示
// 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); var tmpLeft = e.Bounds.Left + 5; var tmpTop = e.Bounds.Top + 5; var tmpWidth = e.Bounds.Width - 5; var tmpHeight = e.Bounds.Height - 5; Rectangle r = new Rectangle(tmpLeft, tmpTop, tmpWidth, tmpHeight); e.Graphics.DrawString(str, f, Brushes.Black, rect); } } // 方法二(此方法 适用于: GridView 没有设置数据源时) 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); var tmpLeft = e.Bounds.Left + 5; var tmpTop = e.Bounds.Top + 5; var tmpWidth = e.Bounds.Width - 5; var tmpHeight = e.Bounds.Height - 5; Rectangle r = new Rectangle(tmpLeft, tmpTop, tmpWidth, tmpHeight); e.Graphics.DrawString(str, f, Brushes.Black, r); } }
到此这篇关于.Net使用XtraGrid控件绑定数据的文章就介绍到这了。希望对大家的学习有所帮助,也希望大家多多支持阿兔在线工具。