• XtraGrid的CustomUnboundColumnData事件的触发条件


    https://www.cnblogs.com/zhao123/p/3913772.html

    https://www.cnblogs.com/netsong/p/8028851.html

    ---------------------------------------------------------------------

    复制代码
    1.隐藏最上面的GroupPanel 
      gridView1.OptionsView.ShowGroupPanel=false; 
      
    2.得到当前选定记录某字段的值 
      sValue=Table.Rows[gridView1.FocusedRowHandle][FieldName].ToString(); 
      
    3.数据只读 
      gridView1.OptionsBehavior.Editable=false; 
      
    4.不显示MasterDetailView 
      gridView1.OptionsDetail.EnableMasterViewMode=false; 
      
    5.修改最上面的GroupPanel内容 
       gridView1.GroupPanelText="柳生飘絮"; 
      
    6.设置数据源: 
       gridControl1.DataSource = dt; 
       绑定每一列的FiledName--属性 
       对于Oracle数据库,所有的在设计器里写的程序中的字段名必须大写,否则可能绑定不上字段,sqlserver没有这个限制. 
      
    7.读写拷贝权限设置 
      只读不可拷贝: 
        ColumnViewOptionsBehavior.Editable = False 
      
      只读可拷贝: 
        ColumnViewOptionsBehavior.Editable = True 
        OptionsColumn.AllowEdit = True 
        OptionsColumn.ReadOnly = True 
      
      可编辑: 
        ColumnViewOptionsBehavior.Editable = True 
        OptionsColumn.AllowEdit = True 
        OptionsColumn.ReadOnly = False 
      
    8.模板列的设置: 
      到Columns中,在他的属性中找到ColumnEdit. 
      以LookUpEdit为例: 
      首先从Designer左边菜单In-Place Editor Repository中添加LookUpEdit.取名为Re1.然后.在他的Columns属性中添加3列.Caption依次为:编号,姓名,性别.FieldName依次为:FID,FNAME,FSEX.然后将Re1的NullText设置成空. 
      AutoSearchColumnIndex属性设置为2.ImmediatePopup属性设置为True. 
      SearchMode设置为OnlyInPopup. 
      然后将这个模板列附加到我们上面提到的列1(也就是将列1的ColumnEdit属性设成Re1) 
      最后我们还要在代码里面给Re1绑定数据源和显示项. 
             Re1.DataSource = DALUse.Query("select fid,fname,fsex from dual").Tables[0]; 
             Re1.DisplayMember = "FSEX"; 
             Re1.ValueMember = "FNAME"; 
      
       
      
    9.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; 
      
      
    10.去掉某一列上面的自动筛选功能(Filter)                   
       gridView1.Columns[0].OptionsFilter.AllowAutoFilter = false; 
       gridView1.Columns[0].OptionsFilter.AllowFilter = false;                 
       gridView1.Columns[0].OptionsFilter.ImmediateUpdateAutoFilter = false; 
      
      
    11.设置冻结列(左冻结) 
      gridView1.Columns[0].Fixed= DevExpress.XtraGrid.Columns.FixedStyle.Left; 
      
      
    12.得到单元格数据(0行0列) 
       string ss=gridView1.GetRowCellDisplayText(0, gridView1.Columns[0]); 
       string ss = gridView1.GetRowCellValue(0, gridView1.Columns[0]); 
      
      
    13.设置单元格数据(将0行0列的单元格赋值123) 
       gridView1.SetRowCellValue(0, gridView1.Columns[0], "123"); 
      
      
    13.手动添加dev的列 
      DevExpress.XtraGrid.Columns.GridColumn Col1=new DevExpress.XtraGrid.Columns.GridColumn (); 
      Col1.FieldName="FID"; 
      Col1.Visible=true; 
      Col1.VisibleIndex=gridView1.Columns.Count; 
      gridView1.Columns.Add(Col1); 
      
      
    14.设置自动增加的行号,需要先添加给gridview添加事件CustomDrawRowIndicator 
      
        private void gridview_CustomDrawRowIndicator(object sender,                            DevExpress.XtraGrid.Views.Grid.RowIndicatorCustomDrawEventArgs e) 
        { 
            if (e.Info.IsRowIndicator && e.RowHandle >= 0) 
                    e.Info.DisplayText = (e.RowHandle + 1).ToString(); 
        } 
      
    15.删除: (修改了dgvdel里的datagridviewdel方法) 
        public static void datagridviewdel_Dev(DevExpress.XtraGrid.Views.Grid.GridView Mydgv) 
        { 
           if (MessageBox.Show("你确定要删除选中的记录吗?", "删除提示", MessageBoxButtons.YesNo,               MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2, 0, false) == DialogResult.Yes) 
           { 
               int iSelectRowCount = Mydgv.SelectedRowsCount; 
               if (iSelectRowCount > 0) 
               { 
                 Mydgv.DeleteSelectedRows(); 
               } 
           } 
        } 
       
    16. 新增: (对于新增,其本身的AddNewRow方法就可以做到) 
        private void btn_add_Click(object sender, EventArgs e) 
        {   
           gridView1.AddNewRow();    
         } 
        具体如果对于新加行还有什么特别的设置,可以在它gridView1_InitNewRow事件中填写: 
        private void gridView1_InitNewRow(object sender, DevExpress.XtraGrid.Views.Grid.InitNewRowEventArgs e) 
        { 
           ColumnView View = sender as ColumnView; 
           View.SetRowCellValue(e.RowHandle, View.Columns[0], gridView1.GetRowCellValue(gridView1.GetRowHandle(gridView1.RowCount - 2), gridView1.Columns[0])); //复制最后一行的数据到新行 
      
                View.SetRowCellValue(e.RowHandle, View.Columns[1], gridView1.GetRowCellValue(gridView1.GetRowHandle(gridView1.RowCount - 2), gridView1.Columns[1])); //复制最后一行的数据到新行 
      
        } 
      
      
    17. 保存 (第三方控件提供的RefreshData和RefreshDataSource方法对于保存数据都不好使,最后还是使用了Dgvsave的datagridviewsave方法,用这个方法就可以) 
      
      
    18.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; 
            } 
      
    19.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"); 
      } 
      
      } 
      #endregion 
      调用gridview.UpdateCurrentRow()方法执行检查 
      
      
    最常用的DevExpress Winform 4个代码片段: 
      
    一 、GridControl的删除操作 
      
    private void rILinkEditInfoDel_Click(object sender, EventArgs e) 
    { 
         if (XtraMessageBox.Show("请确定是否删除当前记录?", "警告", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes) 
         { 
             DataRow row = gvInfos.GetDataRow(gvInfos.FocusedRowHandle); 
              delByCode(row["Code"].ToString()); 
             XtraMessageBox.Show("操作成功!"); 
         } 
    } 
      
    二、绑定非数据表中列 
      
    Hashtable ht = new Hashtable(); 
      
    private void gridView6_CustomUnboundColumnData(object sender, DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgs e) 
    { 
         GridView View = sender as GridView; 
         if (e.RowHandle >= 0) 
         { 
             object needAlert = View.GetRowCellValue(e.RowHandle, View.Columns["needAlert"]); 
             if (needAlert != null & needAlert != DBNull.Value && needAlert.ToString().Trim() != "0" & View.GetRowCellValue(e.RowHandle, View.Columns["Value"]) != DBNull.Value) 
             { 
                 decimal AverValue = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle, View.Columns["Value"])); 
                 object MinValue = View.GetRowCellValue(e.RowHandle, View.Columns["MinValue"]); 
                 object MaxVlaue = View.GetRowCellValue(e.RowHandle, View.Columns["MaxValue"]); 
                 if (MinValue != DBNull.Value & MinValue != null & MaxVlaue.ToString() != "" & MaxVlaue != DBNull.Value && MaxVlaue != null & MaxVlaue.ToString() != "") 
                 { 
                     decimal gridColumn2 = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle, View.Columns["MinValue"])); 
                     decimal gridColumn1 = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle, View.Columns["MaxValue"])); 
                     if (gridColumn2 > AverValue || AverValue > gridColumn1) 
                     { 
                         if (!ht.ContainsKey("pic")) 
                             ht.Add("pic", GetImage(1)); 
                         e.Value = ht["pic"]; 
                     } 
                 } 
             } 
         } 
    } 
      
    /// <summary> 
    /// 由资源文件获取图片 
    /// </summary> 
    /// <param name="key"></param> 
    /// <returns></returns> 
    byte[] GetImage(int key) 
    { 
         Image img = DevExpress.Utils.Controls.ImageHelper.CreateImageFromResources(string.Format("RiverSys.Resources.{0}.gif", key.ToString()), typeof(RiverInfos).Assembly); 
         return DevExpress.XtraEditors.Controls.ByteImageConverter.ToByteArray(img, ImageFormat.Gif); 
    } 
      
    /// <summary> 
    /// 动态根据条件设置行样式 
    /// </summary> 
    /// <param name="sender"></param> 
    /// <param name="e"></param> 
    private void gridView6_RowStyle(object sender, DevExpress.XtraGrid.Views.Grid.RowStyleEventArgs e) 
    { 
         GridView View = sender as GridView; 
         if (e.RowHandle >= 0) 
         { 
             object needAlert = View.GetRowCellValue(e.RowHandle, View.Columns["needAlert"]); 
             if (needAlert != null & needAlert != DBNull.Value && needAlert.ToString().Trim() != "0" & View.GetRowCellValue(e.RowHandle, View.Columns["Value"]) != DBNull.Value) 
             { 
                 decimal AverValue = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle, View.Columns["Value"])); 
                 object MinValue = View.GetRowCellValue(e.RowHandle, View.Columns["MinValue"]); 
                 object MaxVlaue = View.GetRowCellValue(e.RowHandle, View.Columns["MaxValue"]); 
                 if (MinValue != DBNull.Value & MinValue != null & MaxVlaue.ToString() != "" & MaxVlaue != DBNull.Value && MaxVlaue != null & MaxVlaue.ToString() != "") 
                 { 
                     decimal gridColumn2 = Convert.ToDecimal(MinValue); 
                     decimal gridColumn1 = Convert.ToDecimal(MaxVlaue); 
                     if (gridColumn2 > AverValue || AverValue > gridColumn1) 
                     { 
                         e.Appearance.ForeColor = Color.Red; 
                         e.Appearance.BackColor = Color.LightGray; 
                     } 
                 } 
             } 
         } 
    } 
      
    三、GridControl 中颜色选择控件 
      
    private void gvMapColor_CustomUnboundColumnData(object sender, DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgs e) 
    { 
         GridView view = sender as GridView; 
         DataView dv = view.DataSource as DataView; 
         if (e.IsGetData) 
         { 
             string strVal = dv[e.ListSourceRowIndex]["Color"].ToString(); 
             if (strVal != "") 
             { 
                 //e.Value = DevExpress.Utils.StyleLayout.ColorFromString(strVal); 
                 e.Value = Common.HexToColor(strVal); 
             } 
         } 
         else
         { 
             //Color colorVal = DevExpress.Utils.StyleLayout.ColorFromString(e.Value.ToString()); 
             Color colorVal = (Color)e.Value; 
             dv[e.ListSourceRowIndex]["Color"] = Common.RGB_HEX(colorVal.ToArgb()); 
         } 
    } 
      
    四、关于 GridControl 验证示例 
      
    /// <summary> 
    /// 初始化GridView,绑定数据 
    /// </summary> 
    /// <param name="parentId"></param> 
    private void GridViewBindData(string parentId) 
    { 
    this.gridView1.Columns.Clear(); 
    this.FDs= areaSetupActionHelper.getDsRegionByParentId(parentId); 
    this.gridCArea.DataSource =this.FDs.Tables[0].DefaultView; 
      
        this.gridView1.Columns["id"].VisibleIndex = -1; 
        this.gridView1.Columns["childCounts"].VisibleIndex = -1; 
      
        this.gridView1.Columns["reg_id"].Caption = "区划编号"; 
        this.gridView1.Columns["reg_name"].Caption = "区划名称"; 
        this.gridView1.Columns["parent_id"].Caption = "父区划编号"; 
        this.gridView1.Columns["reg_desc"].Caption = "区划描述"; 
        this.gridView1.Columns["parent_id"].ImageIndex =1; 
        this.gridView1.Columns["reg_desc"].ImageIndex = 0; 
      
        RepositoryItemTextEdit textEditReg_Id = new RepositoryItemTextEdit(); 
        textEditReg_Id.Mask.EditMask =parentId+"file://d{2,3/}"; 
        textEditReg_Id.Mask.MaskType = DevExpress.XtraEditors.Mask.MaskType.Regular; 
      
        this.gridView1.Columns["reg_id"].ColumnEdit = textEditReg_Id; 
      
        this.gridView1.Columns["reg_desc"].ColumnEdit = new RepositoryItemMemoExEdit(); 
      
        TreeListNode node = this.treelArea.FocusedNode.ParentNode; 
        string fid = node==null?"0":node.GetValue("RegID").ToString().Trim(); 
        DataSet ds = areaSetupActionHelper.getDsRegionByParentId(fid); 
        RepositoryItemLookUpEdit lookUEParent_Id = new RepositoryItemLookUpEdit(); 
        lookUEParent_Id.Columns.Add(new LookUpColumnInfo("reg_id", 40, "区划编号")); 
        lookUEParent_Id.Columns.Add(new LookUpColumnInfo("reg_name", 40, "区划名称")); 
        lookUEParent_Id.DataSource = ds.Tables[0].DefaultView; 
        lookUEParent_Id.ValueMember = "reg_id"; 
        lookUEParent_Id.DisplayMember = "reg_id"; 
        this.gridView1.Columns["parent_id"].ColumnEdit = lookUEParent_Id; 
    } 
    /// <summary> 
    /// gridView单元格验证的相关处理程序 
    /// </summary> 
    /// <param name="sender"></param> 
    /// <param name="e"></param> 
    private void gridView1_ValidatingEditor(object sender, DevExpress.XtraEditors.Controls.BaseContainerValidateEditorEventArgs e) 
    { 
    if (e.Valid == false&this.gridView1.FocusedColumn.FieldName == "reg_id") 
    { 
          e.ErrorText = "区划编号不合法!
    应为父区划编号加2~3位数据组成!";    
        } 
        if (this.gridView1.FocusedColumn.FieldName == "reg_name") 
        {      
         Regex reg=new Regex(@"[u4e00-u9fa5]{1,20}"); 
         Match m=reg.Match(e.Value.ToString().Trim()); 
         if (m.Length != e.Value.ToString().Trim().Length) 
         { 
          e.Valid = false; 
          e.ErrorText = "区划名称应为汉字
    长度为1至20"; 
         } 
        } 
    } 
      
    private void gridView1_InvalidValueException(object sender, InvalidValueExceptionEventArgs e) 
    { 
        if (MyDialog.Alert(" 您所填写的内容不符合规则
     要放弃您刚才对此项所做的更改吗?", "您所编辑的内容不符合规则", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes) 
        { 
         e.ExceptionMode = ExceptionMode.Ignore; 
        } 
    } 
      
    /// <summary> 
    /// gridView行验证的相关处理程序 
    /// </summary> 
    private void gridView1_ValidateRow(object sender, DevExpress.XtraGrid.Views.Base.ValidateRowEventArgs e) 
    { 
    string regid = this.gridView1.GetRowCellValue(e.RowHandle, "reg_id").ToString().Trim(); 
    string regName = this.gridView1.GetRowCellValue(e.RowHandle, "reg_name").ToString().Trim(); 
    if ( regid.Length < 1) 
    { 
         e.Valid = false; 
         this.gridView1.SetColumnError(this.gridView1.Columns["reg_id"], "请填写区划编号!", DevExpress.XtraEditors.DXErrorProvider.ErrorType.Default); 
          // e.ErrorText = "区划名称不能为空!"; 
        } 
        if (regName.Length < 1) 
        { 
         e.Valid = false; 
         this.gridView1.SetColumnError(this.gridView1.Columns["reg_name"], "区划名称不能为空!", DevExpress.XtraEditors.DXErrorProvider.ErrorType.Default); 
        } 
    } 
      
    private void gridView1_InvalidRowException(object sender, DevExpress.XtraGrid.Views.Base.InvalidRowExceptionEventArgs e) 
    { 
      
        if (e.RowHandle >= 0) 
        { 
         if (this.gridView1.GetRowCellValue(e.RowHandle, this.gridView1.Columns["reg_id"]).ToString().Trim() == "" || this.gridView1.GetRowCellValue(e.RowHandle, this.gridView1.Columns["reg_name"]).ToString().Trim() == "") 
         { 
          if (MyDialog.Alert("  您所填写的内容不符合规则
     要放弃您刚才对此项所做的更改吗?", "您所编辑的内容不符合规则", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes) 
          { 
           e.ExceptionMode = ExceptionMode.Ignore; 
          } 
          else
          { 
           e.ExceptionMode = ExceptionMode.NoAction; 
          } 
         } 
        } 
        else
        { 
         e.ExceptionMode = ExceptionMode.Ignore; 
        } 
    } 
      
       
      
    关于XtraGrid的使用(GridControl小结)来源:51编程网发布时间:2010-04-19Hits:146 
    DevExpress XtraGrid的使用(AspxGridControl小结)收藏 
      
    自定义焦点行的方法: gridView_bcode.FocusedRowHandle = focuseRowInt; //通过设置GridView 的FocusedRowHandle属性 
       
    view plaincopy to clipboardprint? 
    //获取焦点行任意单元格的数据     
    ColumnView cv = (ColumnView)gridControl_Gongzi.FocusedView;//重新获取此ID 否则无法从表头连删获取不到id    
                            int focusedhandle = cv.FocusedRowHandle;    
                            object rowIdObj = gridView1.GetRowCellValue(focusedhandle, "id");    
                            if (DBNull.Value != rowIdObj)    
                            {    
                                FocusedRow_id = Convert.ToInt32(rowIdObj);    
                            }   
    //获取焦点行任意单元格的数据  
    ColumnView cv = (ColumnView)gridControl_Gongzi.FocusedView;//重新获取此ID 否则无法从表头连删获取不到id 
                            int focusedhandle = cv.FocusedRowHandle; 
                            object rowIdObj = gridView1.GetRowCellValue(focusedhandle, "id"); 
                            if (DBNull.Value != rowIdObj) 
                            { 
                                FocusedRow_id = Convert.ToInt32(rowIdObj); 
                            } 
     view plaincopy to clipboardprint? 
    //当数据发生变化时执行     
         private void gridView1_CellValueChanged(object sender, CellValueChangedEventArgs e)    
         {    
             int intRowHandle = e.RowHandle;    
             FocusedRow_bumen = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "bumen"));    
             FocusedRow_xingming = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "xingming"));    
             //FocusedRow_jibengongzi = Convert.ToDecimal(gridView1.GetRowCellValue(intRowHandle, "jibengongzi"));    
             object rowJibengongziObj = gridView1.GetRowCellValue(intRowHandle, "jibengongzi");    
             if (DBNull.Value != rowJibengongziObj)    
             {    
                 FocusedRow_jibengongzi = Convert.ToDecimal(rowJibengongziObj);    
             }    
          }   
       //当数据发生变化时执行  
            private void gridView1_CellValueChanged(object sender, CellValueChangedEventArgs e) 
            { 
                int intRowHandle = e.RowHandle; 
                FocusedRow_bumen = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "bumen")); 
                FocusedRow_xingming = Convert.ToString(gridView1.GetRowCellValue(intRowHandle, "xingming")); 
                //FocusedRow_jibengongzi = Convert.ToDecimal(gridView1.GetRowCellValue(intRowHandle, "jibengongzi")); 
                object rowJibengongziObj = gridView1.GetRowCellValue(intRowHandle, "jibengongzi"); 
                if (DBNull.Value != rowJibengongziObj) 
                { 
                    FocusedRow_jibengongzi = Convert.ToDecimal(rowJibengongziObj); 
                } 
             } view plaincopy to clipboardprint? 
    //设置焦点行的焦点单元格的位置    
    ColumnView view = (ColumnView)gridControl_Gongzi.FocusedView;    
    view.FocusedColumn = view.Columns["bumen"];   
    //设置焦点行的焦点单元格的位置 
    ColumnView view = (ColumnView)gridControl_Gongzi.FocusedView; 
    view.FocusedColumn = view.Columns["bumen"]; view plaincopy to clipboardprint? 
    //当焦点行发生改变时执行获取选中焦点行id    
           private void gridView1_FocusedRowChanged(object sender, DevExpress.XtraGrid.Views.Base.FocusedRowChangedEventArgs e)    
           {    
               int intRowHandle = e.FocusedRowHandle;    
        
               object rowIdObj = gridView1.GetRowCellValue(intRowHandle, "id");    
        
               if (DBNull.Value != rowIdObj)//做个判断否则获取不到id后报错    
               {    
                   FocusedRow_id = Convert.ToInt32(rowIdObj);    
               }    
           }   
     //当焦点行发生改变时执行 获取选中焦点行id 
            private void gridView1_FocusedRowChanged(object sender, DevExpress.XtraGrid.Views.Base.FocusedRowChangedEventArgs e) 
            { 
                int intRowHandle = e.FocusedRowHandle; 
       
                object rowIdObj = gridView1.GetRowCellValue(intRowHandle, "id"); 
       
                if (DBNull.Value != rowIdObj)//做个判断否则获取不到id后报错 
                { 
                    FocusedRow_id = Convert.ToInt32(rowIdObj); 
                } 
            }    
       
     view plaincopy to clipboardprint? 
    //焦点行的FocusedHandle为:    
     FocuseRow_Handle = -999998;    
    //获取焦点行的handle    
    ColumnView newview = (ColumnView)gridControl_Gongzi.FocusedView;    
        
                            FocuseRow_Handle = newview.FocusedRowHandle;    
    //回车添加新行    
      private void gridView1_KeyPress(object sender, KeyPressEventArgs e)    
                 
            {    
                if (e.KeyChar == 13)    
                {    
                    ColumnView view = (ColumnView)gridControl_Gongzi.FocusedView;    
                    if(view.IsLastRow)    
                    {    
                        if (FocuseRow_Handle == 0)    
                        {    
                            gridView1.AddNewRow();    
                                 
                            ColumnView newview = (ColumnView)gridControl_Gongzi.FocusedView;    
                                 
                            newview.FocusedColumn = newview.Columns["bumen"];//定位焦点网格的位置    
                                 
                            FocuseRow_Handle = newview.FocusedRowHandle;//获取新焦点行的FocuseRowHandle 并初始化全局变量FocuseRow_Handle供保存操作时判断是update还是insert
    复制代码

     C#中GridView格式化字符串,其实就是使用DataFromatString的方法,那么现在就向你介绍具体的内容和实现的实例应用,希望对你有所帮助。

        在我们从业务逻辑层获得数据实体时候,接下来的事情就是要绑定到控件中。数据实体中的一些字段可以直接绑定到界面中,但是有一些字段需要重新格式化格式。比如货币单位字段,需要显示货币符号和每隔三位显示分隔符;再比如日期字段,数据库中存放的是日期和时间,但是在界面上需要按照XXXX年XX月XX日的格式显示。这时候我们就用到了DataFormatString属性。

    复制代码
    ﹤asp:GridView ID="grvResult" runat="server"   
    AutoGenerateColumns="False" Width="100%"﹥   
    ﹤Columns﹥   
    ﹤asp:BoundField HeaderText="预定日期"   
    DataField="OperationDate" DataFormatString="{  
    0:yyyy-MM-dd}" HtmlEncode="False"﹥   
    ﹤/asp:BoundField﹥     
    ﹤asp:BoundField HeaderText="订单总计"   
    DataField="TotalRate" DataFormatString="{  
    0:C}" HtmlEncode="False"﹥   
    ﹤/asp:BoundField﹥   
    ﹤/Columns﹥   
    ﹤/asp:GridView﹥ 
    复制代码

    例如上面的代码展示了日期和货币两种绑定方式。DataFormatString中的{0}是固定的格式,这和String.Fromat(“{0}”, someString)中的{0}是一个用法,表示绑定上下文的参数索引编号。然后,在后面加入C#格式化字符串,具体的使用方法可以参考MSDN。

        C#中GridView格式化字符串注意以下几点

        1. 在GridView中的asp:BoundField使用DataFormatString必须设置属性HtmlEncode="False",否则不起作用。

        2. 如果需要使用日期类型的格式化字符串,必须数据实体中对应的字段也应该日起类型的。

        3. 格式化字符串C代表货币单位,需要绑定的数据类型应该是数字类型的。如果是字符串类型的不起作用,需要手动添加格式化字符串为DataFormatString="¥{0:C}"。

        C#中GridView格式化字符串的基本情况就向你介绍到这里,希望对你学习和理解C#中GridView格式化字符串有所帮助。

    复制代码
       1、在gridview中一直对“删除”不是很理解,在ASP的模式下面,这个删除链接应该有一个行ID标识,以便程序知道删除那一行,或针对这行做一些处理,然而在ASP.net里面也可以用,但是不是最好的。
        2、应该用LinkButton的各种属性,这时候非常方面,而且便于理解。这样不用选中一行(gridview.selectedRow 提供定位信息),然后再点击某种操作了。
        请注意 CommandName, CommandArgument 和 LinkButton的名字 CommandArgument 的对应关系。
        有了 CommandName 就知道是那个LinkButton控件。
        有了 CommandArgument(和行的ID绑定),就知道要处理那一行。
        swicth(CommandName)
        case "sort":{}
        case “delete”:{}
    复制代码

    XtraGrid的CustomUnboundColumnData是让非数据绑定的列触发事件。 以便于自行处理该列的显示数据与数据源。

    一、CustomUnboundColumnData事件的触发条件,否则不触发。

    1.将该列的UnboundType属性设置为bound(默认值)以外的数据类型

    2.为该列设置一个窗体内全局唯一的FieldName,注意这个FieldName甚至不能出现在窗体上其它XtraGrid中。

    说明:如果表格中部分Unbound列指定的FieldName不唯一,那么如果还有部分Unbound列符合上述条件,那么该部分列的CustomUnboundColumnData事件会正常触发。

    二、CustomUnboundColumnData使用说明。

    /// <summary>
    /// 非数据绑定事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>

    private void _gridView_CustomUnboundColumnData(object sender, DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgs e)
    {
       var data = e.Row as DataInfoShow; //行数据源
       if (data == null)
           return;
       if (e.Column == _colModelDataType) //指定列
       {
            if (e.IsGetData) //绑定行指定列数据时显示文本处理
            {
               e.Value = modelMap.ModelDataTypeName;
            }
           else //指定列值改变后,同步行数据源值
           {
                var value = e.Value as ModelDataType;
                data.ModelDataType = value.ID;
                data.ModelDataTypeName = value.Name;
           }
       }
    }

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  • 原文地址:https://www.cnblogs.com/zhoading/p/12311386.html
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