DevExpress的常用方法

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

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。

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
        }

点击打开链接

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();
                }
            }

｝

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 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

30.合并单元格

  设置Gridview的AllowCellMerge属性为ture,然后设置要合并列的AllowCellMerge为True，这样某列相同行内容就会合并了

31.如果要改变单元格样式，如字体颜色，背景什么，像html页面样式。。。。

将ColumnEdit改成repositoryItemRichTextEdit然后ColumnEdit=>DocumentFormat改成html，这样单元格就可以显示跟html一样的样式，很方便

32.动态绑定列的下拉框值

     private DevExpress.XtraEditors.Repository.RepositoryItemImageComboBox repositoryItemImageComboBox_Test = new DevExpress.XtraEditors.Repository.RepositoryItemImageComboBox();

        private void gvList_CustomRowCellEdit(object sender, DevExpress.XtraGrid.Views.Grid.CustomRowCellEditEventArgs e)
        {
            string fieldName = e.Column.FieldName;
            DataRow selectRow = gvList.GetDataRow(e.RowHandle);
            if (fieldName == "test")
            {
                if (Convert.ToInt32(selectRow["aaa"]) == 0)
                {

         repositoryItemImageComboBox_Test.Items.AddRange(new DevExpress.XtraEditors.Controls.ImageComboBoxItem[] {
            new DevExpress.XtraEditors.Controls.ImageComboBoxItem("A", "A", -1),
            new DevExpress.XtraEditors.Controls.ImageComboBoxItem("B", "B", -1),
            new DevExpress.XtraEditors.Controls.ImageComboBoxItem("C", "C", -1),
                          new DevExpress.XtraEditors.Controls.ImageComboBoxItem("D", "D", -1)});
                    e.RepositoryItem = repositoryItemImageComboBox_Test;
                }
                else
                {

        repositoryItemImageComboBox_Test.Items.AddRange(new                   DevExpress.XtraEditors.Controls.ImageComboBoxItem[] {
            new DevExpress.XtraEditors.Controls.ImageComboBoxItem("A", "A", -1),
            new DevExpress.XtraEditors.Controls.ImageComboBoxItem("B", "B", -1),
            new DevExpress.XtraEditors.Controls.ImageComboBoxItem("C", "C", -1),
                    e.RepositoryItem = repositoryItemImageComboBox_Test;
                }
            }
        }