实现DataGridView和DevExpress.GridControl表头全选功能

2023-12-28 22:19:40

　1）DevExpress控件的GridView的实现多选操作

　　先讲DevExpress控件的GridView的实现，要实现的功能基本上是处理单击全选操作、重新绘制表头等操作，首先在加载第一步实现相关的事件和操作，如下所示。

this.gridView1.Click += new System.EventHandler(this.gridView1_Click);
this.gridView1.CustomDrawColumnHeader +=
new DevExpress.XtraGrid.Views.Grid.ColumnHeaderCustomDrawEventHandler
(this.gridView1_CustomDrawColumnHeader);
this.gridView1.DataSourceChanged +=
new EventHandler(gridView1_DataSourceChanged);

　　然后就是实现里面的事件操作了，对应的代码如下所示。

  private void gridView1_Click(object sender, EventArgs e)
         {
if (DevControlHelper.ClickGridCheckBox(this.gridView1, "Check", m_checkStatus))
             {
                 m_checkStatus = !m_checkStatus;
             }
         }

         private void gridView1_CustomDrawColumnHeader
(object sender, DevExpress.XtraGrid.Views.Grid.ColumnHeaderCustomDrawEventArgs e)
         {
             if (e.Column != null && e.Column.FieldName == "Check")
             {
                 e.Info.InnerElements.Clear();
                 e.Painter.DrawObject(e.Info);
                 DevControlHelper.DrawCheckBox(e, m_checkStatus);
                 e.Handled = true;
             }
         }
         void gridView1_DataSourceChanged(object sender, EventArgs e)
         {
             GridColumn column =
this.gridView1.Columns.ColumnByFieldName( "Check");
             if (column != null)
             {
                 column.Width = 80;
                 column.OptionsColumn.ShowCaption = false;
                 column.ColumnEdit = new RepositoryItemCheckEdit();
             }
}

　　其中单击和绘制表头的操作，交给另外一个类DevControlHelper来独立进行处理，数据源变化gridView1_DataSourceChanged实现的操作是寻找对应的全选列，并设置列宽、隐藏表头标题，并设置为复选框样式。

　　DevControlHelper 类的实现代码如下所示：

  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();
             }
         }

         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;
}

　　2）传统DataGridView实现全选操作

　　首先在第一列增加一个CheckBox控件，然后通过相关的事件，调整其位置，并相应对应的单击全选操作，初始化代码如下所示。

CheckBox HeaderCheckBox = null;
         public FrmNormalGridViewSelect()
         {
             InitializeComponent();

             if (!this.DesignMode)
             {
                 HeaderCheckBox = new CheckBox();
                 HeaderCheckBox.Size = new Size(15, 15);
                 this.dgvSelectAll.Controls.Add(HeaderCheckBox);

                 HeaderCheckBox.KeyUp += new KeyEventHandler(HeaderCheckBox_KeyUp);
                 HeaderCheckBox.MouseClick +=
new MouseEventHandler(HeaderCheckBox_MouseClick);
                 dgvSelectAll.CurrentCellDirtyStateChanged +=

new EventHandler(dgvSelectAll_CurrentCellDirtyStateChanged);
dgvSelectAll.CellPainting +=
new DataGridViewCellPaintingEventHandler(dgvSelectAll_CellPainting);
}
}

　　事件实现了CheckBox重绘调整，并处理单击事件，如下所示。

  private void HeaderCheckBox_MouseClick(object sender, MouseEventArgs e)
         {
             HeaderCheckBoxClick((CheckBox)sender);
         }

         private void dgvSelectAll_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
         {
             if (e.RowIndex == -1 && e.ColumnIndex == 0)
                     ResetHeaderCheckBoxLocation(e.ColumnIndex, e.RowIndex);
         }

         private void ResetHeaderCheckBoxLocation(int ColumnIndex, int RowIndex)
         {
             Rectangle oRectangle =
this.dgvSelectAll.GetCellDisplayRectangle(ColumnIndex, RowIndex, true);
             Point oPoint = new Point();
             oPoint.X =
oRectangle.Location.X + (oRectangle.Width - HeaderCheckBox.Width) / 2 + 1;
             oPoint.Y =
oRectangle.Location.Y + (oRectangle.Height - HeaderCheckBox.Height) / 2 + 1;
             HeaderCheckBox.Location = oPoint;
         }

         private void HeaderCheckBoxClick(CheckBox HCheckBox)
         {
             foreach (DataGridViewRow Row in dgvSelectAll.Rows)
             {
                 ((DataGridViewCheckBoxCell)Row.Cells[ "chkBxSelect"]).Value = HCheckBox.Checked;
             }
             dgvSelectAll.RefreshEdit();
}

实现DataGridView和DevExpress.GridControl表头全选功能

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