彩票走势图

看到网上有人说WinForm默认GridView多选操作不是很方便，想在列表的左边增加一列可以勾选，并且最好支持列表头部全选的操作，否则数据多的时候一个个勾选太费事。

基于以上需求，经过一番筛选，我最终选择了DevExpress GridControl来代替传统DataGridView实现以上需求。实现过程中，除了基于传统的DataGridView全选操作不能少，基于DevExpress控件的GridView全选操作也应该支持。

下面先上图介绍两种不同的效果，然后在详细介绍代码的实现。

 

 

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();
    }

转载自//www.cnblogs.com/wuhuacong/archive/2011/12/30/2307600.html

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