作者：miedao1592_460 | 来源：互联网 | 2023-05-31 16:41
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
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();
}
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