C# gridview 列頭畫表格
阿新 • • 發佈：2019-01-22
http://www.csframework.com/archive/2/arc-2-20110713-1691.htm
給DevExpress GridView的選擇列Header新增CheckBox實現對所有資料行的全選功能
看圖:
顯示選擇行的資料:
///
<summary>
/// C# GridView列頭新增CheckBox控制元件實現全選功能
///
</summary>
public class GridCheckMarksSelection
{
protected GridView _GridView;
protected ArrayList _Selection;
private
private RepositoryItemCheckEdit _CheckEdit;
public GridCheckMarksSelection()
{
_Selection = new ArrayList();
}
public GridCheckMarksSelection(GridView view)
: this()
{
this.View = view;
}
protected virtual void
{
if (view == null)
{
return;
}
_Selection.Clear();
this._GridView = view;
_CheckEdit = (RepositoryItemCheckEdit)view.GridControl.RepositoryItems.Add("CheckEdit");
//
_CheckEdit.EditValueChanged += Edit_EditValueChanged;
_CheckColumn = view.Columns.Add();
_CheckColumn.OptionsColumn.AllowSort = DevExpress.Utils.DefaultBoolean.False;
_CheckColumn.VisibleIndex = int
_CheckColumn.FieldName = "CheckMarkSelection";
_CheckColumn.Caption = "Mark";
_CheckColumn.OptionsColumn.ShowCaption = false;
_CheckColumn.UnboundType = DevExpress.Data.UnboundColumnType.Boolean;
_CheckColumn.ColumnEdit = _CheckEdit;
view.Click += View_Click;
view.CustomDrawColumnHeader += View_CustomDrawColumnHeader;
view.CustomDrawGroupRow += View_CustomDrawGroupRow;
view.CustomUnboundColumnData += view_CustomUnboundColumnData;
view.RowStyle += view_RowStyle;
}
protected virtual void Detach()
{
if (View == null)
{
return;
}
if ((_CheckColumn != null))
{
_CheckColumn.Dispose();
}
if ((_CheckEdit != null))
{
View.GridControl.RepositoryItems.Remove(_CheckEdit);
_CheckEdit.Dispose();
}
_GridView.Click -= View_Click;
_GridView.CustomDrawColumnHeader -= View_CustomDrawColumnHeader;
_GridView.CustomDrawGroupRow -= View_CustomDrawGroupRow;
_GridView.CustomUnboundColumnData -= (view_CustomUnboundColumnData);
_GridView.RowStyle -= view_RowStyle;
View = null;
}
protected void DrawCheckBox(Graphics g, Rectangle r, bool Checked, bool Grayed)
{
DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo info = default(DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo);
DevExpress.XtraEditors.Drawing.CheckEditPainter painter = default(DevExpress.XtraEditors.Drawing.CheckEditPainter);
DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs args = default(DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs);
info = (DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo)_CheckEdit.CreateViewInfo();
painter = (DevExpress.XtraEditors.Drawing.CheckEditPainter)_CheckEdit.CreatePainter();
if (Grayed)
{
info.EditValue = _CheckEdit.ValueGrayed;
}
else
{
info.EditValue = Checked;
}
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();
}
private void View_Click(object sender, EventArgs e)
{
GridHitInfo info = default(GridHitInfo);
Point pt = View.GridControl.PointToClient(Control.MousePosition);
info = View.CalcHitInfo(pt);
if (info.InColumn & object.ReferenceEquals(info.Column, _CheckColumn))
{
if (SelectedCount == View.DataRowCount)
{
ClearSelection();
}
else
{
SelectAll();
}
}
if (info.InRow & View.IsGroupRow(info.RowHandle) & info.HitTest != GridHitTest.RowGroupButton)
{
bool selected = IsGroupRowSelected(info.RowHandle);
SelectGroup(info.RowHandle, !selected);
}
}
private void View_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e)
{
if (object.ReferenceEquals(e.Column, _CheckColumn))
{
e.Info.InnerElements.Clear();
e.Painter.DrawObject(e.Info);
bool gray = SelectedCount > 0 & SelectedCount < View.DataRowCount;
DrawCheckBox(e.Graphics, e.Bounds, SelectedCount == View.DataRowCount, gray);
e.Handled = true;
}
}
private void View_CustomDrawGroupRow(object sender, RowObjectCustomDrawEventArgs e)
{
DevExpress.XtraGrid.Views.Grid.ViewInfo.GridGroupRowInfo info = default(DevExpress.XtraGrid.Views.Grid.ViewInfo.GridGroupRowInfo);
info = (DevExpress.XtraGrid.Views.Grid.ViewInfo.GridGroupRowInfo)e.Info;
info.GroupText = " " + info.GroupText.TrimStart();
e.Info.Paint.FillRectangle(e.Graphics, e.Appearance.GetBackBrush(e.Cache), e.Bounds);
e.Painter.DrawObject(e.Info);
Rectangle r = info.ButtonBounds;
r.Offset(r.Width * 2, 0);
int g = GroupRowSelectionStatus(e.RowHandle);
DrawCheckBox(e.Graphics, r, g > 0, g < 0);
e.Handled = true;
}
private void view_RowStyle(object sender, RowStyleEventArgs e)
{
if (IsRowSelected(e.RowHandle))
{
e.Appearance.BackColor = SystemColors.Highlight;
e.Appearance.ForeColor = SystemColors.HighlightText;
}
}
public GridView View
{
get { return _GridView; }
set
{
if ((!object.ReferenceEquals(_GridView, value)))
{
Detach();
Attach(value);
}
}
}
public GridColumn CheckMarkColumn
{
get { return _CheckColumn; }
}
public int SelectedCount
{
get { return _Selection.Count; }
}
public object GetSelectedRow(int index)
{
return this._Selection[index];
}
public int GetSelectedIndex(object row)
{
return _Selection.IndexOf(row);
}
public void ClearSelection()
{
_Selection.Clear();
Invalidate();
}
private void Invalidate()
{
View.BeginUpdate();
View.EndUpdate();
}
public void SelectAll()
{
_Selection.Clear();
if (View.DataSource is ICollection)
{
// fast
_Selection.AddRange((ICollection)View.DataSource);
}
else
{
int i = 0;
for (i = 0; i <= View.DataRowCount - 1; i++)
{
// slow
_Selection.Add(View.GetRow(i));
}
}
Invalidate();
}
public void SelectGroup(int rowHandle, bool @select)
{
if (IsGroupRowSelected(rowHandle) & @select)
{
return;
}
int i = 0;
for (i = 0; i <= (View.GetChildRowCount(rowHandle)) - 1; i++)
{
int childRowHandle = View.GetChildRowHandle(rowHandle, i);
if (View.IsGroupRow(childRowHandle))
{
SelectGroup(childRowHandle, @select);
}
else
{
SelectRow(childRowHandle, @select, false);
}
}
Invalidate();
}
public void SelectRow(int rowHandle, bool @select)
{
SelectRow(rowHandle, @select, true);
}
private void SelectRow(int rowHandle, bool @select, bool invalidate)
{
if (IsRowSelected(rowHandle) == @select)
{
return;
}
object row = View.GetRow(rowHandle);
if (@select)
{
_Selection.Add(row);
}
else
{
_Selection.Remove(row);
}
if (invalidate)
{
this.Invalidate();
}
}
public int GroupRowSelectionStatus(int rowHandle)
{
int count = 0;
int i = 0;
for (i = 0; i <= (View.GetChildRowCount(rowHandle)) - 1; i++)
{
int row = View.GetChildRowHandle(rowHandle, i);
if (View.IsGroupRow(row))
{
int g = GroupRowSelectionStatus(row);
if (g < 0)
{
return g;
}
if (g > 0)
{
count += 1;
}
}
else
{
if (IsRowSelected(row))
{
count += 1;
}
}
}
if (count == 0)
{
return 0;
}
if (count == View.GetChildRowCount(rowHandle))
{
return 1;
}
return -1;
}
public bool IsGroupRowSelected(int rowHandle)
{
int i = 0;
for (i = 0; i <= (View.GetChildRowCount(rowHandle)) - 1; i++)
{
int row = View.GetChildRowHandle(rowHandle, i);
if (View.IsGroupRow(row))
{
if (!IsGroupRowSelected(row))
{
return false;
}
}
else
{
if (!IsRowSelected(row))
{
return false;
}
}
}
return true;
}
public bool IsRowSelected(int rowHandle)
{
if (View.IsGroupRow(rowHandle))
{
return IsGroupRowSelected(rowHandle);
}
object row = View.GetRow(rowHandle);
return GetSelectedIndex(row) != -1;
}
private void view_CustomUnboundColumnData(object sender, CustomColumnDataEventArgs e)
{
if (object.ReferenceEquals(e.Column, CheckMarkColumn))
{
if (e.IsGetData)
{
e.Value = IsRowSelected(e.RowHandle);
}
else
{
SelectRow(e.RowHandle, (bool)e.Value);
}
}
}
private void Edit_EditValueChanged(object sender, EventArgs e)
{
View.PostEditor();
}
}