• DevExpress Grid使用checkBox选中的方法

    到官网得到消息自13.2版本后的Dev Grid中均内置了CheckBox列多选功能。在寻找答案的过程的成果进行记录。

    一、13.2版本以后用法

    1. 启用多选列
      对Gird中的View进行以下属性设置：
       gridView1.OptionsSelection.MultiSelect = true;
 gridView1.OptionsSelection.MultiSelectMode = GridMultiSelectMode.CheckBoxRowSelect;
    2. 清除当前选择
      在选中列时后，可配置在选中列以外的地方点击时候会清除当前的选择。14以后才有此功能
      gridView1.OptionsSelection.ResetSelectionClickOutsideCheckboxSelector = true;
    3. 获取选中的行

    二、早起版本实现

         相关链接：http://www.devexpress.com/Support/Center/Example/Details/E1271

    1. GridCheckMarksSelection类
        1 public class GridCheckMarksSelection {
  2         protected GridView _view;
  3         protected ArrayList selection;
  4         GridColumn column;
  5         RepositoryItemCheckEdit edit;
  6         const int CheckboxIndent = 4;
  7 
  8         public GridCheckMarksSelection()           {
  9             selection = new ArrayList();
 10         }
 11 
 12         public GridCheckMarksSelection(GridView view) : this() {
 13             View = view;
 14         }
 15         public GridView View {
 16             get { return _view; }
 17             set {
 18                 if (_view != value) {
 19                     Detach();
 20                     Attach(value);
 21                 }
 22             }
 23         }
 24         public GridColumn CheckMarkColumn { get { return column; } }
 25 
 26         public int SelectedCount { get { return selection.Count; } }
 27         public object GetSelectedRow(int index) {
 28             return selection[index];
 29         }
 30         public int GetSelectedIndex(object row) {
 31             return selection.IndexOf(row);
 32         }
 33         public void ClearSelection() {
 34             selection.Clear();
 35             Invalidate();
 36         }
 37         public void SelectAll() {
 38             selection.Clear();
 39             // fast (won't work if the grid is filtered)
 40             //if(_view.DataSource is ICollection)
 41             //    selection.AddRange(((ICollection)_view.DataSource));
 42             //else
 43             // slow:
 44             for (int i = 0; i < _view.DataRowCount; i++)
 45                 selection.Add(_view.GetRow(i));
 46             Invalidate();
 47         }
 48         public void SelectGroup(int rowHandle, bool select) {
 49             if (IsGroupRowSelected(rowHandle) && select) return;
 50             for (int i = 0; i < _view.GetChildRowCount(rowHandle); i++) {
 51                 int childRowHandle = _view.GetChildRowHandle(rowHandle, i);
 52                 if (_view.IsGroupRow(childRowHandle))
 53                     SelectGroup(childRowHandle, select);
 54                 else
 55                     SelectRow(childRowHandle, select, false);
 56             }
 57             Invalidate();
 58         }
 59         public void SelectRow(int rowHandle, bool select) {
 60             SelectRow(rowHandle, select, true);
 61         }
 62         public void InvertRowSelection(int rowHandle) {
 63             if (View.IsDataRow(rowHandle)) {
 64                 SelectRow(rowHandle, !IsRowSelected(rowHandle));
 65             }
 66             if (View.IsGroupRow(rowHandle)) {
 67                 SelectGroup(rowHandle, !IsGroupRowSelected(rowHandle));
 68             }
 69         }
 70         public bool IsGroupRowSelected(int rowHandle) {
 71             for (int i = 0; i < _view.GetChildRowCount(rowHandle); i++) {
 72                 int row = _view.GetChildRowHandle(rowHandle, i);
 73                 if (_view.IsGroupRow(row)) {
 74                     if (!IsGroupRowSelected(row)) return false;
 75                 } else
 76                     if (!IsRowSelected(row)) return false;
 77             }
 78             return true;
 79         }
 80         public bool IsRowSelected(int rowHandle) {
 81             if (_view.IsGroupRow(rowHandle))
 82                 return IsGroupRowSelected(rowHandle);
 83 
 84             object row = _view.GetRow(rowHandle);
 85             return GetSelectedIndex(row) != -1;
 86         }
 87 
 88         protected virtual void Attach(GridView view) {
 89             if (view == null) return;
 90             selection.Clear();
 91             this._view = view;
 92             view.BeginUpdate();
 93             try {
 94                 edit = view.GridControl.RepositoryItems.Add("CheckEdit") as RepositoryItemCheckEdit;
 95 
 96                 column = view.Columns.Add();
 97                 column.OptionsColumn.AllowSort = DevExpress.Utils.DefaultBoolean.False;
 98                 column.Visible = true;
 99                 column.VisibleIndex = 0;
100                 column.FieldName = "CheckMarkSelection";
101                 column.Caption = "Mark";
102                 column.OptionsColumn.ShowCaption = false;
103                 column.OptionsColumn.AllowEdit = false;
104                 column.OptionsColumn.AllowSize = false;
105                 column.UnboundType = DevExpress.Data.UnboundColumnType.Boolean;
106                 column.Width = GetCheckBoxWidth();
107                 column.ColumnEdit = edit;
108 
109                 view.Click += new EventHandler(View_Click);
110                 view.CustomDrawColumnHeader += new ColumnHeaderCustomDrawEventHandler(View_CustomDrawColumnHeader);
111                 view.CustomDrawGroupRow += new RowObjectCustomDrawEventHandler(View_CustomDrawGroupRow);
112                 view.CustomUnboundColumnData += new CustomColumnDataEventHandler(view_CustomUnboundColumnData);
113                 view.KeyDown += new KeyEventHandler(view_KeyDown);
114                 view.RowStyle += new RowStyleEventHandler(view_RowStyle);
115             } finally {
116                 view.EndUpdate();
117             }
118         }
119         protected virtual void Detach() {
120             if (_view == null) return;
121             if (column != null)
122                 column.Dispose();
123             if (edit != null) {
124                 _view.GridControl.RepositoryItems.Remove(edit);
125                 edit.Dispose();
126             }
127 
128             _view.Click -= new EventHandler(View_Click);
129             _view.CustomDrawColumnHeader -= new ColumnHeaderCustomDrawEventHandler(View_CustomDrawColumnHeader);
130             _view.CustomDrawGroupRow -= new RowObjectCustomDrawEventHandler(View_CustomDrawGroupRow);
131             _view.CustomUnboundColumnData -= new CustomColumnDataEventHandler(view_CustomUnboundColumnData);
132             _view.KeyDown -= new KeyEventHandler(view_KeyDown);
133             _view.RowStyle -= new RowStyleEventHandler(view_RowStyle);
134 
135             _view = null;
136         }
137         protected int GetCheckBoxWidth() {
138             DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo info = edit.CreateViewInfo() as DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo;
139             int width = 0;
140             GraphicsInfo.Default.AddGraphics(null);
141             try {
142                 width = info.CalcBestFit(GraphicsInfo.Default.Graphics).Width;
143             } finally {
144                 GraphicsInfo.Default.ReleaseGraphics();
145             }
146             return width + CheckboxIndent * 2;
147         }
148         protected void DrawCheckBox(Graphics g, Rectangle r, bool Checked) {
149             DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo info;
150             DevExpress.XtraEditors.Drawing.CheckEditPainter painter;
151             DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs args;
152             info = edit.CreateViewInfo() as DevExpress.XtraEditors.ViewInfo.CheckEditViewInfo;
153             painter = edit.CreatePainter() as DevExpress.XtraEditors.Drawing.CheckEditPainter;
154             info.EditValue = Checked;
155             info.Bounds = r;
156             info.CalcViewInfo(g);
157             args = new DevExpress.XtraEditors.Drawing.ControlGraphicsInfoArgs(info, new DevExpress.Utils.Drawing.GraphicsCache(g), r);
158             painter.Draw(args);
159             args.Cache.Dispose();
160         }
161         void Invalidate() {
162             _view.CloseEditor();
163             _view.BeginUpdate();
164             _view.EndUpdate();
165         }
166         void SelectRow(int rowHandle, bool select, bool invalidate) {
167             if (IsRowSelected(rowHandle) == select) return;
168             object row = _view.GetRow(rowHandle);
169             if (select)
170                 selection.Add(row);
171             else
172                 selection.Remove(row);
173             if (invalidate) {
174                Invalidate();
175             }
176         }
177         void view_CustomUnboundColumnData(object sender, CustomColumnDataEventArgs e) {
178             if (e.Column == CheckMarkColumn) {
179                 if (e.IsGetData)
180                     e.Value = IsRowSelected(View.GetRowHandle(e.ListSourceRowIndex));
181                 else
182                     SelectRow(View.GetRowHandle(e.ListSourceRowIndex), (bool)e.Value);
183             }
184         }
185         void view_KeyDown(object sender, KeyEventArgs e) {
186             if (View.FocusedColumn != column || e.KeyCode != Keys.Space) return;
187             InvertRowSelection(View.FocusedRowHandle);
188         }
189         void View_Click(object sender, EventArgs e) {
190             GridHitInfo info;
191             Point pt = _view.GridControl.PointToClient(Control.MousePosition);
192             info = _view.CalcHitInfo(pt);
193             if (info.Column == column) {
194                 if (info.InColumn) {
195                     if (SelectedCount == _view.DataRowCount)
196                         ClearSelection();
197                     else
198                         SelectAll();
199                 }
200                 if (info.InRowCell) {
201                     InvertRowSelection(info.RowHandle);
202                 }
203             }
204             if (info.InRow && _view.IsGroupRow(info.RowHandle) && info.HitTest != GridHitTest.RowGroupButton) {
205                 InvertRowSelection(info.RowHandle);
206             }
207         }
208         void View_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e) {
209             if (e.Column == column) {
210                 e.Info.InnerElements.Clear();
211                 e.Painter.DrawObject(e.Info);
212                 DrawCheckBox(e.Graphics, e.Bounds, SelectedCount == _view.DataRowCount);
213                 e.Handled = true;
214             }
215         }
216         void View_CustomDrawGroupRow(object sender, RowObjectCustomDrawEventArgs e) {
217             DevExpress.XtraGrid.Views.Grid.ViewInfo.GridGroupRowInfo info;
218             info = e.Info as DevExpress.XtraGrid.Views.Grid.ViewInfo.GridGroupRowInfo;
219 
220             info.GroupText = "         " + info.GroupText.TrimStart();
221             e.Info.Paint.FillRectangle(e.Graphics, e.Appearance.GetBackBrush(e.Cache), e.Bounds);
222             e.Painter.DrawObject(e.Info);
223 
224             Rectangle r = info.ButtonBounds;
225             r.Offset(r.Width + CheckboxIndent * 2 - 1, 0);
226             DrawCheckBox(e.Graphics, r, IsGroupRowSelected(e.RowHandle));
227             e.Handled = true;
228         }
229         void view_RowStyle(object sender, RowStyleEventArgs e) {
230             if (IsRowSelected(e.RowHandle)) {
231                 e.Appearance.BackColor = SystemColors.Highlight;
232                 e.Appearance.ForeColor = SystemColors.HighlightText;
233             }
234         }
235     }
      GridCheckMarksSelection类
    2. 使用方法
      1 public Form1()
2  {
3       InitializeComponent();
4       new GridCheckMarksSelection(gridView1);
5   }
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  • 原文地址：https://www.cnblogs.com/kelite/p/3985314.html
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