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DevExpress Grid使用checkBox选中的方法

时间:2014-09-22 02:27:01      阅读:362      评论:0      收藏:0      [点我收藏+]

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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
    bubuko.com,布布扣
      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   }

     

DevExpress Grid使用checkBox选中的方法

标签:style   blog   http   color   io   os   使用   ar   for   

原文地址:http://www.cnblogs.com/kelite/p/3985314.html

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