//以下代码实现的是在父类窗体中为子类窗体中的datagrid控件添加mousedown mouseup事件。//父类窗体中的方法private void Form_SearchBase_Load(object sender, System.EventArgs e)
......{
Auto AddEvent MouseDown MouseUpAuto AddEvent MouseDown MouseUp#region Auto AddEvent MouseDown MouseUp foreach ( object obj in panel2.Controls ) ......{ if (obj.GetType().ToString() == "System.Windows.Forms.DataGrid") ......{ Type t = typeof(System.Windows.Forms.DataGrid); PropertyInfo pi = t.GetProperty("Events", BindingFlags.NonPublic| BindingFlags.Instance); EventHandlerList el = (EventHandlerList)pi.GetValue(obj,null); FieldInfo fiA = t.GetField("MouseDown", BindingFlags.NonPublic | BindingFlags.Static); FieldInfo fiB = t.GetField("MouseUp", BindingFlags.NonPublic | BindingFlags.Static); if (( fiA == null) || (fiB == null)) ......{ ((System.Windows.Forms.DataGrid)obj).MouseDown += new MouseEventHandler(this.dataGrid_PlanCase_Mouse); ((System.Windows.Forms.DataGrid)obj).MouseUp += new MouseEventHandler(this.dataGrid_PlanCase_Mouse); 
} else ......{ Delegate dA = el[fiA.GetValue(obj)]; Delegate dB= el[fiB.GetValue(obj)] ; if ( ( dA == null ) && ( dB == null)) ......{ ((System.Windows.Forms.DataGrid)obj).MouseDown += new MouseEventHandler(this.dataGrid_PlanCase_Mouse); ((System.Windows.Forms.DataGrid)obj).MouseUp += new MouseEventHandler(this.dataGrid_PlanCase_Mouse); } } } } #endregion
}//父类中的方法MouseAboutMouseAbout#region MouseAbout public void dataGrid_PlanCase_Mouse(object sender, System.Windows.Forms.MouseEventArgs e) ......{ foreach ( object obj in panel2.Controls ) ......{ if (obj.GetType().ToString() == "System.Windows.Forms.DataGrid") ......{ System.Windows.Forms.DataGrid.HitTestInfo hti=((System.Windows.Forms.DataGrid)obj) .HitTest (e.X ,e.Y ); if(e.Button == System.Windows .Forms .MouseButtons .Left ) ......{ if(hti.Type == System.Windows.Forms.DataGrid.HitTestType.Cell) ......{ HighlightRow(((System.Windows.Forms.DataGrid)obj), hti.Row,hti.Column ); } } } } } HighlightRow DateGridHighlightRow DateGrid#region HighlightRow DateGrid public void HighlightRow(System.Windows.Forms.DataGrid _Grid,int _row,int _col) ......{ int CurrentRow = _Grid.CurrentCell.RowNumber; if (ModifierKeys == Keys.Shift) ...{ int _i=0,_j=0, _Top =0, _Bottom=0; _i =CurrentRow; //获得最后一次点击的行 _j = _LastSelectRow; if ( (_i != _j )) ...{ _Top = _i; _Bottom =_j; GetSelectRows(_Grid); UnSelectRows(_Grid); } //判断应该正序还是倒序 _i = System.Math.Min(_Top,_Bottom); _j = System.Math.Max(_Top,_Bottom); int i=_i ; while (i<=_j) ...{ _Grid .Select( i ); i++; } _Grid .CurrentCell = new DataGridCell( _Bottom, _col ); } else if( Control.ModifierKeys == Keys.Control) ...{ int _i=0,_j=0; _i = Convert.ToInt32( System.Math.Min (CurrentRow,_LastSelectRow) ); _j = Convert.ToInt32( System.Math.Max(CurrentRow,_LastSelectRow) ); //将所有选择过的行全部保存 if ( _i != _j ) ...{ GetSelectRows(_Grid); UnSelectRows(_Grid); } foreach(object obj in _SelectRows) ...{ _Grid .Select( Convert.ToInt32( obj ) ); } _Grid .Select( _j ); _Grid .CurrentCell = new DataGridCell( _j, _col ); } else ...{ _Grid.UnSelect(CurrentRow); _Grid .CurrentCell = new DataGridCell( _row, _col ); _Grid .Select ( _row ); _LastSelectRow = _row; ClearSaveValue(); } } private void ClearSaveValue() ......{ _Top =0; _Bottom=0; _SelectRows.Clear(); } /**//**//**//// <summary> /// 得到所有被选中的行 /// </summary> /// <param name="_Grid"></param> private void GetSelectRows(System.Windows.Forms.DataGrid _Grid) ......{ System.Data.DataTable _Table; // Assumes the DataGrid is bound to a DataTable. if (_Grid.DataSource == null) ......{ return ; } else ......{
作者: holla
- 该日志由 holla 于11年前发表在综合分类下，最后更新于 2013年03月23日.
- 转载请注明: 如何在父类中为子类添加事件 | 学步园 +复制链接
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