Winform 中 原生Grid 控件增加 全选列
帮助类 部分
//定义触发单击事件的委托 public delegate void DatagridviewcheckboxHeaderEventHander(object sender, DatagridviewCheckboxHeaderEventArgs e); //定义包含列头checkbox选择状态的参数类 public class DatagridviewCheckboxHeaderEventArgs : EventArgs { public DatagridviewCheckboxHeaderEventArgs() { CheckedState = false; } public bool CheckedState { get; set; } } //定义继承于DataGridViewColumnHeaderCell的类,用于绘制checkbox,定义checkbox鼠标单击事件 class DatagridviewCheckboxHeaderCell : DataGridViewColumnHeaderCell { Point checkBoxLocation; Size checkBoxSize; bool _checked = false; Point _cellLocation = new Point(); System.Windows.Forms.VisualStyles.CheckBoxState _cbState = System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal; public event DatagridviewcheckboxHeaderEventHander OnCheckBoxClicked; //绘制列头checkbox protected override void Paint(System.Drawing.Graphics graphics, System.Drawing.Rectangle clipBounds, System.Drawing.Rectangle cellBounds, int rowIndex, DataGridViewElementStates dataGridViewElementState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts) { base.Paint(graphics, clipBounds, cellBounds, rowIndex, dataGridViewElementState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts); Point p = new Point(); Size s = CheckBoxRenderer.GetGlyphSize(graphics, System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal); p.X = cellBounds.Location.X + (cellBounds.Width / 2) - (s.Width / 2) - 1;//列头checkbox的X坐标 p.Y = cellBounds.Location.Y + (cellBounds.Height / 2) - (s.Height / 2);//列头checkbox的Y坐标 _cellLocation = cellBounds.Location; checkBoxLocation = p; checkBoxSize = s; if (_checked) _cbState = System.Windows.Forms.VisualStyles. CheckBoxState.CheckedNormal; else _cbState = System.Windows.Forms.VisualStyles. CheckBoxState.UncheckedNormal; CheckBoxRenderer.DrawCheckBox (graphics, checkBoxLocation, _cbState); } /// <summary> /// 点击列头checkbox单击事件 /// </summary> protected override void OnMouseClick(DataGridViewCellMouseEventArgs e) { var p = new Point(e.X + _cellLocation.X, e.Y + _cellLocation.Y); if (p.X >= checkBoxLocation.X && p.X <= checkBoxLocation.X + checkBoxSize.Width && p.Y >= checkBoxLocation.Y && p.Y <= checkBoxLocation.Y + checkBoxSize.Height) { _checked = !_checked; //获取列头checkbox的选择状态 var ex = new DatagridviewCheckboxHeaderEventArgs { CheckedState = _checked }; var sender = new object();//此处不代表选择的列头checkbox,只是作为参数传递。应该列头checkbox是绘制出来的,无法获得它的实例 if (OnCheckBoxClicked != null) { OnCheckBoxClicked(sender, ex);//触发单击事件 this.DataGridView.InvalidateCell(this); } } base.OnMouseClick(e); } }
Form 部分
/// <summary> ///给DataGridView添加checkbox列头 /// </summary> private void AddCheckboxCell() { DatagridviewCheckboxHeaderCell ch = new DatagridviewCheckboxHeaderCell(); ch.OnCheckBoxClicked += new DatagridviewcheckboxHeaderEventHander(ch_OnCheckBoxClicked); //第一列为DataGridViewCheckBoxColumn DataGridViewCheckBoxColumn checkboxCol = new DataGridViewCheckBoxColumn(); checkboxCol.MinimumWidth = 50; checkboxCol.HeaderCell = ch; checkboxCol.HeaderCell.Value = string.Empty; //消除列头checkbox旁出现的文字 this.DGV_CloudCodePrint.Columns.Insert(0, checkboxCol); } /// <summary> /// 单击事件 /// </summary> private void ch_OnCheckBoxClicked(object sender, DatagridviewCheckboxHeaderEventArgs e) { foreach (DataGridViewRow dgvRow in this.DGV_CloudCodePrint.Rows) { dgvRow.Cells[0].Value = e.CheckedState; } this.DGV_CloudCodePrint.RefreshEdit(); }