DataGridView中没有中有checkboxcolumn,但是该column不是checkbox的列头,这让人很郁闷,关于这个问题有3种解决方法,这里介绍一种比较暴力的方法,手画checkboxcolumnheader.

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#region datagridview列头加checkbox
public 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 CheckBoxClickedHandler OnCheckBoxClicked;

public DatagridViewCheckBoxHeaderCell()
{
}

public bool Checked
{
get { return _checked; }
set
{
_checked = value;
//OnCheckBoxClicked(_checked);
this.DataGridView.InvalidateCell(this);
}
}

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,
"", 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);
p.Y = cellBounds.Location.Y +
(cellBounds.Height / 2) - (s.Height / 2);
_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);
}

protected override void OnMouseClick(DataGridViewCellMouseEventArgs e)
{
Point 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;
if (OnCheckBoxClicked != null)
{
OnCheckBoxClicked(_checked);
this.DataGridView.InvalidateCell(this);
}
}
base.OnMouseClick(e);
}
}
public delegate void CheckBoxClickedHandler(bool State);
public class DataGridViewCheckBoxHeaderCellEventArgs : EventArgs
{
bool _bChecked;
public DataGridViewCheckBoxHeaderCellEventArgs(bool bChecked)
{
_bChecked = bChecked;
}
public bool Checked
{
get { return _bChecked; }
}
}
#endregion

　　//窗体运行时更新DataGridView
　　public void Form_Load()
　　{
　　　　DatagridViewCheckBoxHeaderCell dgvcCheckBox = new DatagridViewCheckBoxHeaderCell();
　　　　dgvcCheckBox.OnCheckBoxOnClicked += new CheckBoxClickedHandler(HeaderCellChecked);//注册列头的checkbox选中事件
　　　　dgvDataGridVew.Columns["Checked"].HeaderCell = dgvcCheckBox;//设置checkbox列列头cell为我们画的那个checkbox列头
　　}
　　public void HeaderCellChecked(object sender, DataGridViewCheckBoxHeaderCellEventArgs e)
　　{
　　　　//代码
　　}