参与程序http://www.codeproject.com/KB/grid/CheckBoxHeaderCell.aspx 这里老外写的一个控件，他少了委托重载的一个方法。先写一个控件
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public
delegate void CheckBoxClickedHandler(bool
state);
public
class DataGridViewCheckBoxHeaderCellEventArgs : EventArgs
{
bool
_bChecked;
public
DataGridViewCheckBoxHeaderCellEventArgs(bool
bChecked)
{
_bChecked = bChecked;
}
public
bool Checked
{
get
{ return
_bChecked; }
}
}
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()
{
}
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);
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);
}
}
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然后在前台做个窗体，加个datagridview控件，加个几行，注意datagirdview有编辑状态，如果只有一行又是在编辑状态，就不起作用了。当然一般全选控件不可能在编辑状态
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public
partial class Form1 : Form
{
public
Form1()
{
InitializeComponent();
}
private
void Form1_Load(object
sender, EventArgs e)
{
//DataGridViewCheckBoxColumn colCB = new DataGridViewCheckBoxColumn();
DatagridViewCheckBoxHeaderCell cbHeader = new
DatagridViewCheckBoxHeaderCell();
//colCB.HeaderCell = cbHeader;
//dataGridView1.Columns.Add(colCB);
cbHeader.Value = string.Empty;
cbHeader.OnCheckBoxClicked += new
CheckBoxClickedHandler(cbHeader_OnCheckBoxClicked);
dataGridView1.Columns[0].HeaderCell = cbHeader;
}
private
void cbHeader_OnCheckBoxClicked(bool
state)
{
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dgvWarn.EndEdit();
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if
(dataGridView1.Rows.Count > 0)
{
for
(int
i = 0; i < dataGridView1.Rows.Count; i++)
{
dataGridView1.Rows[i].Cells[0].Value = state;
}
}
}
} |