Saturday, June 15, 2013
This is my version of a class that displays a check box in a DataGridView Header cell.
This is based on the code from http://social.msdn.microsoft.com/Forums/en-US/winformsdatacontrols/thread/827907ea-c529-4254-9b15-2e6d571f5c5b
It assumes that the check box is located in the first DataGridView
column. It allows for column caption and provides built-in
check/uncheck functionality. Play with x and y parameters to place the
checkbox where you want in the header cell.
Here is a usage example:
DataGridViewColumn column = new DataGridViewCheckBoxColumn();
CheckBox ckBoxMaster = CheckBoxInHeader.CreateCheckBoxInHeader(column, 12, 4, " Select All");
DataGridView1.Controls.Add(ckBoxMaster);
The class listing:
class CheckBoxInHeader
{
public static CheckBox CreateCheckBoxInHeader(DataGridViewColumn column, int x, int y, string caption)
{
CheckBoxInHeader cbInHeader = new CheckBoxInHeader();
CheckBox ckBox = cbInHeader.CreateCheckBox(column, x, y, caption);
ckBox.CheckedChanged += new EventHandler(cbInHeader.ckBox_CheckedChanged);
return ckBox;
}
private CheckBox CreateCheckBox(DataGridViewColumn column, int x, int y, string caption)
{
CheckBox ckBox = new CheckBox();
//Get the column header cell bounds
Rectangle rect = column.DataGridView.GetCellDisplayRectangle(0, -1, true);
ckBox.Size = new Size(18, 18);
//play with check box position
rect.Offset(x, y);
//Change the location of the CheckBox to make it stay on the header
ckBox.Location = rect.Location;
column.Name = caption;
return ckBox;
}
private void ckBox_CheckedChanged(object sender, EventArgs e)
{
CheckBox cb = sender as CheckBox;
DataGridView dgv = (DataGridView)cb.Parent;
foreach (DataGridViewRow row in dgv.Rows)
row.Cells[0].Value = cb.Checked;
}
}
}
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