C# DataGridViewCheckBoxColumn Hide/Gray-Out

Question

I have a DataGridView with several columns and several rows of data. One of the columns is a DataGridViewCheckBoxColumn and (based on the other dat

Answer 1

Taken from Customize the Appearance of Cells in the Windows Forms DataGridView Control, you could catch the CellPainting event and not draw the cell if its in read only mode. For example:

public Form1()
{
   InitializeComponent();
   dataGridView1.CellPainting += new 
      DataGridViewCellPaintingEventHandler(dataGridView1_CellPainting);
}

private void dataGridView1_CellPainting(object sender,
   System.Windows.Forms.DataGridViewCellPaintingEventArgs e)
{
   // Change 2 to be your checkbox column #
   if (this.dataGridView1.Columns[2].Index == e.ColumnIndex && e.RowIndex >= 0)
   {
      // If its read only, dont draw it
      if (dataGridView1[e.ColumnIndex, e.RowIndex].ReadOnly)
      {
         // You can change e.CellStyle.BackColor to Color.Gray for example
         using (Brush backColorBrush = new SolidBrush(e.CellStyle.BackColor))
         {
            // Erase the cell.
            e.Graphics.FillRectangle(backColorBrush, e.CellBounds);
            e.Handled = true;
         }
      }
   }
}

The only caveat is that you need to call dataGridView1.Invalidate(); when you change the ReadOnly property of one of the DataGridViewCheckBox cell's.