Question

I have a DataGridView having one DataGridViewComboBoxColumn and I have populated that ComboBox but after clear that DataGridView I have to set one default value for that ComboBox So please help me out.

Answer 1

You can do this in CellFormatting event

void dataGridView_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
      if (e.ColumnIndex == 0) //Index of your DataGridViewComboBoxColumn 
      {
          e.Value = "Default Value";
      }
}