title: don't show zero ("0") in datagridview cell in c#
body: <p>I used string.format() for a column in datagridview to separate thousands with comma but</p>
  
  <p>in cases that the value is zero "0" the datagridview's cell don't show  zero and cell is empty</p>
  
  <p>dataGridView2.Columns[7].ValueType = typeof(string);</p>
  
  <p>dataGridView2.Columns[7].DefaultCellStyle.Format = string.Format("#,#", System.Globalization.CultureInfo.InvariantCulture) ; </p>
  
  <p>please help me </p>
  
  <p>regards</p>