title: Get cell value using row index and column index c#
body: <p>I am trying to delete a user through his ID by selecting a cell/row in the DataGridview and then clicking on the delete button. I tried to get the ID by using the row index and column index. However, I am not able to delete the user as the value of 'string id' is NULL even when my datagridview contains rows. </p>
  
  <pre><code>private void buttonDeleteUser_Click(object sender, EventArgs e)
  {
     int rowindex = dataGridView1.CurrentCell.RowIndex;
     int columnindex = 0;
     string id = dataGridView1[rowindex, columnindex].Value.ToString();
     controller_employee.delete_employee(Int32.Parse(id));
  }
  </code></pre>
  
  <p>Why is it NULL and what can I do to resolve this?</p>