title: datagrid view select row is not working
body: <p>I filled my gridview cell by cell without using datasource.
  when I reload one column after drag and drop some rows, this is not working:</p>
  
  <pre><code>row[6].Selected = true;
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/n1G1A.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/n1G1A.png" alt="]"></a></p>
  
  <p>and just turns the color of the row to blue for selected thing, so when I call if any row was selected it returns me null! and that's because of a sign in default column in gridview which is like pointer to each row. and then when I click on the row for selecting row manually it shows up again.</p>
  
  <p>So now <strong>my question is how to enable that sign for selecting process</strong>.</p>
  
  <p><a href="https://i.stack.imgur.com/2RHis.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2RHis.png" alt="6"></a></p>