title: GridView doesn't show data
body: <pre><code>private void fill()
  {
    adptr = new OleDbDataAdapter(@"SELECT * FROM LibraryInfo WHERE First_Name='"+LoginName+"'", cn);      
    //LoginName is a string variable for displaying users info after the login          
    ds.Clear();
    adptr.Fill(ds);
    dataGridView1.DataSource = "";
    dataGridView1.DataSource = ds.Tables[0];
  }
  </code></pre>
  
  <p>After the database updated, GridView didn't show data.</p>