title: zero values instead of negative values in data grid view
body: <p>I want to get rid of having negative values on the datagrid and I only want to show that once the item goes out of stock it will only show zero instead of -4 </p>
  
  <p>things to consider:
  - I call my datagridview manually here:</p>
  
  <pre><code>void GetInventory()
  {
      using (SqlConnection con = new SqlConnection(Helper.GetConnection()))
      {
          con.Open();
          string query = @"SELECT * FROM InventoryTable";
          using (SqlCommand cmd = new SqlCommand(query, con))
          {
              using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
              {
                  DataTable dt = new DataTable();
                  sda.Fill(dt);
  
                  dgvItem.DataSource = dt;
              }
  
          }
  
      }
  }
  </code></pre>