如何得到数据库中没有在GridView1前台显示的值?
protected void Page_Load(object sender, EventArgs e) 
  { 
  string sqlstr; 
   
  sqlstr = "select * from record"; 
  string connectionstring = "没写"; 
  SqlConnection conn1 = new SqlConnection(connectionstring); 
  SqlCommand cmd = new SqlCommand(sqlstr, conn1); 
  conn1.Open(); 
  GridView1.DataSource = cmd.ExecuteReader(); 
  GridView1.DataBind(); 
  } 
  dd.Close(); 
  } 

  }
protected void GridView1_DataBound(object sender, EventArgs e)
  {
  foreach (GridViewRow gvr in GridView1.Rows)
  {
  string text = gvr.Cells[3].Text;
  switch (text)
  {
  case "1":
  gvr.BackColor = System.Drawing.Color.FromName("#FFFFFF");
  break;
  case "2":
  gvr.BackColor = System.Drawing.Color.FromName("#000000");
  break;
  }
  }
  }

 //string text = gvr.Cells[3].Text;可以得到在GridView1中显示的第三列值,但在GridView1中没有显示的如何得到????比如表record中一个字段名 number,如何取的值?

------解决方案--------------------
有很多方法可以实现.比如:
1.设置GridView的某些列不显示,比如 GridView1.Columns[1].Visible = false,这样后台仍能取值.
2.在GridView的某个模板列"偷偷"塞进几个HiddenField.
3.把可能用到的列关键字设定在 DataKeyNames中.
等等.