得不到datagrid中一列的数据string s=E.Item.Cells [0].Text .ToString ();该怎么处理

得不到datagrid中一列的数据string s=E.Item.Cells [0].Text .ToString ();
string   s=E.Item.Cells   [0].Text   .ToString   ();
s得不到数据，不知道是为什么


public   void   BindGrid()
{ //从文件Web.config中读取连接字符串
string   strconn=   ConfigurationSettings.AppSettings[ "dsn "];
//连接本地计算机的MMS数据库
SqlConnection   cn=   new   SqlConnection   (strconn);
//创建SqlDataAdapter对象,调用存储过程
SqlDataAdapter   da=new   SqlDataAdapter   ( "employlist ",cn);
//创建并填充DataSet
DataSet   ds=new   DataSet   ();
da.Fill   (ds);
dgd_employlist.DataSource   =ds;
dgd_employlist.DataBind   ();
cn.Close   ();
}


private   void   dgd_employlist_DeleteCommand(object   sender,   DataGridCommandEventArgs   E)
{
string   conn=   ConfigurationSettings.AppSettings[ "dsn "];
//连接本地计算机的MMS数据库
SqlConnection   cn2=   new   SqlConnection   (conn);
cn2.Open   ();
string   empoydelete= "delete   from   employ   where   eno=@eno ";
SqlCommand   cm=new   SqlCommand   (empoydelete,cn2);
cm.Parameters   .Add   ( "@eno ",SqlDbType.VarChar   );
//从DateGrid中取得更新内容
//Cells   [0]为UID列
string   s=E.Item.Cells   [0].Text   .ToString   ();
cm.Parameters   [ "@eno "].Value   =s;
cm.ExecuteNonQuery   ();
cn2.Close();
dgd_employlist.EditItemIndex   =-1;
BindGrid();
Label1.Text= "调出人员为\n "+   s;
}

------解决方案--------------------------------------------------------
超级衔接列好象是有这个问题的
那你把这列帮定到隐藏列里,再取隐藏列的值吧