求高手解答，．ｎｅｔ程序网页问题，控件显示不全 求解释

Question

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<div id="head_right_1" >
      欢迎您  <asp:Label ID="lab_name" runat="server" ForeColor="Red" ></asp:Label>  来到评教系统，请您对各科教师进行评分！
        &nbsp; &nbsp;<asp:Button ID="btn_back" runat="server" CssClass="btn"
            Text="退出重新登陆" OnClick="btn_back_Click" CausesValidation="False" />
            
            </div>
            <div id="head_right_2">
              
<asp:GridView id="dvt" runat="server" Width="790px" AutoGenerateColumns="False" 
OnRowEditing="dvt_RowEditing" BorderWidth="2px" CellPadding="3" CellSpacing="1" BorderStyle="Ridge"><Columns>
<asp:BoundField DataField="teaNum" HeaderText="教师编号"></asp:BoundField>
<asp:BoundField DataField="teaName" HeaderText="教师姓名"></asp:BoundField>
<asp:BoundField DataField="teaItem" HeaderText="所授课程"></asp:BoundField>
<asp:BoundField DataField="teaClass" HeaderText="所教班级"></asp:BoundField>
<asp:CommandField EditText="点击进行评教" ShowEditButton="True"></asp:CommandField>
</Columns>
</asp:GridView>    
            </div>
    
            
</asp:Content>
<asp:Content ID="Content3" runat="server" ContentPlaceHolderID="ContentPlaceHolder2">
    <uc1:stuLeft ID="StuLeft1" runat="server" />    </asp:Content>
教师编号教师姓名不显示　求解释

Answer 1

你确定你的DataField所要查询的字段都正确

Answer 2

div id="head_right_1" 显示了 
div id="head_right_2  不显示

Answer 3

在VS中也没有显示出来么？   
不应该把。  把DIV去掉 然后看下。   

Answer 4

你是怎么绑定gridview的？是在cs页面中动态绑定的还是用了数据源控件绑定的？如果是在cs页面中动态绑定的，贴绑定的代码上来，看看是不是代码出问题了

Answer 5

public partial class stu_stupj : System.Web.UI.Page
{
    Comsone com = new Comsone();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["stuNum"] != null)
        {
            if(!IsPostBack)
            {
                databin();
            }
        }
        else
        {
            Response.Redirect("../index.aspx");
        }
    }
    protected void databin()
    {
        string stuNum = Request.QueryString["stuNum"].ToString();
        string sqlsel = "select * from stu where stuNum='" + stuNum + "'";
        DataTable dt = com.GetDataTable(sqlsel);
        lab_name.Text = dt.Rows[0]["stuName"].ToString();
        string str = dt.Rows[0]["stuClass"].ToString();
        string sqlsel1 = "select teaNum,teaName,teaItem,teaClass from tea,stu where teaNum in (select teaNum from flag where flag='0'and stuNum='" + stuNum + "') and stuClass='" + str + "'and stuNum='" + stuNum + "'";
        dvt.DataSource = com.GetDataTable(sqlsel1);        dvt.DataBind();    }    protected void btn_back_Click(object sender, EventArgs e)
    {
        Response.Redirect("../index.aspx");
    }
    protected void dvt_RowEditing(object sender, GridViewEditEventArgs e)
    {
        System.Threading.Thread.Sleep(3000);
        string teaNum = dvt.DataKeys[e.NewEditIndex].Value.ToString();
        Session["tea"] = teaNum;
        Response.Redirect("pjtea.aspx?teaNum=" + teaNum);
    }
}
后天代码