Gridview标题行dropdownlist问题，请教

Question

有个需求是Excel的记录导入到数据表，但是Excel列数不定，需要从标题行选择导入到数据表的哪个字段中（就像sql的导入功能）：
请教，我从Excel导入至Dataset，然后动态绑定到GridView，怎样在标题行动态的添加dropdownlist（dropdownlist里面的选择项固定）呢？谢谢

Answer 1

 protected void Button1_Click(object sender, EventArgs e)
    {
        if (FileUpload1.HasFile == false)
        {
            Response.Write("<script>alter('请选择Excel文件')</scirpt>");
            return;
        }
        string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower();
        if (IsXls != ".xls")
        {
            Response.Write("<script>alter('只可以选择Excel文件')</scirpt>");
            return;
        }
        SqlConnection con = new SqlConnection(str);
         con.Open();
         string filename = DateTime.Now.ToString("yyyymmddhhMMss") + FileUpload1.FileName;
         string savepath = Server.MapPath(("~\\updown\\")+filename);
         FileUpload1.SaveAs(savepath);
         DataSet ds = ExcleDs(savepath,filename);
         DataRow[] dr = ds.Tables[0].Select();
         int rowsum = ds.Tables[0].Rows.Count;
         if (rowsum == 0)
         { Response.Write("<script>alter('Excel为空数据')</scirpt>"); }
         else
         {
             for (int i = 0; i < dr.Length; i++)
             {
                 string hhaspx_rq = dr[i]["日期"].ToString();//日期 excel列名【名称不能变,否则就会出错】
                 string hhaspx_bh = dr[i]["编号"].ToString();//编号 列名 以下类似
                 string hhaspx_xm = dr[i]["姓名"].ToString();
                 string hhaspx_dx = dr[i]["底薪"].ToString();
                 string hhaspx_kh = dr[i]["考核"].ToString();
                 string hhaspx_jl = dr[i]["奖励"].ToString();
                 string hhaspx_jt = dr[i]["津贴"].ToString();
                 string hhaspx_jb = dr[i]["加班"].ToString();
                 string hhaspx_zb = dr[i]["值班"].ToString();
                 string hhaspx_jx = dr[i]["绩效"].ToString();
                 string hhaspx_hj = dr[i]["合计"].ToString();
                 string sqlcheck = "select count(*) from hhaspx_gz where hhaspx_rq='" + hhaspx_rq + "'And hhaspx_xm='" + hhaspx_xm + "'";  //检查用户是否存在
                 SqlCommand sqlcmd = new SqlCommand(sqlcheck, con);
                 int count = Convert.ToInt32(sqlcmd.ExecuteScalar());
                 if (count < 1)
                 {
                     string insertstr = "insert into hhaspx_gz (hhaspx_rq,hhaspx_bh,hhaspx_xm,hhaspx_dx,hhaspx_kh,hhaspx_jl,hhaspx_jt,hhaspx_jb,hhaspx_zb,hhaspx_jx,hhaspx_hj) values('" + hhaspx_rq + "','" + hhaspx_bh + "','" + hhaspx_xm + "','" + hhaspx_dx + "','" + hhaspx_kh + "','" + hhaspx_jl + "','" + hhaspx_jt + "','" + hhaspx_jb + "','" + hhaspx_zb + "','" + hhaspx_jx + "','" + hhaspx_hj + "')";                     SqlCommand cmd = new SqlCommand(insertstr, con);
                     try
                     {
                         cmd.ExecuteNonQuery();
                     }
                     catch (MembershipCreateUserException ex)       //捕捉异常
                     {
                         Response.Write("<script>alert('导入内容:" + ex.Message + "')</script>");
                     }
                 }
                 else
                 {
                     Response.Write("<script>alert('内容重复！禁止导入');location='default.aspx'</script></script> ");
                     continue;
                 }             }
             Response.Write("<script>alert('Excle表导入成功!');location='default.aspx'</script>");
         }
         con.Close();

Answer 2

非常感谢wxd_860825，不过Excel导入到DataSet已经实现了，现在就是动态加载DropDownList出现问题，这个请教该怎样做呢？谢谢

Answer 3

一个Demo，动态给标题行加dropdownlist，具体根据你的需求再更改 <asp:GridView runat="server" ID="gv1" onrowdatabound="gv1_RowDataBound">
      </asp:GridView>
 protected void Page_Load(object sender, EventArgs e)
    {
        this.gv1.DataSource = new string[] { "1", "2", "3" };
        this.gv1.DataBind();
    }    protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Header)
        {
            DropDownList ddl = new DropDownList();
            ddl.Items.Add("11");
            ddl.Items.Add("22");            e.Row.Cells[0].Controls.Add(ddl);
        }
    }