读不到模板列textbox的值

Question

 前台：
<asp:TemplateField HeaderText="使用次数">  
<ItemTemplate> <asp:TextBox ID="tb_checknums" runat="server" EnableViewState="true" Width="50px" ></asp:TextBox> </ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="机时数">  
<ItemTemplate> <asp:TextBox ID="tb_checkhours" runat="server"  EnableViewState="true" Width="50px"></asp:TextBox> </ItemTemplate>
</asp:TemplateField>后台
 protected void tbn_saveall_Click(object sender, EventArgs e)
    {
       foreach (GridViewRow gvrow in gv_checkinfor.Rows)
            {
                string dev_num = gvrow.Cells[2].Text.Trim();
                TextBox tb_dev_checknums = (TextBox)gvrow.FindControl("tb_checknums");
                TextBox tb_dev_checkhours = (TextBox)gvrow.FindControl("tb_checkhours");
                string dev_checknums = tb_dev_checknums.Text.Trim();
                string dev_checkhours = tb_dev_checkhours.Text.Trim();

Answer 1

    protected void Button1_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < GridView1.Rows.Count; i++) {
            CheckBox che = (CheckBox)GridView1.Rows[i].FindControl("check");
            
           if(che.Checked==true){
               string ss = GridView1.Rows[i].Cells[0].Text + "";
                CourseInfo cs = new CourseInfo();
               int schoose = Convert.ToInt32(ss);
               int id = Convert.ToInt32(Session["stuId"].ToString());
               StuCourse stu = new StuCourse ();
               stu.Courseinfo.CourseNo=schoose;
               stu.Stuinfo.StuNo=id;
               int row = StuCourseManager.Insert(stu);
               if (row > 0) {
                   Response.Write("<script>alert('添加成功！')</script>");
               }
                              CourseManager.Update(schoose);
               GerDate();            }            
        }
    }

Answer 2

你这个写法不大合适！把foreach 改成for的写法应该没问题