.net 移动web开发按钮点击后后台事件里无法取到表单的值，始终为空。

如标题，这问题困扰了我很久，希望大哥大姐们积极响应，先谢谢！ --------------------编程问答-------------------- --------------------编程问答-------------------- --------------------编程问答-------------------- Login.aspx
<%@ Page Language="C#" AutoEventWireup="true" Inherits="W.Web.Login" CodeBehind="Login.aspx.cs" %>

<%@ Register TagPrefix="mobile" Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
    <mobile:StyleSheet Runat="server" ReferencePath="externalReferencePath">
        <mobile:Style Name="txt" Font-Size="Small" />
    </mobile:StyleSheet>
    <mobile:Form ID="Form1" Runat="server" StyleReference="txt">
        <mobile:Image Runat="server" ImageUrl="~/images/logo.gif">
        </mobile:Image>
        <br />
        <mobile:Label ID="Label1" Runat="server">用户名/账号：</mobile:Label>
        <mobile:TextBox ID="txtUserName" Runat="server">
        </mobile:TextBox>
        <mobile:Label ID="Label2" Runat="server">密码：</mobile:Label>
        <mobile:TextBox ID="txtUserPwd" Runat="server" Password="True">
        </mobile:TextBox>
        <mobile:Command ID="cmdLogin" Runat="server" OnClick="cmdLogin_Click">登录</mobile:Command>
        <mobile:Label ID="lbMsg" Runat="server">
        </mobile:Label>
        <mobile:Label ID="lbTime" Runat="server">
        </mobile:Label>
    </mobile:Form>
</body>
</html>

Login.aspx.cs
using System;

namespace W.Web
{
    public partial class Login : System.Web.UI.MobileControls.MobilePage
    {
        protected string BackUrl = "~/Default.aspx";
        protected Sr_Members.Ws_MembersSoapClient user = new W.Web.Sr_Members.Ws_MembersSoapClient();

        protected void Page_Load(object sender, EventArgs e)
        {
            if (Request.Params["backurl"] != null)
            {
                BackUrl = Request.Params["backurl"];
                int i = BackUrl.IndexOf('?');
                if (i != -1)
                {
                    BackUrl = BackUrl.Substring(0, i);
                }
            }

            if (Session["UserName"] != null)
            {
                Response.Redirect(BackUrl);
            }

            lbTime.Text = DateTime.Now.ToString("[MM-dd HH:mm]");
        }

        protected void cmdLogin_Click(object sender, EventArgs e)
        {
            string username = txtUserName.Text;
            string userpwd = txtUserPwd.Text;
            lbMsg.Text = "123:" + username;

            //if (string.IsNullOrEmpty(username))
            //{
            //    lbMsg.Text = "请输入用户名！";
            //    return;
            //}

            //if (string.IsNullOrEmpty(userpwd))
            //{
            //    lbMsg.Text = "请输入密码";
            //    return;
            //}

            //if (user.Mem_Login(username, W.Common.MD5.Encrypt(userpwd)))
            //{
            //    Session["UserName"] = username;
            //    Response.Redirect(BackUrl);
            //}
            //else
            //{
            //    lbMsg.Text = "用户名或密码错误！";
            //}
        }
    }
} --------------------编程问答-------------------- 我用windows mobile 6.1系统机来测试的。

补充：.NET技术 ,  ASP.NET

.net 移动web开发 按钮点击后后台事件里无法取到表单的值，始终为空。

.net 移动web开发按钮点击后后台事件里无法取到表单的值，始终为空。