当前上下文中不存在名称

needanothercoder 2012-05-06 11:32:43

出错信息如下，我的aspx文件中明明有txtname等控件，为什么出这样的错误？如何修正？

错误 2 当前上下文中不存在名称“txtname” C:\Users\Administrator\Desktop\Upload_Ima\uploadimages\upr02_1\prjSRI02\prjSRI02\login.aspx.cs 23 30 prjSRI02
错误 3 当前上下文中不存在名称“txtpwd” C:\Users\Administrator\Desktop\Upload_Ima\uploadimages\upr02_1\prjSRI02\prjSRI02\login.aspx.cs 24 38 prjSRI02
错误 4 当前上下文中不存在名称“txtyzm” C:\Users\Administrator\Desktop\Upload_Ima\uploadimages\upr02_1\prjSRI02\prjSRI02\login.aspx.cs 25 30 prjSRI02
login.aspx.cs



using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;



public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {



    }

    protected void btnlogin_Click(object sender, EventArgs e)

    {

        db mydb = new db();

        if (IsValid)

        {

            string strname = txtname.Text.Trim();

            string strpwd = mydb.MD5(txtpwd.Text.Trim());

            string strnum = (txtyzm.Text.Trim()).ToUpper();  //将验证码转为大写



            if (strnum == Session["ValidateNum"].ToString())

            {

                string strsel = "select * from tblSRI where username='" + strname + "' and userpwd='" + strpwd + "'";

                SqlDataReader mydr = mydb.reDr(strsel);

                mydr.Read();



                if (mydr.HasRows)

                {

                    Session["userid"] = mydr["id"];

                    Session["name"] = mydr["username"];

                    Session["userrole"] = mydr["role"];

                    Response.Redirect("~/usermanage.aspx");

                }

                else

                {

                    Response.Write(mydb.msgbox("用户名或密码有误，请重新登录"));

                }



            }

            else

            {

                Response.Write(mydb.msgbox("验证码错误"));

            }



        }

        else

        {

            Response.Write(mydb.msgbox("用户名或密码不能为空"));

        }



    }

    protected void txtreg_Click(object sender, EventArgs e)

    {

        Response.Redirect("~/CreateUser.aspx");

    }

}



<%@ Page Language="C#" AutoEventWireup="true" CodeFile="login.aspx.cs" Inherits="_Default"

    Trace="True" %>



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

    <title>用户登录</title>

    <link href="css.css" rel="stylesheet" type="text/css" />

</head>

<body>

    <p>

         </p>

    <p>

         </p>

    <table width="405" border="0" align="center" cellpadding="0" cellspacing="0" background="images/login.jpg">

        <tr>

            <td height="65">

                 

            </td>

        </tr>

        <tr>

            <td style="height: 200px">

                <form id="form1" runat="server">

                <div>

                    <table width="95%" border="0" align="center" cellpadding="0" cellspacing="0">

                        <tr>

                            <td width="30%" height="30" class="logintext" style="width: 80px">

                                用户名：

                            </td>

                            <td width="41%">

                                 <asp:TextBox CssClass="textboxface" ID="txtname" runat="server"></asp:TextBox>

                            </td>

                            <td width="29%">

                                 <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtname"

                                    ErrorMessage="*"></asp:RequiredFieldValidator>

                            </td>

                        </tr>

                        <tr>

                            <td width="30%" height="30" class="logintext" style="width: 80px">

                                密 码：

                            </td>

                            <td>

                                 <asp:TextBox CssClass="textboxface" ID="txtpwd" runat="server" TextMode="Password"></asp:TextBox>

                            </td>

                            <td>

                                 <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtpwd"

                                    ErrorMessage="*"></asp:RequiredFieldValidator>

                            </td>

                        </tr>

                        <tr>

                            <td width="30%" height="30" class="logintext" style="width: 80px">

                                验证码：

                            </td>

                            <td>

                                 <asp:TextBox CssClass="textboxface" ID="txtyzm" runat="server"></asp:TextBox>

                            </td>

                            <td>

                                 <asp:Image ID="imgvalnum" runat="server" ImageUrl="~/ValidateNum.aspx" />

                                <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="txtyzm"

                                    ErrorMessage="*"></asp:RequiredFieldValidator>

                            </td>

                        </tr>

                        <tr>

                            <td height="30" colspan="3" align="center">

                                 

                                <asp:Button ID="btnlogin" runat="server" Text="登录" OnClick="btnlogin_Click" />

                                <asp:Button ID="txtreg" runat="server" Text="注册" OnClick="txtreg_Click" 

                                    CausesValidation="False" />

                                <asp:LinkButton CssClass="loginlnk" ID="lbtnwjmm" runat="server">忘记密码？</asp:LinkButton>

                            </td>

                        </tr>

                    </table>

                </div>

                </form>

            </td>

        </tr>

    </table>

</body>

</html>