Aspx page doesn't compile when page is copied from another project_问答_开发者

Aspx page doesn't compile when page is copied from another project

开发者 https://www.devze.com 2022-12-21 01:37 出处：网络

相关专题：asp.net

I often have an issue with compile errors when I copy over an aspx page and code behind file from another project, it seems to work when I create another page and the content manually but if I just copy the files it won't. I have checked to make sure namespaces and references are ok but still doesn't make any sense. The error I get is:

Error The name 'txtUser' does not exist in the current context

I just wanted to understand why.

For e.g. I copied over the following:

ASPX
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="Login" %>

<!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 runat="server">
    <title>Login</title>
</head>
<body>
    <form id="form1" runat="server">
  开发者_如何学Go  <table align="center" width="300px" style="margin-top: 200px;">
        <tr>
            <td>
                    <legend>Login</legend>
                    <table style="width: 30%;" align="center">
                        <tr>
                            <td>
                                <asp:TextBox ID="txtUser" runat="server"></asp:TextBox>
                            </td>
                        </tr>
                        <tr>
                            <td>
                                &nbsp;
                            </td>
                        </tr>
                    </table>
            </td>
        </tr>
    </table>
    </form>
</body>
</html>

ASPX.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Security;

public partial class Login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        txtUser.Text = "text";
    }
}

This is probably because the designer file is missing for the page. If it is, you can create it manually by right-clicking the page in the solution explorer and selecting 'Convert to Web Application'.

Are you copying the login.aspx.designer.cs. This file contains a partial class that holds the definition of the controls on the .aspx page.

e.g. for txtUser you'd have the declaration in the .designer.cs file.

One thing to check is if your new project has the same Project References as the old one.

If something is missing there (or indeed in your web.config references), VS can skip generating the designer.cs file altogether, resulting in the error you mention.

As far I look to u r posted questions and the code u copy :

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="Login" %>

You get this error because in u r designer page there is no textbox control so it throws this error : "Error The name 'txtUser' does not exist in the current context"

For more help can you paste the exact code u r coping.