在aspx.cs页面的intelliSense中找不到命名空间

Question

你好，我在Connection.cs类中创建了以下命名空间。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Configuration;
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;
namespace conn
{
public class Connection
{
public SqlConnection con;
public SqlCommand cmd;
//public SqlDataAdapter adt;
string StrError;
public Connection()
{
try
{
con = new SqlConnection(ConfigurationManager.ConnectionStrings["PortfolioMgt"].ConnectionString);
}
catch (SqlException sqlEx)
{
StrError = sqlEx.Message;
}
catch (Exception ex)
{
StrError = ex.Message;
}
}
public void Open_Connection()
{
try
{
con.Open();
}
catch (SqlException sqlEx)
{
StrError = sqlEx.Message;
}
catch (Exception ex)
{
StrError = ex.Message;
}
}
public void Close_Connection()
{
try
{
con.Close();
}
catch (SqlException sqlEx)
{
StrError = sqlEx.Message;
}
catch (Exception ex)
{
StrError = ex.Message;
}
}
}
}

我想在Login.aspx.cs页面上使用一个自定义的名称空间（conn）。登录页面的代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using conn;
public partial class Login : System.Web.UI.Page
{
    Connection con = new Connection();
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void btnLogin_Click(object sender, EventArgs e)
    {
        int investorId;
        investorId=con.select_Inv_Login(txtUserName.Text, txtPassword.Text);
        if(investorId!=0)
        {
            Session["inv_id"] = investorId;
            Response.Redirect("~/MyProfile.aspx");
        }
        else
        {
            lblMsg.Visible = true;
            lblMsg.Text = "User Name or Password incorrect";
        }
    }
}

有一次我试着写"使用conn；"它给了我以下错误：找不到类型或命名空间名称"conn"（是否缺少using指令或程序集引用？）

Answer 1

尝试using yourProjName.App_Code.conn

Answer 2

Yippey！！！问题解决了。类生成操作未设置为编译类型。它是内容类型，所以它给出了错误。