ASP.NET网站无法在App_Code文件夹中看到.cs文件

Question

ASP.NET网站无法在App_Code文件夹中看到.cs文件

所以我有一个ASP.NET网站(不是Web应用程序),我在VS2010中用C#制作.它在我的机器上运行正常,但是当我将它上传到它托管的站点时,它将无法编译,给出:"CS0246:找不到类型或命名空间名称'DataAccess'(你是否缺少using指令或装配参考？)"

我一直在使用VS中的复制网站功能,并且在我想将自己的类放在App_Code文件夹中并使用它之前没有任何问题.我在其他答案中读到了将.cs属性更改为"编译"而不是"内容",但在文件属性中没有这样的选项...只有文件名,完整路径和自定义工具.这是.cs文件中的代码:

using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.Configuration;

/// <summary>
/// Provides access to SQL Server database. 
/// </summary>
/// 
public class DataAccess
{
    //Variables & public properties ***********************************
    private string connectionString = "";
    private int recordCount = -1;

    /// <summary>
    /// Property: gets count of records retrieved or changed 
    /// </summary>
    public int Count
    {
        get
        {
            return recordCount;
        }
    }

    //Class constructor is executed when object is initialized ***********
    /// <summary>
    /// Connection string name in web.config file is required to initialize DataAccess
    /// </summary>
    /// <param name="ConnectionName">Name of web.config connection string</param>
    public DataAccess(string ConnectionName)
    {
        if (WebConfigurationManager.ConnectionStrings[ConnectionName] == null) {
            throw new Exception("Cannot find connection string named '" +
               ConnectionName + "' in web.config");
        }
        //Get connection string from web.config.
        connectionString = WebConfigurationManager.ConnectionStrings[ConnectionName].ConnectionString;
    }
    /// <summary>
    /// Executes SELECT statement and returns results in dataTable
    /// </summary>
    /// <param name="SQL">Select SQL statement</param>
    /// <returns></returns>
    public DataTable FillDataTable(string SQL)
    {
        SqlConnection _objConn = new SqlConnection(connectionString);
        SqlDataAdapter objAdapter = new SqlDataAdapter(SQL, _objConn);
        DataTable dt = new DataTable();
        try {
            objAdapter.Fill(dt);
        }
        catch (SqlException ex) {
            throw new Exception("Error in SQL:" + SQL, ex);
        }
        catch (Exception ex) {
            throw ex; //Bubbling exception up to parent class
        }
        finally {
            _objConn.Close();
        }

        recordCount = dt.Rows.Count;
        return dt;
    }

    /// <summary>
    /// Executes "non-query" SQL statements (insert, update, delete)
    /// </summary>
    /// <param name="SQL">insert, update or delete</param>
    /// <returns>Number of records affected</returns>
    public int ExecuteNonQuery(string SQL)
    {
        SqlConnection _objConn = new SqlConnection(connectionString);
        try {
            _objConn.Open();
            SqlCommand objCmd = new SqlCommand(SQL, _objConn);
            recordCount = objCmd.ExecuteNonQuery();
        }
        catch (SqlException ex) {
            throw new Exception("Error in SQL:" + SQL, ex);
        }
        catch (Exception ex) {
            throw new Exception(ex.Message); //Rethrowing exception up to parent class
        }
        finally { _objConn.Close(); }

        return recordCount;
    }

    public int ExecuteScalar(String SQL)
    {
        SqlConnection _objConn = new SqlConnection(connectionString);
        int intID;
        try {
            _objConn.Open();
            SqlCommand objCmd = new SqlCommand(SQL, _objConn);
            intID = Convert.ToInt32(objCmd.ExecuteScalar());
        }
        catch (SqlException ex) {
            throw new Exception("Error in SQL:" + SQL, ex);
        }
        catch (Exception ex) {
            throw new Exception(ex.Message); //Rethrowing exception up to parent class
        }
        finally { _objConn.Close(); }
        return intID;
    }

}//end class

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从我的页面:

<%@ Page Language="C#" %>

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

<script runat="server">

 protected void Page_Load(object sender, EventArgs e)
 {
  //Initialize dataAccess class
  DataAccess myDA = new DataAccess("A05Customers");

  //Populate dataTable and bind to GridView Control
  string strSQL = "Select * from tblCustomers";

  gvCustomers.DataSource = myDA.FillDataTable(strSQL);
  gvCustomers.DataBind();
 }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>GridView</title>
</head>
<body>
    <form id="form1" runat="server">
    <div align="center" style="font-family: Verdana">
  <h2>GridView</h2>
  <hr style="color: #0000FF" width="800" />
  <br />
  <asp:GridView ID="gvCustomers" runat="server" BackColor="#FFFFCC" BorderColor="#336699" BorderStyle="Inset" BorderWidth="5px" CellPadding="2" CellSpacing="4" />
  <br />
 </div>
    </form>
</body>
</html>

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谢谢你的帮助!

Answer 1

Jus*_*tin 20

默认情况下,网站不会编译.cs文件.你需要做一些不同的事情.

将每个类文件设置为该类文件的属性中的"编译".您可以通过单击类文件,在属性资源管理器窗口中查看属性以及将"构建操作"下拉列表更改为"编译"来查看此选项.
如果上述方法无效,请从app_code中删除该类并将其放在根文件夹中.

我发现你需要将App_Code文件夹中的所有内容更改为Build Action> Compile,然后执行Clean Solution,然后删除obj文件夹的所有文件,然后执行Build Action> None(这是可选的).如果App_Data文件夹中有*.cs文件,并且编译失败,我发现旧的Cache引用在"obj"中. (2认同)

Answer 2

Mat*_*tej 5

你有app_code文件夹它是Web应用程序的根文件夹(不仅是文件夹或虚拟文件夹).看来Asp.NET无法看到app_code文件夹.

Conent和编译选项仅在WebApplication项目中可用.

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