Question

在我的bllLanguage.cs课程中，我无法创建dalLanguage课程的对象，反之亦然。它说无法找到dalLanguage.cs / bllLanguage.cs。以下代码有什么问题？

bllLanguage.cs

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Collections;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using Proj2;


namespace Proj2.BLL.Main.Setting
{
    public class bllLanguage
    {

        public bllLanguage()
        { 
        //add constructor code here
        }

        #region Properties
        /// <summary>
        /// Properties
        /// </summary>
        private int intLanguageID;
        private string strDescription;
        private string strValue;

        #endregion

        public int LanguageID
        {
            get { return intLanguageID; }
            set { intLanguageID = value; }
        }
        public string Description
        {
            get { return strDescription; }
            set { strDescription = value; }
        }
        public string Value
        {
            get { return strValue; }
            set { strValue = value; }
        }

        #region getLanguage
        /// <summary>
        /// getLanguage
        /// </summary>
        /// <returns></returns>
        public DataSet getLanguage()
        {


            dalLanguage objdalLanguage = new dalLanguage(); // ERROR HERE
            DataSet dsgetLanguage = objdalLanguage.getLanguage();
            return dsgetLanguage;

        }
        #endregion




    }
}

dalLanguage.cs

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Data.SqlClient;
using System.Web;
using Microsoft.ApplicationBlocks.Data;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using Proj2;

namespace Proj2.DAL.Main.Setting
{
   public class dalLanguage
    {
        public dalLanguage()
        { 
        //constructor code here
        }


        #region getLanguage
        /// <summary>
        /// getLanguage
        /// </summary>
        /// <returns></returns>
        public DataSet getLanguage()
        {
            DataSet dsgetLanguage = new DataSet();
            try
            {

                dsgetLanguage = SqlHelper.ExecuteDataset(Constants.ConnectionString, CommandType.StoredProcedure, "[Main].[sp_getLanguage]");
            }

            catch (Exception ex)
            {
                throw ex;
            }
            return dsgetLanguage;
        }
        #endregion



    }
}

Answer 1

命名空间不匹配

Proj2.BLL.Main.Setting
Proj2.DAL.Main.Setting

您需要指定完全限定名称或导入名称空间。仅导入Proj2是不够的

Answer 2

我注意到的第一件事是你在bllLanguage.cs中缺少使用语句。添加

using Proj2.DAL.Main.Setting;

bllLanguage.cs中的

Answer 3

首先从不写

catch (Exception ex)
{
    throw ex;
}

Throw ex会覆盖堆栈跟踪！

如果要重新抛出异常，请写入throw。

问题是他们在同一个项目中，如果没有，他们会引用另一个项目吗？

创建对象时出现问题，无法找到类

3 个答案: