找不到类型或命名空间名称,是不是版本问题（某些代码限制了）

[changeking]

我备份了下面这两个文件，然后回到家新建了一个项目，再把这两个文件复制或者添加进去，为什么就运行不了呢？？出现找不到类型或命名空间名称“Books”
Service1.asmx.cs

using System;
using System.Data;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.ComponentModel;
using System.Collections.Generic;
using System.Text;
using MySql.Data.MySqlClient;
namespace WebSite6
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://www.baidu.com")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
    public class Service1 : System.Web.Services.WebService
    {
        static MySqlConnection getConnection()
        {
            //this static method will return a connection constructed by connection string
            string myConnectionString = "Database=jw303;Data Source=achilles.mcscw3.le.ac.uk ;User Id=jw303;Password=ousetypt"; MySqlConnection connection = new MySqlConnection(myConnectionString);
            return connection;
        }

        static void Main(string[] args)
        {
            Service1 app = new Service1();
            Console.WriteLine(app.getBooksByTitle("Ajax_on_Java"));
            Console.ReadLine();
        }

        [WebMethod]
        public Books getBooksByTitle(string title)
        {

            Books b = null;
            try
            {
                MySqlConnection connection = getConnection();
                connection.Open();
                MySqlCommand mycm = new MySqlCommand("", connection);
                mycm.Prepare();
                mycm.CommandText = String.Format("select Title,Copy,On_Loan from Copy_of_Books where Title=?Title_para");
                mycm.Parameters.AddWithValue("?Title_para", title);
                MySqlDataReader msdr = mycm.ExecuteReader();
                while (msdr.Read())
                {
                    if (msdr.HasRows)
                    {
                        b = new Books();
                        b.Title = msdr.GetString("title");
                        b.Copy = msdr.GetString("copy");
                        b.On_Loan = msdr.GetString("on_loan");
                    }
                }
                msdr.Close();
                connection.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            return b;
        }
        [WebMethod]
        public Books getBooksByAuthor(string author)
        {
            Books b = null;
            try
            {
                MySqlConnection connection = getConnection();
                connection.Open();
                MySqlCommand mycm = new MySqlCommand("", connection);
                mycm.Prepare();
                mycm.CommandText = String.Format("select AuthorName,Title,Copy,On_Loan from Author, Copy_of_Books where  Author.AuthorID=Copy_of_Books.Auth and AuthorName=?Auth_para");
                mycm.Parameters.AddWithValue("?Auth_para", author);
                MySqlDataReader msdr = mycm.ExecuteReader();
                while (msdr.Read())
                {
                    if (msdr.HasRows)
                    {
                        b = new Books();
                        b.Title = msdr.GetString("author");
                        b.Title = msdr.GetString("title");
                        b.Copy = msdr.GetString("copy");
                        b.On_Loan = msdr.GetString("on_loan");
                    }
                }
                msdr.Close();
                connection.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            return b;
        }
    }
}

下面是Books.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.Collections.Generic;
using System.Text;

namespace WebSite6
{
    public class Books
    {
        private string bookno; //2

        public string BookNo
        {
            get { return bookno; }
            set { bookno = value; }
        }
        private string title; //2

        public string Title
        {
            get { return title; }
            set { title = value; }
        }
        private string copy; //3

        public string Copy
        {
            get { return copy; }
            set { copy = value; }
        }
        private string on_loan; //4

        public string On_Loan
        {
            get { return on_loan; }
            set { on_loan = value; }
        }
        private double author; //5

        public double AuthorName
        {
            get { return author; }
            set { author = value; }
        }
        public override string ToString()
        {
            return "The Book is :" + this.bookno + "\tName:" + this.title + "\t" + this.copy + "\n\tOn_Loan:" + this.on_loan + "\t AuthorName:" + this.author;
        }
    }
}

[changeking]

两个文件都保存在同一个namespace下为什么还是不行啊？？高手来帮帮忙

[acqy]

我估计你的Books和Service1两个类被创建在了两个不同的项目中。如果是这样的话，你需要在Service1所在的项目上添加对Books项目的引用。

[lzsh0622]

添加你的WebServices引用

[changeking]

[Quote=引用 2 楼 acqy 的回复:]
我估计你的Books和Service1两个类被创建在了两个不同的项目中。如果是这样的话，你需要在Service1所在的项目上添加对Books项目的引用。
[/Quote]
请教一下怎样添加对Books项目的引用啊?

[wartim]

添加引用->项目->选择book.cs的那个项目

webservice的命名空间写成百度。。。真强大

[cuike519]

编译了么？

[changeking]

[Quote=引用 5 楼 wartim 的回复:]
添加引用->项目->选择book.cs的那个项目

webservice的命名空间写成百度。。。真强大
[/Quote]
添加引用->项目->没东西可以选
我点浏览也没办法添加工程..

[acqy]

你两个项目，假设Service1在项目Project1下，而Books在项目Project2下，那么你就在Project1上点右键，选择“添加引用”，然后在弹出的对话框中，选择“项目”（或者“工程”，忘记了）选项卡，之后在列表中选择Project2后确定，就可以了。

你的问题其实很简单，根据楼上的答复，真不知为何需要添加Web引用。