using System;?????????????????????????????????? //引用System名称空间下的类
using System.Web;?????????????????????????????? //引用Web名称空间下的类
using System.Web.Services;????????????????????? //引用Services名称空间下的类
using System.Web.Services.Protocols;??????????? //引用Protocols名称空间下的类
using System.Data.SqlClient;??????????????????? //引用SqlClient名称空间下的类
using System.Collections;?????????????????????? //引用Collections名称空间下的类
using System.Data;????????????????????????????? //引用Data名称空间下的类
[WebService(Namespace = "http://tempuri.org/")]//默认的名称空间
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
??? public Service ()?????????????????????????? //默认构造函数
??? {
??? }
??? public class Employee?????????????????????? //自定义类,用以存储数据
??? {
??????? public string employeeId;
??????? public string firstName;
??????? public string lastName;
??? }
???? [WebMethod]
???? [System.Xml.Serialization.XmlInclude(typeof(Employee))]??? //声明“Employee”类可写入XML
??? public ArrayList GetData()????????????????????? //获得数据库数据
??? {
??????? SqlConnection conn = new SqlConnection(); //定义“SqlConnnection”类实例
??????? //数据库连接字符串
??????? conn.ConnectionString = "Data Source=.;Initial Catalog=Company; Persist Security Info=True;User ID=sa;Password=sa";
??????? //定义“SqlCommand”实例,从“Employee”表中取数据
??????? SqlCommand command = new SqlCommand( "select * from Employee",conn);
??????? conn.Open();??????????????????????????????? //打开连接
??????? SqlDataAdapter da = new SqlDataAdapter();?? //定义“SqlDataAdapter”类实例
??????? //将“command”值传递给“SqlDataAdapter”的“SelectCommand”属性
??????? da.SelectCommand = command;
??????? DataSet ds = new DataSet();???????????????? //定义“DataSet”类实例
??????? da.Fill(ds,"tables");????????????????????? //取数据
??????? ArrayList al = new ArrayList();???????????? //定义“ArrayList”类实例
??????? for (int i = 0; i < ds.Tables[0].Rows.Count; i++)?? //将全部数据存储于al变量中
??????? {
??????????? Employee em = new Employee();?????????????? //定义“Employee”类实例
??????????? //添加数据到“al”变量中
????????????? em.employeeId= ds.Tables[0].Rows[i]["employeeId"].ToString().Trim();
????????????? em.firstName = ds.Tables[0].Rows[i]["firstName"].ToString().Trim();
????????????? em.lastName=ds.Tables[0].Rows[i]["lastName"].ToString().Trim();
??????????? al.Add(em);
??????? }
??????? conn.Close();?????????????????????????????????? //关闭数据库
??????? return al;
??? }
}
(18)?????? 引用名称空间、类声明、默认构造函数等代码都是VS 2005自动生成的。
(19)?????? “[WebService(Namespace = "http://tempuri.org/")]”表示WebService的名称空间。
(20)?????? [WebMethod]关键字指明此函数为WebService的方法。
(21)?????? DataSet类型是一种多表数据类型。若数据以此类型返回,Flex程序将很难处理。所以本程序中自定义了Employee类,将数据全部存储于ArrayList类型变量中。
(22)?????? 由于Employee类是自定义的,WebService在生成WSDL(WebService标准文件)时并不认识,所以需要声明。声明语句为“[System.Xml.Serialization.XmlInclude (typeof(Employee))]”。
(23)?????? 数据库连接语句“Data Source=.;Initial Catalog=Company;Persist Security Info=True; User ID=sa;Password=sa”必须正确。用户可根据实际设置修改用户名和密码。
(24)?????? 获取Employee表全部数据的SQL语句为“select * from Employee”。
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本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/spyking945/archive/2009/07/07/4325303.aspx