WCF(二) 使用配置文件实现WCF应用程序

服务三要素ABC
A:Address 在哪里（包含传输方式的信息）
B:Binding 怎么实现（与地址的传输方式要匹配）
C:Contract做什么（服务契约）

namespace WCFServiceDemo
{
    [ServiceContract]
  public  interface IHelloService
    {
        [OperationContract]
        DateTime GetDateTime();

        [OperationContract]
        DataTable GetUserInfo();
    }
}

继承接口

 class HelloService:IHelloService
    {
       public DateTime GetDateTime()
       {
            return DateTime.Now;
       }
 
        public DataTable GetUserInfo()
        {
            string connstring = @"Data Source=WIN7U-20130122R\SQLEXPRESS;Initial Catalog=TCEKT;Persist Security Info=True;User ID=sa";
            SqlConnection conn = new SqlConnection(connstring);
            SqlDataAdapter sda=new SqlDataAdapter("select * from User",conn);
            DataTable dt = new DataTable();
            sda.Fill(dt);
            return dt;
        }
    }

Winfom调用

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        ServiceHost host = null;
        private void button1_Click(object sender, EventArgs e)
        {
            host = new ServiceHost(typeof(WinformHello.HelloService));
            host.Open();
            label1.Text = "服务已启动！";
        }
    }

配置文件App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
    <!--WCF-->
    <system.serviceModel>
        <services>
            <service name="WinformHello.HelloService" behaviorConfiguration="testBehavior"><!--name:指实现服务契约的类-->
                <host>
                    <baseAddresses>
                        <add baseAddress="http://localhost:8001/Hello"/>
                    </baseAddresses>
                </host>
                <endpoint address="" binding="basicHttpBinding" contract="WCFServiceDemo.IHelloService">
                </endpoint> 
            </service> 
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="testBehavior">
                    <serviceMetadata httpGetEnabled="true"/><!--允许访问wcf服务-->
                </behavior>
            </serviceBehaviors>
        </behaviors>
    </system.serviceModel>
</configuration>