4.0 WCF 之旅 - 简单的计算器程序

      一直以来都想把WCF系统的学习一下，可总是没有坚持下来。再加上平时工作中没有用到WCF去开发项目。所以对WCF的认识基本停留在初级阶段。4.0 马上都要正式发布了，再不学就跟不上潮流了。。

      参考Artech的一些列关于WCF的文章开始我的4.0 WCF 学习之旅，目的不在于成文成书，权当自己的学习笔记。

      开篇上我用WCF做的一个简单的计算器程序吧

步骤一：构建整个解决方案      
    

• BY.WCF.Client  : 一个WinForm应用的客户端
• BY.WCF.Contracts: 一个类库项目，定义服务契约
• BY.WCF.Entities: 一个类库项目，为后扩充项目用
• BY.WCF.Hosting:一个控制台（Console）应用，实现对定义在Services项目中的服务的寄宿
• BY.WCF.Service:一个类库项目，提供对WCF服务的实现。
• Web: 一个webform站点，为后扩充项目用

步骤二：创建服务契约

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;

namespace BY.WCF.Contracts
{
    [ServiceContract(Name="CalculatorService",Namespace="http://www.biyinginfo.cn/")]
    public interface ICalculator
    {
        [OperationContract]
        double Add(double x, double y);
        [OperationContract]
        double Subtract(double x, double y);
        [OperationContract]
        double Multiply(double x, double y);
        [OperationContract]
        double Divide(double x, double y);
    }
}

 

步骤三：创建服务

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using BY.WCF.Contracts;

namespace BY.WCF.Service
{
    public class CalculatorService: ICalculator
    {
        public double Add(double x, double y)
        {
            return x + y;
        }
        public double Subtract(double x, double y)
        {
            return x - y;
        }
        public double Multiply(double x, double y)
        {
            return x * y;
        }
        public double Divide(double x, double y)
        {
            return x / y;
        }
    }
}

 

步骤四：Host CalculatorService

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Description;

namespace BY.WCF.Hosting
{
    class Program
    {
        static void Main(string[] args)
        {
            using (ServiceHost host = new ServiceHost(typeof(BY.WCF.Service.CalculatorService)))
            {
                host.AddServiceEndpoint(typeof(BY.WCF.Contracts.ICalculator), new WSHttpBinding(), "http://localhost:9000/calculatorservice");
                if (host.Description.Behaviors.Find<ServiceMetadataBehavior>() == null)
                {
                    ServiceMetadataBehavior behavior = new ServiceMetadataBehavior();
                    behavior.HttpGetEnabled = true;
                    behavior.HttpGetUrl = new Uri("http://localhost:9000/calculatorservice/metadata");
                    host.Description.Behaviors.Add(behavior);
                }
                host.Opened += delegate { Console.WriteLine("Calculaor Service Start, Press any key to stop the service!"); };
                host.Open();
                Console.Read();
            }
        }
    }
}

 

步骤五：创建客户端:计算器

    WinForm UI

    

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace BY.WCF.Client
{
    public partial class Calculator : Form
    {
        string tmpInputStr = string.Empty;
        string tmpResultStr = string.Empty;
        Operation CurOperation;

        public Calculator()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            tmpInputStr += "1";
            this.textBox1.Text = tmpInputStr;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            tmpInputStr += "2";
            this.textBox1.Text = tmpInputStr;
        }

        private void button3_Click(object sender, EventArgs e)
        {
            tmpInputStr += "3";
            this.textBox1.Text = tmpInputStr;
        }

        private void button4_Click(object sender, EventArgs e)
        {
            tmpInputStr += "4";
            this.textBox1.Text = tmpInputStr;
        }

        private void button5_Click(object sender, EventArgs e)
        {
            tmpInputStr += "5";
            this.textBox1.Text = tmpInputStr;
        }

        private void button6_Click(object sender, EventArgs e)
        {
            tmpInputStr += "6";
            this.textBox1.Text = tmpInputStr;
        }

        private void button7_Click(object sender, EventArgs e)
        {
            tmpInputStr += "7";
            this.textBox1.Text = tmpInputStr;
        }

        private void button8_Click(object sender, EventArgs e)
        {
            tmpInputStr += "8";
            this.textBox1.Text = tmpInputStr;
        }

        private void button9_Click(object sender, EventArgs e)
        {
            tmpInputStr += "9";
            this.textBox1.Text = tmpInputStr;
        }

        private void button10_Click(object sender, EventArgs e)
        {
            tmpInputStr += "0";
            this.textBox1.Text = tmpInputStr;
        }

        private void button11_Click(object sender, EventArgs e)
        {
            using (ServiceReference.CalculatorServiceClient clientProxy = new ServiceReference.CalculatorServiceClient())
            {
                switch (this.CurOperation)
                {
                    case Operation.Add:
                        this.textBox1.Text = clientProxy.Add(double.Parse(this.tmpResultStr), double.Parse(this.tmpInputStr)).ToString();
                        this.tmpResultStr = this.textBox1.Text;
                        this.tmpInputStr = string.Empty;
                        break;
                    case Operation.Subtract:
                        this.textBox1.Text = clientProxy.Subtract(double.Parse(this.tmpResultStr), double.Parse(this.tmpInputStr)).ToString();
                        this.tmpResultStr = this.textBox1.Text;
                        this.tmpInputStr = string.Empty;
                        break;
                    case Operation.Multiply:
                        this.textBox1.Text = clientProxy.Multiply(double.Parse(this.tmpResultStr), double.Parse(this.tmpInputStr)).ToString();
                        this.tmpResultStr = this.textBox1.Text;
                        this.tmpInputStr = string.Empty;
                        break;
                    case Operation.Divide:
                        this.textBox1.Text = clientProxy.Divide(double.Parse(this.tmpResultStr), double.Parse(this.tmpInputStr)).ToString();
                        this.tmpResultStr = this.textBox1.Text;
                        this.tmpInputStr = string.Empty;
                        break;
                }
            }
        }

        private void button12_Click(object sender, EventArgs e)
        {
            this.CurOperation = Operation.Add;
            if (string.IsNullOrEmpty(this.tmpResultStr))
            {
                this.tmpResultStr = this.tmpInputStr;
            }
            this.tmpInputStr = string.Empty;
        }

        private void button13_Click(object sender, EventArgs e)
        {
            this.CurOperation = Operation.Subtract;
            if (string.IsNullOrEmpty(this.tmpResultStr))
            {
                this.tmpResultStr = this.tmpInputStr;
            }
            this.tmpInputStr = string.Empty;
        }

        private void button14_Click(object sender, EventArgs e)
        {
            this.CurOperation = Operation.Multiply;
            if (string.IsNullOrEmpty(this.tmpResultStr))
            {
                this.tmpResultStr = this.tmpInputStr;
            }
            this.tmpInputStr = string.Empty;
        }

        private void button15_Click(object sender, EventArgs e)
        {
            this.CurOperation = Operation.Divide;
            if (string.IsNullOrEmpty(this.tmpResultStr))
            {
                this.tmpResultStr = this.tmpInputStr;
            }
            this.tmpInputStr = string.Empty;
        }

        private void button16_Click(object sender, EventArgs e)
        {
            this.tmpResultStr = string.Empty;
            this.tmpInputStr = string.Empty;
            this.textBox1.Text = string.Empty;
        }

        private void button17_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Text.IndexOf("-") == 0)
            {
                this.textBox1.Text = this.textBox1.Text.Replace("-",string.Empty);
                this.tmpInputStr = tmpInputStr.Replace("-", string.Empty);
            }
            else
            {
                this.textBox1.Text = "-" + this.textBox1.Text;
                this.tmpInputStr = "-" + tmpInputStr;
            }
        }
    }

    enum Operation : int
    {
        Add = 1,
        Subtract = 2,
        Multiply = 3,
        Divide = 4
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace BY.WCF.Client
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Calculator());
        }
    }
}

 

步骤六：运行

    启动服务

   

    启动应用

   

 

下载演示源码：WCFStudySolution.rar