MVP模式

MVC模式主要解决的问题就是将表示层和业务层进行分离，在以往做WINFORM项目的时候，通常都是将很多的逻辑代码直接写在了Form.cs代码的事件里，这样的话业务逻辑就和界面紧耦合在一起了，现在我们采用MVC来解耦。

首先建立Model:

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.ComponentModel;

namespaceWindowsFormsApplication10
{
publicclassPerson:INotifyPropertyChanged
{
privatestring_id;
publicstringID
{
get{return_id;}
set{_id=value;OnPropertyChanged("ID");}
}
privatestring_name;

publicstringName
{
get{return_name;}
set{_name=value;OnPropertyChanged("Name");}
}

#regionINotifyPropertyChanged成员

publiceventPropertyChangedEventHandlerPropertyChanged;

protectedvoidOnPropertyChanged(stringPropertyName)
{
PropertyChangedEventHandlerhandler=PropertyChanged;
if(handler!=null)
{
handler(this,newPropertyChangedEventArgs(PropertyName));
}
}
#endregion
}

}

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

namespace WindowsFormsApplication10
{
    public class Person : INotifyPropertyChanged
    {
        private string _id;
        public string ID
        {
            get { return _id; }
            set { _id = value; OnPropertyChanged("ID"); }
        }
        private string _name;

        public string Name
        {
            get { return _name; }
            set { _name = value; OnPropertyChanged("Name"); }
        }

        #region INotifyPropertyChanged 成员

        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string PropertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(PropertyName));
            }
        }
        #endregion
    }

}

为了能支持双向绑定数据，Model实现了INotifyPropertyChanged接口.

再看看Controllor的实现：

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;

namespaceWindowsFormsApplication10
{
publicclassPersonControllor
{
publicPersonFormView;

publicPersonModel;

publicPersonControllor(PersonFormview)
{
//初始化了一个Model
Model=newPerson(){ID="1",Name="xiaojun"};
//通过构造函数将View注入到Controllor中
this.View=view;

//建立起View和Controllor的关联
//这时候View中能使用它所对应的Controllor进行业务逻辑的操作,Model也能和VIEWUI控件进行双向绑定
this.View.Controllor=this;

}


///<summary>
///执行一个业务逻辑
///</summary>
publicvoidUpdatePerson()
{
UpdateToDataBase(Model);
}

privatevoidUpdateToDataBase(Personp)
{
//dosomething
//执行将数据插入到数据库的操作
System.Windows.Forms.MessageBox.Show("ID:"+p.ID+"Name:"+p.Name);
}


}
}

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

namespace WindowsFormsApplication10
{
    public class PersonControllor
    {
        public PersonForm View;

        public Person Model;

        public PersonControllor(PersonForm view)
        {
            //初始化了一个Model
            Model = new Person() { ID = "1", Name = "xiaojun" };
            //通过构造函数将View注入到Controllor中
            this.View = view;

            //建立起View 和Controllor的关联
            //这时候View中能使用它所对应的Controllor进行业务逻辑的操作,Model也能和VIEW UI控件进行双向绑定
            this.View.Controllor = this;
            
        }


        /// <summary>
        /// 执行一个业务逻辑
        /// </summary>
        public void UpdatePerson()
        {
            UpdateToDataBase(Model);
        }

        private void UpdateToDataBase(Person p)
        {
            //do some thing
            //执行将数据插入到数据库的操作
            System.Windows.Forms.MessageBox.Show("ID:" + p.ID + " Name:" + p.Name);
        }


    }
}

然后是View的实现：

usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Data;
usingSystem.Drawing;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Windows.Forms;

namespaceWindowsFormsApplication10
{
publicpartialclassPersonForm:Form
{
privatePersonControllor_controllor;

publicPersonControllorControllor
{
get{return_controllor;}
set
{
this._controllor=value;
//绑定一定只能写在给Controllor赋值以后而不能写在PersonForm的构造函数中(此时Controllor还未被实例化)
//因为我们这里采用的是Controllor-First而不是View-First，不然Controllor.Model为null会异常
//将View通过构造函数注入到Controllor中的属于Controllor-First,这时候Controllor先创建
//将Controllor通过构造函数注入到View中的属于View-First,这时候View先创建
this.textBox1.DataBindings.Add("Text",Controllor.Model,"ID");
this.textBox2.DataBindings.Add("Text",Controllor.Model,"Name");
}
}





publicPersonForm()
{
InitializeComponent();


}

privatevoidbutton1_Click(objectsender,EventArgse)
{
//改变VIEW的UI控件的值，Controllor的Model会跟着变
this.textBox1.Text="2";
this.textBox2.Text="jacky";
Controllor.UpdatePerson();
}

privatevoidbutton2_Click(objectsender,EventArgse)
{
//改变Controllor的Model的值，VIEW的UI控件的值会跟着变
Controllor.Model.ID="2";
Controllor.Model.Name="jacky";

Controllor.UpdatePerson();
}

privatevoidPersonForm_Load(objectsender,EventArgse)
{

}
}
}

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 WindowsFormsApplication10
{
    public partial class PersonForm : Form
    {
        private PersonControllor _controllor;

        public PersonControllor Controllor
        {
            get { return _controllor; }
            set
            {
                this._controllor = value;
                //绑定一定只能写在给Controllor赋值以后而不能写在PersonForm的构造函数中(此时Controllor还未被实例化)
                //因为我们这里采用的是Controllor-First而不是View-First，不然Controllor.Model为null会异常
                //将View通过构造函数注入到Controllor中的属于Controllor-First,这时候Controllor先创建
                //将Controllor通过构造函数注入到View中的属于View-First,这时候View先创建
                this.textBox1.DataBindings.Add("Text", Controllor.Model, "ID");
                this.textBox2.DataBindings.Add("Text", Controllor.Model, "Name");
            }
        }





        public PersonForm()
        {
            InitializeComponent();


        }

        private void button1_Click(object sender, EventArgs e)
        {
            //改变VIEW的UI控件的值，Controllor的Model会跟着变
            this.textBox1.Text = "2";
            this.textBox2.Text = "jacky";
            Controllor.UpdatePerson();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //改变Controllor的Model的值，VIEW的UI控件的值会跟着变
            Controllor.Model.ID = "2";
            Controllor.Model.Name = "jacky";
            
            Controllor.UpdatePerson();
        }

        private void PersonForm_Load(object sender, EventArgs e)
        {

        }
    }
}

最后是程序启动：

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Windows.Forms;

namespaceWindowsFormsApplication10
{
staticclassProgram
{
///<summary>
///应用程序的主入口点。
///</summary>
[STAThread]
staticvoidMain()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
//Controllor-First模式,先创建Controllor(PersonControllor)再将View(PersonForm)注入到Controllor(PersonControllor)中
PersonControllorcontrollor=newPersonControllor(newPersonForm());
Application.Run(controllor.View);
}
}
}