Csharp/CSharp Tutorial/GUI Windows Forms/Binder — различия между версиями

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м (1 версия)
 
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Версия 15:31, 26 мая 2010

extends Binder to create your own binder

using System;
using System.Reflection;
using System.Globalization;
  class MyClass
  {
    DateTime[] dateTimes = new DateTime[10];
    public DateTime this[int index]
    {
      get{ return dateTimes[index]; }
      set{ dateTimes[index] = value;}
    }
    
    
    private DateTime dateOfBirth;
    public DateTime DateOfBirth
    {
        get{ return dateOfBirth; }
        set{ dateOfBirth = value; }
    }
      
    public void Test()
    {
      Console.WriteLine("Test method called");
    }
    
    
    private string field;
    
    public string Property
    { 
      get{ return field; }
      set{ field = value; }
    }
    
  }

    class MainClass{
    
    static void Main(string[] args)
    {
      Type type = typeof(MyClass);
      object o = Activator.CreateInstance(type);
      type.InvokeMember( "DateOfBirth", 
        BindingFlags.Instance | BindingFlags.SetProperty |
        BindingFlags.Public, new DateTimeBinder(), 
        o, new object[]{@"02/12/1966"});
        
      Console.WriteLine(((MyClass)o).DateOfBirth);
    }
    }    
    public class DateTimeBinder : Binder
    {
      public override MethodBase BindToMethod(
        BindingFlags bindingAttr,
        MethodBase[] match,
        ref object[] args,
        ParameterModifier[] modifiers,
        CultureInfo culture,
        string[] names,
        out object state)
      {
        state = null;
        return match.Length == 1 ? match[0] : null;
      }
      
      public override FieldInfo BindToField(
        BindingFlags bindingAttr,
        FieldInfo[] match,
        object value,
        CultureInfo culture)
      {
        return null;
      }
      
      public override MethodBase SelectMethod(
        BindingFlags bindingAttr,
        MethodBase[] match,
        Type[] types,
        ParameterModifier[] modifiers)
      {
        return null;
      }
      
      public override PropertyInfo SelectProperty(BindingFlags bindingAttr,PropertyInfo[] match,Type returnType,Type[] indexes,ParameterModifier[] modifiers){
        return null;
      }
      
      public override object ChangeType(object value,Type type,CultureInfo culture)
      {
        if ( value.GetType() != typeof(string)) return value;
        try
        {
          return Convert.ToDateTime(value);
        }
        catch
        {
          return value;
        }
      }
      public override void ReorderArgumentArray(ref object[] args,object state){}
    }

extends ISupportInitialize

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
   public class Form1 
   {
      static void Main()
      {
         BindingSource bindSource = new BindingSource();
         MyClass dataContainer = new MyClass();
         ISupportInitialize bindSourceInit = bindSource;
         ISupportInitialize dataInit = dataContainer;
         bindSourceInit.BeginInit();
         dataInit.BeginInit();
         dataContainer.StringCollection = new List<string>();
         bindSource.DataSource = dataContainer;
         bindSource.DataMember = "StringCollection";
         bindSourceInit.EndInit();
         dataInit.EndInit();
      }
      
   }
   public class MyClass : ISupportInitialize
   {
      private List<string> m_Data = null;
      private bool m_Initializing = false;
      private List<string> m_TempData = null;
      public List<string> StringCollection
      {
         get
         {
            return m_Data;
         }
         set
         {
            if (m_Initializing)
               m_TempData = value;
            else
               m_Data = value;
         }
      }
      void ISupportInitialize.BeginInit()
      {
         m_Initializing = true;
      }
      void ISupportInitialize.EndInit()
      {
         m_Data = m_TempData;
         m_Initializing = false;
      }
   }