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动态对象DynamicObject实现让字典书写更优美

我想用过MVC的人都知道一件事， viewbag 的值是存储在 viewdata 里面的。

先看以下组图：

看了上图是不是感觉很神奇， Dictionary<string, object> 也可以这样使用~

实现主要继承了 DynamicObject

接下来直接贴代码：

/// <summary> /// 动态对象 /// </summary> public class VarObject : DynamicObject {  /// <summary>  /// 数据字段  /// </summary>  private Dictionary<string, object> ViewData = new Dictionary<string, object>();  /// <summary>  /// 调用 varo(); 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="args"></param>  /// <param name="result"></param>  /// <returns></returns>  public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)  {   return base.TryInvoke(binder, args, out result);  }  /// <summary>  /// 调用 varo.Method(); 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="args"></param>  /// <param name="result"></param>  /// <returns></returns>  public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)  {   return base.TryInvokeMember(binder, args, out result);  }  /// <summary>  /// 调用 varo + varo; 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="arg"></param>  /// <param name="result"></param>  /// <returns></returns>  public override bool TryBinaryOperation(BinaryOperationBinder binder, object arg, out object result)  {   return base.TryBinaryOperation(binder, arg, out result);  }  /// <summary>  /// 调用 varo++; 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="result"></param>  /// <returns></returns>  public override bool TryUnaryOperation(UnaryOperationBinder binder, out object result)  {   return base.TryUnaryOperation(binder, out result);  }  /// <summary>  /// 调用 varo["key"]; 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="indexes"></param>  /// <param name="result"></param>  /// <returns></returns>  public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)  {   if (indexes == null || indexes.Length != 1)   {    throw new ArgumentException("indexes");   }   result = null;   string key = indexes[0] as string;   if (key != null)   {    result = ViewData[key];   }   else   {    throw new ArgumentException("indexes");   }   return true;  }  /// <summary>  /// 调用 varo["key"] = "value"; 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="indexes"></param>  /// <param name="value"></param>  /// <returns></returns>  public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)  {   if (indexes == null || indexes.Length != 1)   {    throw new ArgumentException("indexes");   }   string key = indexes[0] as string;   if (key != null)   {    ViewData[key] = value;    return true;   }   else   {    throw new ArgumentException("indexes");   }  }  /// <summary>  /// 获取所有key  /// </summary>  /// <returns></returns>  public override IEnumerable<string> GetDynamicMemberNames()  {   return ViewData.Keys;  }  /// <summary>  /// 调用 varo.key; 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="result"></param>  /// <returns></returns>  public override bool TryGetMember(GetMemberBinder binder, out object result)  {   result = ViewData[binder.Name];   return true;  }  /// <summary>  /// 调用 varo.key = "value"; 时执行  /// dynamic varo = new VarObject();  /// </summary>  /// <param name="binder"></param>  /// <param name="value"></param>  /// <returns></returns>  public override bool TrySetMember(SetMemberBinder binder, object value)  {   ViewData[binder.Name] = value;   return true;  } }

运行代码：

class Program {     static void Main(string[] args)     {  dynamic varo = new VarObject();  varo.a = "value";  varo.b = "2";  varo["c"] = 3;  var d = varo++;  var e = varo + varo;  varo();   varo.Method();   foreach(var v in varo.GetDynamicMemberNames())  {      Console.WriteLine(v);   }  Console.WriteLine("done.");   Console.ReadKey();     } }