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(); } }