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2011-08-21T02:20:06.333
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From what I can tell, generic parameters never get passed to the <code>TryGetMember()</code> or <code>TryInvokeMember</code> overrides. The MSDN documentation only shows simple string names getting passed in by the <code>GetMemberBinder</code> and <code><a href="http://msdn.microsoft.com/en-us/library/system.dynamic.invokememberbinder.aspx" rel="nofollow">GetInvokeBinder</a></code> objects. The most simple implementation is to actually implement <code>GetValues<T>()</code> on the <code>DynamicJSON</code> class. <pre><code>public List<T> GetValues<T>() { Console.WriteLine("Called with generic parameter {0}", typeof(T)); return new List<T>(); } </code></pre> When I ran this simple test, the generic parameter was a .NET <code>Int32</code> type: <pre><code>dynamic json = new DynamicJSON(); json.GetValues<int>() </code></pre> If implementing the <code>GetValues<T>()</code> method is not feasible for you, you can implement <code>TryInvokeMember()</code> to return a method that has <code><a href="http://msdn.microsoft.com/en-us/library/system.dynamic.dynamicobject.tryconvert.aspx" rel="nofollow">TryConvert()</a></code> implemented. When .NET tries to convert the result of <code>GetValues<int>()</code> into a <code>List<int>()</code>, your overridden <code>TryConvert()</code> method will get called with <code>List<int>()</code> as the "convert binder type". <pre><code>public class DynamicJSON : DynamicObject { public override bool TryInvokeMember(InvokeMemberBinder binder, Object[] args, out Object result) { if (binder.Name == "GetValues") { result = new DynamicValues(); return true; } else { result = null; return false; } } private class DynamicValues : DynamicObject { public override bool TryConvert(ConvertBinder binder, out Object result) { Console.WriteLine("Converting dynamic values to {0}", binder.Type); if (binder.Type == typeof(List<int>)) { result = new List<int>(); return true; } else { result = null; return false; } } } } public class Test { public static void Main(string[] args) { dynamic json = new DynamicJSON(); List<int> values = json.GetValues(); Console.WriteLine(values.GetType()); } } </code></pre>
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1. POSpecifying generic type when accessing a c# dynamic object
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