Comments on: Getting stuck in the weeds http://lostechies.com/jimmybogard/2009/08/17/getting-stuck-in-the-weeds/ Strong opinions, weakly held Sat, 25 May 2013 16:53:00 +0000 hourly 1 http://wordpress.org/?v=3.4.2 By: Eric Todd http://lostechies.com/jimmybogard/2009/08/17/getting-stuck-in-the-weeds/#comment-1821 Eric Todd Wed, 26 Aug 2009 04:11:10 +0000 /blogs/jimmy_bogard/archive/2009/08/16/getting-stuck-in-the-weeds.aspx#comment-1821 No samples seem to demonstrate using DynamicMethod with value types. I think this should solve your problem. I've tried to extract this snippet from my codebase in the simplest way possible. I do a lot of dynamic reflection and ran into this problem a while back. var dynamicMethod = GetDynamicMethod(); // Pick your own implementation var generator = dynamicMethod.GetILGenerator(); var method = property.GetSetMethod(true); if(method != null) { if(!method.IsStatic) { generator.LoadArgument(0); if(method.DeclaringType.IsValueType) { generator.Emit(OpCodes.Unbox,method.DeclaringType); } generator.LoadArgument(1); } else { generator.LoadArgument(0); } if(method.DeclaringType.IsValueType) { generator.Emit(OpCodes.Unbox_Any,method.DeclaringType); } if((method.CallingConvention & CallingConventions.VarArgs) != 0) { if(method.IsFinal || !method.IsVirtual) { generator.EmitCall(OpCodes.Call,method,null); } else { generator.EmitCall(OpCodes.Callvirt,method,null); } } else { if(method.IsFinal || !method.IsVirtual) { generator.Emit(OpCodes.Call,method); } else { generator.Emit(OpCodes.Callvirt,method); } } generator.Emit(OpCodes.Ret); } No samples seem to demonstrate using DynamicMethod with value types.
I think this should solve your problem. I’ve tried to extract this snippet from my codebase in the simplest way possible. I do a lot of dynamic reflection and ran into this problem a while back.

var dynamicMethod = GetDynamicMethod(); // Pick your own implementation
var generator = dynamicMethod.GetILGenerator();
var method = property.GetSetMethod(true);

if(method != null)
{

if(!method.IsStatic)
{
generator.LoadArgument(0);

if(method.DeclaringType.IsValueType)
{
generator.Emit(OpCodes.Unbox,method.DeclaringType);
}
generator.LoadArgument(1);
}
else
{
generator.LoadArgument(0);
}

if(method.DeclaringType.IsValueType)
{
generator.Emit(OpCodes.Unbox_Any,method.DeclaringType);
}

if((method.CallingConvention & CallingConventions.VarArgs) != 0)
{
if(method.IsFinal || !method.IsVirtual)
{
generator.EmitCall(OpCodes.Call,method,null);
}
else
{
generator.EmitCall(OpCodes.Callvirt,method,null);
}
}
else
{
if(method.IsFinal || !method.IsVirtual)
{
generator.Emit(OpCodes.Call,method);
}
else
{
generator.Emit(OpCodes.Callvirt,method);
}
}
generator.Emit(OpCodes.Ret);

}

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