如何获取具有可变数量的参数的函数的ParameterInfo？

Question

How to get the ParameterInfo of a function with variable number of params? The problem is when I call the method

MyFunction(object o1, out object o2);

I can get the parameterInfo of sendData but not the o1 and o2 object.

protected object[] MyFunction(params object[] sendData)
{
     StackTrace callStack = new StackTrace(0, false);
     StackFrame callingMethodFrame = callStack.GetFrame(0);
     MethodBase callingMethod = callingMethodFrame.GetMethod();
     ParameterInfo[] parametersInfo = callingMethod.GetParameters();

     List<object> inParams = new List<object>();
     List<object> outParams = new List<object>();

     for (int i = 0; i < sendData.Length; i++)
     {
         object value = sendData[i];
         ParameterInfo info = parametersInfo[parametersInfo.Length - sendData.Length + i];

         if (info.IsOut)
         {
              outParams.Add(value);
         }
         else
         {
              inParams.Add(value);
         }
     }
     ..........
}

Thanks in advance for helping me.

Arnaud

Answer 1

'params' is just C# syntactic sugar. In fact, at metadata .NET level, there is only one parameter named "sendData" with a specific "ParamArray" attribute set.