Menu
I'm not sure if I'm totally missing something here but I can't find any way to determine if a parameter is passed by reference or not by using reflection.
ArgumentInfo has a property "IsOut", but no "IsRef". How would I go about to get all reference parameters in a given MethodInfo?
203
A reference parameter is a reference to a memory location of a variable. When you pass parameters by reference, unlike value parameters, a new storage location is not created for these parameters. The reference parameters represent the same memory location as the actual parameters that are supplied to the method.
ref is used to state that the parameter passed may be modified by the method. in is used to state that the parameter passed cannot be modified by the method. out is used to state that the parameter passed must be modified by the method.
The out is a keyword in C# which is used for the passing the arguments to methods as a reference type. It is generally used when a method returns multiple values. The out parameter does not pass the property. The ref is a keyword in C# which is used for the passing the arguments by a reference.
The REF method is useful for counting the number of occurrences of each key in a hash object. The REF method initializes the key summary for each key on the first ADD, and then changes the ADD for each subsequent CHECK.
ParameterInfo[] parameters = myMethodInfo.GetParameters(); foreach(ParameterInfo parameter in parameters) { bool isRef = parameterInfo.ParameterType.IsByRef; } ParameterType.IsByRef will return true for both ref and out parameters.
If you have a ParameterInfo object (e.g. from MethodInfo.GetParameters()), then:
out if parameterInfo.ParameterType.IsByRef && parameterInfo.IsOut ref if parameterInfo.ParameterType.IsByRef && parameterInfo.IsOut == false If you don't do the IsByRef check for out parameters, then you'll incorrectly get members decorated with the [Out] attribute from System.Runtime.InteropServices but which aren't actually C# out parameters.
31
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
