using reflection to get the name of a parameter

Question

I have a c# .net 2.0CF application where I would like to get not only the type and value of a parameter passed to the function, but also the variable name.

For example:

void Show<PARAM>(PARAM p)
{
    Debug.WriteLine(string.Format("{0} {1} = {2}", typeof(PARAM).ToString, ???, p.ToString() );
}

bool foo = true;
Show(foo);

would output "bool foo = true";

In C++, I can do this with the ## pre-processor macro.

If this can't be done in 2.0, can it be done in 3.5 or 4.0?

Thanks, PaulH

http://stackoverflow.com/questions/755254/getting-the-name-of-the-parameter-passed-into-a-method — grenade, Dec 16 '10 at 23:29
neat trick for doing this (i think C# 3.0 would be required): http://stackoverflow.com/questions/869610/c-resolving-a-parameter-name-at-runtime — Jake, Dec 17 '10 at 01:06

score 1 · Accepted Answer · answered Dec 16 '10 at 23:27

1

If I remember correctly, this is not possible with reflection as variable names are not in the assemblies, and p is a variable name.

answered Dec 16 '10 at 23:27

Femaref

60,705
7
138
176

Amit Bagga · Answer 2 · 2010-12-20T08:51:28.177

0

using System.Reflection;


ParameterInfo[] info = MethodInfo.GetCurrentMethod().GetParameters();
System.Diagnostics.StackTrace trace = new System.Diagnostics.StackTrace(false);
System.Diagnostics.StackFrame[] frames = trace.GetFrames();

i guess the value can be retrieved from stack frames.

The Paramter Name can be found from the

ParameterInfo[] info = MethodInfo.GetCurrentMethod().GetParameters();

edited Dec 20 '10 at 08:51

answered Dec 17 '10 at 02:16

Amit Bagga

648
3
11

StackTrace and StackFrame aren't available in the Compact Framework. – PaulH Dec 17 '10 at 15:06
also, this isn't true. `StackFrame` only contains file, line and column and the `MethodBase`. Neither contains the original parameter names. – Femaref Dec 17 '10 at 15:23

score 0 · Answer 3 · answered Dec 20 '10 at 09:41

0

public void Show(int value)
    {
        ParameterInfo[] info = MethodInfo.GetCurrentMethod().GetParameters();
        Trace.WriteLine(string.Format("{0} {1}={2}", info[0].ParameterType.ToString(), info[0].Name, value.ToString()));
    }

output

System.Int32 value=10

answered Dec 20 '10 at 09:41

Amit Bagga

648
3
11

Unfortunately, the CF does not have a MethodInfo.GetCurrentMethod(). – PaulH Dec 20 '10 at 14:54
Try using PostSharp it has the support for Compact Framework. – Amit Bagga Dec 20 '10 at 17:01

score 0 · Answer 4 · answered Dec 20 '10 at 16:59

0

Try using PostSharp it has the support for Compact Framework.

answered Dec 20 '10 at 16:59

Amit Bagga

648
3
11

using reflection to get the name of a parameter

4 Answers4