Question

My question concerns c# and how to access Static members … Well I don’t really know how to explain it (which kind of is bad for a question isn’t it?) I will just give you some sample code:

Class test<T>{      int method1(Obj Parameter1){          //in here I want to do something which I would explain as          T.TryParse(Parameter1);           //my problem is that it does not work ... I get an error.          //just to explain: if I declare test<int> (with type Integer)          //I want my sample code to call int.TryParse(). If it were String          //it should have been String.TryParse()      } } 

So thank you guys for your answers (By the way the question is: how would I solve this problem without getting an error). This probably quite an easy question for you!

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Edit: Thank you all for your answers!

Though I think the try – catch phrase is the most elegant, I know from my experience with vb that it can really be a bummer. I used it once and it took about 30 minutes to run a program, which later on only took 2 minutes to compute just because I avoided try – catch.

This is why I chose the switch statement as the best answer. It makes the code more complicated but on the other hand I imagine it to be relatively fast and relatively easy to read. (Though I still think there should be a more elegant way … maybe in the next language I learn)

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Though if you have some other suggestion I am still waiting (and willing to participate)

Answer 1

One more way to do it, this time some reflection in the mix:

static class Parser {     public static bool TryParse<TType>( string str, out TType x )     {         // Get the type on that TryParse shall be called         Type objType = typeof( TType );          // Enumerate the methods of TType         foreach( MethodInfo mi in objType.GetMethods() )         {             if( mi.Name == 'TryParse' )             {                 // We found a TryParse method, check for the 2-parameter-signature                 ParameterInfo[] pi = mi.GetParameters();                 if( pi.Length == 2 ) // Find TryParse( String, TType )                 {                     // Build a parameter list for the call                     object[] paramList = new object[2] { str, default( TType ) };                      // Invoke the static method                     object ret = objType.InvokeMember( 'TryParse', BindingFlags.InvokeMethod, null, null, paramList );                      // Get the output value from the parameter list                     x = (TType)paramList[1];                     return (bool)ret;                 }             }         }          // Maybe we should throw an exception here, because we were unable to find the TryParse         // method; this is not just a unable-to-parse error.          x = default( TType );         return false;     } } 

The next step would be trying to implement

public static TRet CallStaticMethod<TRet>( object obj, string methodName, params object[] args ); 

With full parameter type matching etc.