How to generate Semantic Model from code file without project file using Roslyn

Question

I have two file as below:

namespace a
{
    Class Audi
    {
            public string Model(string a)
            {           
               Benz obj= new Benz();
               var str=obj.BenzDetails();
               return str;

            }
    }
}
namespace a
{
    Class Benz 
    {
            public string BenzDetails()
            {           
              return "some details";
            }
    }
}

I need to get all objects created in Audi Class (Global or local). Also i need to get details of methods invoked using these declared object.

For example in these 2 classes, for Audi class need:

Object created :- obj
Method invoked using this object :- BenzDetails
name of class whose object is created: Benz
namespace of that class: a

I am able to get list of declared objects in a class with this code:

 var lstLocalObjects = syntaxTree.GetRoot().DescendantNodes().OfType<LocalDeclarationStatementSyntax>()
                                                .Where(x => x.Declaration.Variables.Any(p => p.Initializer.Value.Kind().ToString().Equals("ObjectCreationExpression", StringComparison.OrdinalIgnoreCase)));

I have syntax tree, I don't know how to generate Semantic Model. Is it possible to get above details using syntax tree only. Please help. Thank you

SLaks · Accepted Answer · 2018-03-15 15:14:51Z

2

You need to create a Compilation by calling CSharpCompilation.Create(), passing your SyntaxTree and the necessary references (at least mscorlib).

You can then call GetSemanticModel(SyntaxTree).

answered Mar 15, 2018 at 15:14

SLaks

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2 Comments

George Alexandria Over a year ago

@Gerry, just look at the simple example that create a simple Compilation. For your example just add invocation of GetSemanticModel(SyntaxTree tree, bool ignoreAccessibility) from Compilation

Gurmeet Over a year ago

It throws exception : MetadataReference.CreateFromFile(typeof(object).Assembly.Location) Could not load file or assembly 'System.Reflection.Metadata

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