Can I expand a string that contains C# literal expressions at runtime

Question

If I have a string that contains a c# string literal expression can I \"expand\" it at runtime

    public void TestEvaluateString()
    {
        string Dumm         


        

Answer 1

Not sure if this is the simplest way, but by referencing the Microsoft.JScript namespace you can reparse it with the javascript eval function.

Here's a test for the code at the bottom

var evalToString = Evaluator.MyStr("test \\r\\n test");

This will turn the \r into a carriage return.

And the implementation

public class Evaluator
{
    public static object MyStr(string statement)
    {
        return _evaluatorType.InvokeMember(
                    "MyStr",
                    BindingFlags.InvokeMethod,
                    null,
                    _evaluator,
                    new object[] { statement }
                 );
    }

    static Evaluator()
    {
        ICodeCompiler compiler;
        compiler = new JScriptCodeProvider().CreateCompiler();

        CompilerParameters parameters;
        parameters = new CompilerParameters();
        parameters.GenerateInMemory = true;

        CompilerResults results;
        results = compiler.CompileAssemblyFromSource(parameters, _jscriptSource);

        Assembly assembly = results.CompiledAssembly;
        _evaluatorType = assembly.GetType("Evaluator.Evaluator");

        _evaluator = Activator.CreateInstance(_evaluatorType);
    }

    private static object _evaluator = null;
    private static Type _evaluatorType = null;
    private static readonly string _jscriptSource =

        @"package Evaluator
        {
           class Evaluator
           {
              public function MyStr(expr : String) : String 
              { 
                 var x;
                 eval(""x='""+expr+""';"");
                 return x;
              }
           }
        }";
}