Excecute A C# Command that Stored in String Variable?

Question

Possible Duplicate:
C# eval equivalent?

Is it possible to Execute a C# command that is stored in a string variable

a thing like Dynamic query in SqlServer

I doubt that would be possible since the string wouldn't get parsed until after the program has been compiled — Ayush, Jan 20 '12 at 16:49
@xbonez: It's possible to emit your own IL and execute it so I would say it's most definitely possible. — Austin Salonen, Jan 20 '12 at 16:52
This might look like a duplicate, but the older question specifically asks about C# 2.0, for which the answer is "no". I don't think this question should be closed as a duplicate. — driis, Jan 20 '12 at 16:56

score 1 · Answer 1 · answered Jan 20 '12 at 16:49

1

There is nothing built into the current version of .NET that allows this. However the Roslyn project aims to specifically enable scenarios like this. They have a CTP out.

A simple example, (from Kirill Osenkov's blog), is:

[TestMethod]
public void SimpleEvaluationUsingScriptEngine()
{
    ScriptEngine engine = new ScriptEngine();
    int result = engine.Execute<int>("1 + 2");
    Assert.AreEqual(3, result);
}

answered Jan 20 '12 at 16:49

driis

161,458
45
265
341

This seems outside the scope of Roslyn, which is just code analysis – Chris Pitman Jan 20 '12 at 16:51
@Chris, actually Roslyn aims to provide full REPL / scripting capabilities, amongst other things. Check out some of the links. – driis Jan 20 '12 at 16:53
Ok, cool. I feel like the scope of Roslyn keeps changing. – Chris Pitman Jan 20 '12 at 16:55

score 0 · Answer 2 · answered Jan 20 '12 at 16:58

0

You can use CSharpCodeProvider to compile source code from a file or from strings into an assembly you can load. Then you can invoke the generated classes via reflexion.

answered Jan 20 '12 at 16:58

Falanwe

4,636
22
37

Excecute A C# Command that Stored in String Variable?

2 Answers2