I need to have a textbox on a ASP.NET page in which a user would paste code and select one of the preset languages (C#, VB.NET, Python, Ruby etc) and I need to verify if the code compiles successfully. If it doesn t, then I need to show the errors and warnings with line numbers.
How do I go about doing this?
You ll need to host all sorts of compilers you d like to support and use their APIs. If a compiler doesn t expose an API, you d need to use System.Diagnostics.Process to launch it and grab the output for parsing.
This is far from a trivial task though.
If you re confident you need this, ask yourself several questions.
And this is just the tip of the iceberg.
Answering your comment, yes, there is a compiler API for C# and VB .NET which is called CodeDOM.
There s plenty of information about it on the net. You may want to check out this question as well.
You may want to take a look at the Roslyn project (formerly Compiler as a Service) at http://msdn.microsoft.com/en-us/roslyn which was released yesterday. This is the new compiler APIs coming for C# and VB. It won t help for Python or Ruby but should do what you need for C# and VB once it ships (post Dev 11).
For C# and VB, using the Roslyn CTP to create a Compilation object, then call the GetDiagnostics() method to determine the errors.
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