问题
I recently installed the Visual Studio 11 Beta, and I'm trying to update an existing 4.0 project to use 4.5. In the program it compiles some dynamically generated code using CSharpCodeProvider.
/// <summary>
/// Compile and return a reference to the compiled assembly
/// </summary>
private Assembly Compile()
{
var referencedDlls = new List<string>
{
"mscorlib.dll",
"System.dll",
"System.Core.dll",
};
referencedDlls.AddRange(RequiredReferences);
var parameters = new CompilerParameters(
assemblyNames: referencedDlls.ToArray(),
outputName: GeneratedDllFileName,
// only include debug information if we are currently debugging
includeDebugInformation: Debugger.IsAttached);
parameters.TreatWarningsAsErrors = false;
parameters.WarningLevel = 0;
parameters.GenerateExecutable = false;
parameters.GenerateInMemory = false;
parameters.CompilerOptions = "/optimize+ /platform:x64";
string[] files = Directory.GetFiles(GenerationDirectory, "*.cs");
var compiler = new CSharpCodeProvider(
new Dictionary<string, string> { { "CompilerVersion", "v4.5" } });
var results = compiler.CompileAssemblyFromFile(parameters, files);
if (results.Errors.HasErrors)
{
string firstError =
string.Format("Compile error: {0}", results.Errors[0].ToString());
throw new ApplicationException(firstError);
}
else
{
return results.CompiledAssembly;
}
}
The problem comes when I changed the CompilerVersion
from { "CompilerVersion", "v4.0" }
to { "CompilerVersion", "v4.5" }
I now get an exception
Compiler executable file csc.exe cannot be found.
Is specifying CompilerVersion
the wrong way to tell it to use 4.5? Will compiling it as v4.5 even make a difference since the code won't be using any new 4.5 specific features?
回答1:
It would have helped if you'd given us a short but complete program to demonstrate the problem, but I can verify that with "v4.0" it will work and compile async methods, assuming you're running on a machine with the VS11 beta installed.
Demonstration:
using System;
using System.Collections;
using System.Reflection;
using System.Collections.Generic;
using System.Diagnostics;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
namespace Foo {}
class Program
{
static void Main(string[] args)
{
var referencedDll = new List<string>
{
"mscorlib.dll",
"System.dll",
"System.Core.dll",
};
var parameters = new CompilerParameters(
assemblyNames: referencedDll.ToArray(),
outputName: "foo.dll",
includeDebugInformation: false)
{
TreatWarningsAsErrors = true,
// We don't want to be warned that we have no await!
WarningLevel = 0,
GenerateExecutable = false,
GenerateInMemory = true
};
var source = new[] { "class Test { static async void Foo() {}}" };
var options = new Dictionary<string, string> {
{ "CompilerVersion", "v4.0" }
};
var compiler = new CSharpCodeProvider(options);
var results = compiler.CompileAssemblyFromSource(parameters, source);
Console.WriteLine("Success? {0}", !results.Errors.HasErrors);
}
}
来源:https://stackoverflow.com/questions/9591584/using-csharpcodeprovider-with-net-4-5-beta