private void Compile(CodeDom.CodeDomProvider provider)
{
const string source =
"public class Sample5Mem {public void Do(){System.Console.WriteLine(\"Hello World\");System.Console.ReadLine();} }";
var param = new CodeDom.CompilerParameters
{
GenerateExecutable = false,
IncludeDebugInformation = false,
GenerateInMemory = true
};
CodeDom.CompilerResults cr = provider.CompileAssemblyFromSource(param, source);
object instance = cr.CompiledAssembly.CreateInstance("Sample5Mem");
if (instance != null)
{
Type type = instance.GetType();
type.InvokeMember("Do",
BindingFlags.InvokeMethod | BindingFlags.Default,
null,
instance,
null);
}
}
private static Assembly Compile(string migration)
{
SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(migration);
string assemblyName = Path.GetRandomFileName();
MetadataReference[] references = new[]
{
MetadataReference.CreateFromFile(typeof(object).Assembly.Location), // System
MetadataReference.CreateFromFile(typeof(Enumerable).Assembly.Location), // System.Linq
MetadataReference.CreateFromFile(typeof(GeneratedCodeAttribute).Assembly.Location),
MetadataReference.CreateFromFile(typeof(DbType).Assembly.Location), // System.Data
MetadataReference.CreateFromFile(typeof(ExportAttribute).Assembly.Location), // System.ComponentModel.Composition
MetadataReference.CreateFromFile(typeof(IDatabase).Assembly.Location), // MigSharp
};
CSharpCompilation compilation = CSharpCompilation.Create(assemblyName, new[] { syntaxTree }, references, new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));
using (var ms = new MemoryStream())
{
EmitResult result = compilation.Emit(ms);
List<string> compilationErrors = new List<string>();
foreach (Diagnostic diagnostic in result.Diagnostics.Where(diagnostic =>
diagnostic.IsWarningAsError ||
diagnostic.Severity == DiagnosticSeverity.Error))
{
compilationErrors.Add(diagnostic.Id + ": " + diagnostic.GetMessage());
}
CollectionAssert.IsEmpty(compilationErrors, "Could not compile migration."); // this nicely outputs the compilation errors at the top of the output
Assert.IsTrue(result.Success, "Could not compile migration.");
ms.Seek(0, SeekOrigin.Begin);
return Assembly.Load(ms.ToArray());
}
}
