public CodeCompileUnit GetCodeCompileUnit(string className, string template, ISet <string> namespaceImports, Type templateType, Type modelType)
{
if (string.IsNullOrEmpty(className))
{
throw new ArgumentException("Class name is required.");
}
if (string.IsNullOrEmpty(template))
{
throw new ArgumentException("Template is required.");
}
namespaceImports = namespaceImports ?? new HashSet <string>();
templateType = templateType ?? ((modelType == null) ? typeof(TemplateBase) : typeof(TemplateBase <>));
// Create the RazorEngineHost
var host = CreateHost(templateType, modelType, className);
// Add any required namespace imports
foreach (string ns in GetNamespaces(templateType, namespaceImports))
{
host.NamespaceImports.Add(ns);
}
// Gets the generator result.
GeneratorResults result = GetGeneratorResult(host, template);
// Add the dynamic model attribute if the type is an anonymous type.
var type = result.GeneratedCode.Namespaces[0].Types[0];
if (modelType != null && CompilerServicesUtility.IsAnonymousType(modelType))
{
type.CustomAttributes.Add(new CodeAttributeDeclaration(new CodeTypeReference(typeof(HasDynamicModelAttribute))));
}
// Generate any constructors required by the base template type.
GenerateConstructors(CompilerServicesUtility.GetConstructors(templateType), type);
// Despatch any inspectors
Inspect(result.GeneratedCode);
return(result.GeneratedCode);
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (binder == null)
{
throw new ArgumentNullException("binder");
}
var dynamicObject = Model as RazorDynamicObject;
if (dynamicObject != null)
{
return(dynamicObject.TryGetMember(binder, out result));
}
Type modelType = Model.GetType();
var prop = modelType.GetProperty(binder.Name);
if (prop == null)
{
result = null;
return(false);
}
object value = prop.GetValue(Model, null);
if (value == null)
{
result = value;
return(true);
}
Type valueType = value.GetType();
result = (CompilerServicesUtility.IsAnonymousType(valueType))
? new RazorDynamicObject {
Model = value
}
: value;
return(true);
}
public virtual string BuildTypeName(Type templateType, Type modelType)
{
if (templateType == null)
{
throw new ArgumentNullException("templateType");
}
if (!templateType.IsGenericTypeDefinition && !templateType.IsGenericType)
{
return(templateType.FullName);
}
if (modelType == null)
{
throw new ArgumentException("The template type is a generic defintion, and no model type has been supplied.");
}
bool @dynamic = CompilerServicesUtility.IsDynamicType(modelType);
Type genericType = templateType.MakeGenericType(modelType);
return(BuildTypeNameInternal(genericType, @dynamic));
}
/// <summary>
/// Initialises a new instance of <see cref="TypeContext"/>.
/// </summary>
internal TypeContext()
{
ClassName = CompilerServicesUtility.GenerateClassName();
Namespaces = new HashSet <string>();
}
private byte[] CompileByte(string originalClassName, string originalText)
{
Console.WriteLine(assemblieslist);
if (assemblieslist == null)
{
string replstr = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "file:///" : "file://";
var assemblies = CompilerServicesUtility
.GetLoadedAssemblies()
.Where(a => !a.IsDynamic && File.Exists(a.CodeBase.Replace(replstr, "")))
.Select(a => (a.CodeBase.Replace(replstr, "")));
int c = assemblies.Count();
assemblieslist = new MetadataReference[c];
int i = 0;
foreach (string item in assemblies)
{
assemblieslist[i] = (MetadataReference.CreateFromFile(item));
i++;
}
}
CSharpCompilation compilation = null;
var syntaxTree = CSharpSyntaxTree.ParseText(originalText);
// 指定编译选项。
var assemblyName = $"{originalClassName}.g";
compilation = CSharpCompilation.Create(assemblyName, new[] { syntaxTree },
options: new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary))
.AddReferences(
// 这算是偷懒了吗？我把 .NET Core 运行时用到的那些引用都加入到引用了。
// 加入引用是必要的，不然连 object 类型都是没有的，肯定编译不通过。
//AppDomain.CurrentDomain.GetAssemblies().Select(x => MetadataReference.CreateFromFile(x.Location))
assemblieslist
);
// 编译到内存流中。
byte [] buff = null;
using (var ms = new MemoryStream())
{
var result = compilation.Emit(ms);
if (result.Success)
{
ms.Seek(0, SeekOrigin.Begin);
buff = ms.ToArray();
}
else
{
string errmsg = "";
for (int i1 = 0; i1 < result.Diagnostics.Length; i1++)
{
errmsg += result.Diagnostics[i1] + "\r\n";
}
throw new Exception(errmsg);
}
ms.Close();
}
/*
* for (int i1=0;i1< list.Length;i1++)
* {
* list[i1] = null;
* }
*/
return(buff);
// }
//catch (Exception e)
//{
//}
return(null);
}
