您可以在運行時編寫代碼,使用CSharpCodeProvider().CompileAssemblyFromSource()
進行編譯並在當前程序集域中註冊您的類型。 只要域存在,它就會駐留在那裏。從結果中調用'get'訪問器會自動從編譯後的程序集中調用'Load'方法到當前的應用程序域中。
您也可以使用Reflection.Emit.TypeBuilder.CreateType()
來創建您的類型。此外,您可以強制將屬性標誌顯示爲編譯器生成的或此處的其他屬性。
var infoConstructor = typeof(CompilerGeneratedAttribute).GetConstructor(Type.EmptyTypes);
typeBuilder.SetCustomAttribute(infoConstructor, new byte[] { });
這就是我今天工作的例子。它的目的更多是爲了視覺目的,作爲一個自動生成的所有類代碼逆向工程的實體集合。似乎比使用文件I/O w/T4和XML輸出轉儲更好。雖然,這可能是一個可行的選擇,然後X-Doc/oxygen會自動生成HTML維基頁面,並且可以在下一版本的PDB中使用和編譯代碼。不是英國媒體報的粉絲,留在反思。
/// <summary>
/// CreateType
/// </summary>
/// <param name="obj"></param>
/// <param name="name"></param>
/// <param name="properties"></param>
/// <param name="accessor"></param>
/// <param name="hasSubTypes"></param>
/// <returns>The newly created type of the object.</returns>
internal static Type CreateType(this Mirror obj, string name, IEnumerable<string> properties, string accessor = "", bool hasSubTypes = false) {
Type subTypeRef = null;
// Tested Regex @ http://regex101.com
const string subTypes = @"(?:<|(?:\$))([a-zA-Z_]+[0-9`]*)(?:>([a-zA-Z_]+[0-9`]*))";
var match = Regex.Match(name, subTypes);
if (match.Success) {
var refType = match.Groups[1].Value; // Class reference type.
if (match.Groups[2].Success && !string.IsNullOrEmpty(match.Groups[2].Value))
accessor = match.Groups[2].Value; // Class accessor.
// ReSharper disable once TailRecursiveCall
var enumerable = properties as IList<string> ?? properties.ToList();
subTypeRef = CreateType(obj, refType, enumerable, accessor, true);
// Tokenize this for the actual derived class name.
name = name.Substring(0, name.IndexOf('+'));
}
// Check if formating of the class name matches traditional valid syntax.
// Assume at least 3 levels deep.
var toks = name.Split(new[] { '+' }, StringSplitOptions.RemoveEmptyEntries);
Type type = null;
foreach (var tok in toks.Reverse()) {
var o = obj.RefTypes.FirstOrDefault(t => t.Value.Name == tok);
if (!o.Equals(default(KeyValuePair<string, Type>)))
continue;
// Not exists.
var sb = new StringBuilder();
sb.Append(@"
using System;
using System.Runtime.CompilerServices;
using System.Collections.Generic;
using System.Linq;
namespace HearthMirror.TypeBuilder {
[CompilerGenerated]
public class ").Append(tok).AppendLine(@" {");
if (subTypeRef != null)
sb.AppendLine($" public {subTypeRef.Name} {accessor}").AppendLine(" { get; set; }");
sb.Append(" }\n}");
var asm = RuntimeCodeCompiler.CompileCode(sb.ToString());
type = asm.GetType($"{MethodBase.GetCurrentMethod().ReflectedType?.Namespace}.{tok}"); // => generated
// Register our type for reference. This container will handle collisions and throw if encountered.
obj.RefTypes.Add(tok, type);
}
return type;
}
/// <summary>
/// CompileCode
/// </summary>
/// <param name="code"></param>
/// <returns></returns>
public static Assembly CompileCode(string code) {
var provider = new CSharpCodeProvider();
var compilerparams = new CompilerParameters { GenerateExecutable = false, GenerateInMemory = true, IncludeDebugInformation = true };
foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies()) {
try {
var location = assembly.Location;
if (!string.IsNullOrEmpty(location))
compilerparams.ReferencedAssemblies.Add(location);
} catch (NotSupportedException) {
// this happens for dynamic assemblies, so just ignore it.
}
}
var results = provider.CompileAssemblyFromSource(compilerparams, code);
if (results.Errors.HasErrors) {
var errors = new StringBuilder("Compiler Errors :\r\n");
foreach (CompilerError error in results.Errors)
errors.AppendFormat("Line {0},{1}\t: {2}\n", error.Line, error.Column, error.ErrorText);
throw new Exception(errors.ToString());
}
AppDomain.CurrentDomain.Load(results.CompiledAssembly.GetName());
return results.CompiledAssembly;
}
@Thomas Levesque的:我測試你的代碼,它的工作。但是,它在使用ReflectionOnlyLoadFrom(path)加載程序集時引發了異常。快速搜索後,使用CustomAttributeData.GetCustomAttribute(type)並將每個attribute.ToString()與「[System.Runtime.CompilerServices.CompilerGeneratedAttribute()]」進行比較。謝謝。 – bricklayer137 2013-05-03 18:18:18