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| 1 | +using Microsoft.AspNetCore.Razor; |
| 2 | +using Microsoft.AspNetCore.Razor.CodeGenerators; |
| 3 | +using Microsoft.CodeAnalysis; |
| 4 | +using Microsoft.CodeAnalysis.CSharp; |
| 5 | +using System; |
| 6 | +using System.IO; |
| 7 | +using System.Reflection; |
| 8 | +using System.Runtime.Loader; |
| 9 | +using System.Text; |
| 10 | +using System.Threading.Tasks; |
| 11 | + |
| 12 | +namespace New |
| 13 | +{ |
| 14 | +public class NewRazor |
| 15 | +{ |
| 16 | +public static void Main(string[] args) |
| 17 | +{ |
| 18 | +Run().Wait(); |
| 19 | +} |
| 20 | + |
| 21 | +static async Task Run() |
| 22 | +{ |
| 23 | +// ホスト生成 |
| 24 | +var language = new CSharpRazorCodeLanguage(); |
| 25 | +var host = new RazorEngineHost(language) |
| 26 | +{ |
| 27 | +DefaultBaseClass = nameof(New) + "." + nameof(NewTemplateBase), |
| 28 | +DefaultClassName = "Generated", |
| 29 | +DefaultNamespace = "RazorTemplate", |
| 30 | +// 生成されるメソッド名の指定（これはデフォルトと同じものを指定している） |
| 31 | +GeneratedClassContext = new GeneratedClassContext( |
| 32 | +nameof(NewTemplateBase.ExecuteAsync), |
| 33 | +nameof(NewTemplateBase.Write), |
| 34 | +nameof(NewTemplateBase.WriteLiteral), |
| 35 | +new GeneratedTagHelperContext { } |
| 36 | +) |
| 37 | +}; |
| 38 | +// デフォルトで挿入する名前空間を追加 |
| 39 | +host.NamespaceImports.Add(nameof(System)); |
| 40 | +host.NamespaceImports.Add(nameof(System) + "." + nameof(System.Threading) + "." + nameof(System.Threading.Tasks)); |
| 41 | + |
| 42 | +var engine = new RazorTemplateEngine(host); |
| 43 | +using (var reader = new StreamReader(File.OpenRead("../Page.cshtml"))) |
| 44 | +{ |
| 45 | +//ソースコード生成 |
| 46 | +var generatorResults = engine.GenerateCode(reader); |
| 47 | +string source = generatorResults.GeneratedCode; |
| 48 | + |
| 49 | +//表示用 |
| 50 | +Console.Write(source); |
| 51 | +Console.WriteLine("------------------------------------------------------------------------"); |
| 52 | + |
| 53 | +var dllBase = Path.GetDirectoryName(typeof(object).GetTypeInfo().Assembly.Location); |
| 54 | +//使用アセンブリ参照 |
| 55 | +var references = new MetadataReference[] |
| 56 | +{ |
| 57 | +MetadataReference.CreateFromFile(typeof(object).GetTypeInfo().Assembly.Location), |
| 58 | +MetadataReference.CreateFromFile(dllBase + @"\mscorlib.dll"), |
| 59 | +MetadataReference.CreateFromFile(dllBase + @"\System.Runtime.dll"), |
| 60 | +MetadataReference.CreateFromFile(dllBase + @"\System.Linq.dll"), |
| 61 | +MetadataReference.CreateFromFile(dllBase + @"\System.Threading.Tasks.dll"), |
| 62 | +MetadataReference.CreateFromFile(typeof(NewTemplateBase).GetTypeInfo().Assembly.Location) |
| 63 | +}; |
| 64 | + |
| 65 | +//コンパイル |
| 66 | +var compilation = CSharpCompilation.Create("NewPage") |
| 67 | +.WithOptions(new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary)) |
| 68 | +.AddReferences(references) |
| 69 | +.AddSyntaxTrees(CSharpSyntaxTree.ParseText(source)); |
| 70 | + |
| 71 | +using (var ms = new MemoryStream()) |
| 72 | +{ |
| 73 | +var result = compilation.Emit(ms); |
| 74 | +ms.Seek(0, SeekOrigin.Begin); |
| 75 | +var assembly = AssemblyLoadContext.Default.LoadFromStream(ms); |
| 76 | + |
| 77 | +//実行 |
| 78 | +var typeName = host.DefaultNamespace + "." + host.DefaultClassName; |
| 79 | +var instance = assembly.CreateInstance(typeName) as NewTemplateBase;// .GetMethod(nameof(NewTemplateBase.Execute)) |
| 80 | +var generatedString = await instance.GenerateAsync(); |
| 81 | + |
| 82 | +//結果表示 |
| 83 | +Console.Write(generatedString); |
| 84 | +} |
| 85 | +} |
| 86 | +} |
| 87 | +} |
| 88 | + |
| 89 | +public abstract class NewTemplateBase |
| 90 | +{ |
| 91 | +StringBuilder builder = new StringBuilder(); |
| 92 | + |
| 93 | +public void Write(object value) |
| 94 | +{ |
| 95 | +builder.Append(value); |
| 96 | +} |
| 97 | + |
| 98 | +public void WriteLiteral(string literal) |
| 99 | +{ |
| 100 | +builder.Append(literal); |
| 101 | +} |
| 102 | + |
| 103 | +public abstract Task ExecuteAsync(); |
| 104 | + |
| 105 | +public async Task<string> GenerateAsync() |
| 106 | +{ |
| 107 | +await ExecuteAsync(); |
| 108 | +return builder.ToString(); |
| 109 | +} |
| 110 | +} |
| 111 | +} |
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