如何获取用某个属性注释的所有属性? [英] How to get all properties that are anotated with some attribute?

问题描述

我刚开始使用 Roslyn，我想找到所有用属性名称OneToOne"注释的属性.我启动了 SyntaxVisualizer 并能够获得对该节点的引用，但我想知道是否有更简单的方法来实现这一点.这就是我所拥有的:

I am just starting with Roslyn, and I want to find all properties that are annotated with attribute names "OneToOne". I fired up SyntaxVisualizer and was able to get reference to that node, but I am wondering is there a simpler way to achieve this. This is what I have:

var prop = document.GetSyntaxRoot()
             .DescendantNodes()
             .OfType<PropertyDeclarationSyntax>()
             .Where(p => p.DescendantNodes()
                 .OfType<AttributeSyntax>()
                 .Any(a => a.DescendantNodes()
                     .OfType<IdentifierNameSyntax>()
                     .Any(i => i.DescendantTokens()
                         .Any(dt => dt.Kind == SyntaxKind.IdentifierToken
                                 && dt.ValueText == "OneToOne"))))

推荐答案

好吧，我会使用语义而不是语法来解决这个问题.像(从我的头顶):

Well, I would go about this using Semantics, not Syntax. Something like (off the top of my head):

var attributeSymbol = compilation.GetTypeByMetadataName("ConsoleApplication1.OneToOneAttribute");
var propertySymbol = compilation.GetTypeByMetadataName("ConsoleApplication1.Program")
                     .GetMembers()
                     .Where(m => 
                            m.Kind == CommonSymbolKind.Property && 
                            m.GetAttributes().Any(a => a.AttributeClass.MetadataName == attributeSymbol.MetadataName));

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