Roslyn Analyzer 未清除上次诊断答案

【问题标题】：Roslyn Analyzer not clearing last diagnosticRoslyn Analyzer 未清除上次诊断
【发布时间】：2021-05-07 22:03:23
【问题描述】：

我创建了一个 Roslyn 分析器，它根据一组规则验证文本文件，并注意到当我修复最后一个问题时，诊断并没有消失。我创建了一个简单的示例来复制下面的问题。

[DiagnosticAnalyzer(LanguageNames.CSharp)]
public class Analyzer1Analyzer : DiagnosticAnalyzer
{
    public const string DiagnosticId = "TestCompilationAnalyzer";

    private static readonly LocalizableString Title = "TestAnalyzer";
    private static readonly LocalizableString MessageFormat = "This message should always appear {0}";
    private static readonly DiagnosticDescriptor Rule = new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat, "Test", DiagnosticSeverity.Warning, isEnabledByDefault: true);
    public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get { return ImmutableArray.Create(Rule); } }

    public override void Initialize(AnalysisContext context)
    {
        context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.ReportDiagnostics);
        context.EnableConcurrentExecution();
        context.RegisterAdditionalFileAction(AdditionalFileAction);
    }

    private void AdditionalFileAction(AdditionalFileAnalysisContext cxt)
    {
        var text = File.ReadAllText(cxt.AdditionalFile.Path);

        if (text.Contains("help"))
        {
            cxt.ReportDiagnostic(Diagnostic.Create(Rule, Location.None, $"help"));
        }

        if (text.Contains("test"))
        {
            cxt.ReportDiagnostic(Diagnostic.Create(Rule, Location.None, $"test"));
        }
    }
}

如果我将帮助和测试这两个词添加到我的附加文件中，则会出现两个诊断信息，但如果我删除这两个词，最后显示的内容不会消失。

【问题讨论】：

标签： c# roslyn

【解决方案1】：

我找到了使用代码生成器的解决方法

    [Generator]
    public class SchemaTestAnalyzer : ISourceGenerator
    {

        public const string DiagnosticId = "TestCompilationAnalyzer";

        private static readonly LocalizableString Title = "TestAnalyzer";
        private static readonly LocalizableString MessageFormat = "This message should always appear {0}";
        private static readonly DiagnosticDescriptor Rule = new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat, "Test", DiagnosticSeverity.Warning, isEnabledByDefault: true);

        public void Execute(GeneratorExecutionContext context)
        {
            var additionalFile = context.AdditionalFiles.FirstOrDefault();
            if (additionalFile != null)
            {
                var text = File.ReadAllText(additionalFile.Path);
                if (text.Contains("help"))
                {
                    context.ReportDiagnostic(Diagnostic.Create(Rule, Location.None, "help"));
                }

                if (text.Contains("test"))
                {
                    context.ReportDiagnostic(Diagnostic.Create(Rule, Location.None, "test"));
                }
            }
        }

        public void Initialize(GeneratorInitializationContext context) { }
    }

这些工作按预期进行，最后一个问题在解决和重新分析后消失

【讨论】：