如何从继承自 Microsoft.VisualStudio.TextTemplated.VSHost.BaseCodeGeneratorWithSite 的类访问 CodeDomProvider？

Question

有谁知道如何从 Visual Studio 2010 SDK 中的新 Microsoft.VisualStudio.TextTemplated.VSHost.BaseCodeGeneratorWithSite 中获取 CodeDomProvider ？我过去只是通过继承 Microsoft.CustomTool.BaseCodeGeneratorWithSite 类来访问它，但现在有了这个新类，它就不存在了。我看到 GlobalServiceProvider 和 SiteServiceProvider 但我找不到任何有关如何使用它们的示例。

Microsoft.VisualStudio.TextTemplate.VSHost.BaseCodeGeneratorWithSite： http://msdn.microsoft.com/en-us/library/bb932625。 aspx

我是这样做的：

public class Generator : Microsoft.VisualStudio.TextTemplating.VSHost.BaseCodeGeneratorWithSite {

    public override string GetDefaultExtension() {
        // GetDefaultExtension IS ALSO NOT ACCESSIBLE...
        return this.InputFilePath.Substring(this.InputFilePath.LastIndexOf(".")) + ".designer" + base.GetDefaultExtension();
    }

    // This method is being called every time the attached xml is saved.
    protected override byte[] GenerateCode(string inputFileName, string inputFileContent) {
        try {
            // Try to generate the wrapper file.
            return GenerateSourceCode(inputFileName);
        } catch (Exception ex) {
            // In case of a faliure - print the exception 
            // as a comment in the source code.
            return GenerateExceptionCode(ex);
        }
    }

    public byte[] GenerateSourceCode(string inputFileName) {
        Dictionary<string, CodeCompileUnit> oCodeUnits;

        // THIS IS WHERE CodeProvider IS NOT ACCESSIBLE
        CodeDomProvider oCodeDomProvider = this.CodeProvider;

        string[] aCode = new MyCustomAPI.GenerateCode(inputFileName, ref oCodeDomProvider);
        return Encoding.ASCII.GetBytes(String.Join(@"
", aCode));
    }

    private byte[] GenerateExceptionCode(Exception ex) {
        CodeCompileUnit oCode = new CodeCompileUnit();

        CodeNamespace oNamespace = new CodeNamespace("System");
        oNamespace.Comments.Add(new CodeCommentStatement(MyCustomAPI.Print(ex)));
        oCode.Namespaces.Add(oNamespace);
        string sCode = null;
        using (StringWriter oSW = new StringWriter()) {
            using (IndentedTextWriter oITW = new IndentedTextWriter(oSW)) {
                this.CodeProvider.GenerateCodeFromCompileUnit(oCode, oITW, null);
                sCode = oSW.ToString();
            }
        }
        return Encoding.ASCII.GetBytes(sCode );
    }
}

感谢您的帮助！

Answer 1

您可以通过请求 SVSMDCodeDomProvider 服务，通过 SiteServiceProvider 访问 CodeDomProvider。

大致意思是：

IVSMDCodeDomProvider provider = SiteServiceProvider. 
        GetService(typeof(SVSMDCodeDomProvider)) as IVSMDCodeDomProvider;

if (provider != null)
{
    codeDomProvider = provider.CodeDomProvider as CodeDomProvider;
}

SiteServiceProvider 是 SingleFileGenerator 站点公开的有限范围服务提供者，而 GlobalServiceProvider 是 VS 的主要服务提供者，您可以要求任何全局范围的接口。

希望这有帮助。
加雷思