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我下载了 MonoDroid 开发环境。如果我创建一个新的“Android 应用程序的 Mono”项目，或者如果我在 MonoDevelop 中导入一个示例项目，我会立即在消息日志中弹出以下两条错误消息（并且无法构建/运行该项目）：

Error - 16:49:38 - Error running resgen
System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters. 
   at System.Convert.FromBase64String(String s)
   at MonoDevelop.Projects.Formats.MSBuild.MSBuildProjectService.GetProjectBuilder(TargetRuntime runtime, String toolsVersion, String file)
   at MonoDevelop.Projects.Formats.MSBuild.MSBuildProjectHandler.GetProjectBuilder()
   at MonoDevelop.Projects.Formats.MSBuild.MSBuildProjectHandler.RunTarget(IProgressMonitor monitor, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.SolutionItem.OnRunTarget(IProgressMonitor monitor, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.SolutionEntityItem.OnRunTarget(IProgressMonitor monitor, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.DefaultProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.ProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.ProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.ProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.ProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.ProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.ProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.ProjectServiceExtension.RunTarget(IProgressMonitor monitor, IBuildTarget item, String target, ConfigurationSelector configuration)
   at MonoDevelop.Projects.SolutionItem.RunTarget(IProgressMonitor monitor, String target, ConfigurationSelector configuration)
   at MonoDevelop.MonoDroid.MonoDroidProject.<RunResgen>b__13(Object )

Error - 16:49:38 - Parser database for project 'MonoA3 could not be loaded
System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters. 
   at System.Convert.FromBase64String(String s)
   at MonoDevelop.Projects.Formats.MSBuild.MSBuildProjectService.GetProjectBuilder(TargetRuntime runtime, String toolsVersion, String file)
   at MonoDevelop.Projects.Formats.MSBuild.MSBuildProjectHandler.GetProjectBuilder()
   at MonoDevelop.Projects.Formats.MSBuild.MSBuildProjectHandler.<MonoDevelop.Projects.Extensions.IAssemblyReferenceHandler.GetAssemblyReferences>d__2.MoveNext()
   at MonoDevelop.Projects.DotNetProject.<GetReferencedAssemblies>d__f.MoveNext()
   at MonoDevelop.Projects.Dom.Serialization.ProjectCodeCompletionDatabase.UpdateFromProject()
   at MonoDevelop.Projects.Dom.Serialization.ProjectCodeCompletionDatabase..ctor(Project project, ParserDatabase pdb)
   at MonoDevelop.Projects.Dom.Serialization.ParserDatabase.LoadProjectDom(Project project)
   at MonoDevelop.Projects.Dom.Parser.ProjectDomService.Load(Project project)

我多次卸载并重新安装了 MonoDevelop（V2.8.8.4，自动安装在德文版）和 MonoDroid（4.0.6），但仍然收到相同的错误消息（操作系统是 Win 7 Sp1）。在虚拟机（Win Vista，英文版）中，我可以运行它。我的问题是，我看不到导致问题的字符串。我在这里找到了导致此异常的代码块：

Process p = null;
try {
    p = runtime.ExecuteAssembly (pinfo);
    p.StandardInput.WriteLine (Process.GetCurrentProcess ().Id.ToString ());
    string sref = p.StandardError.ReadLine ();
    byte[] data = Convert.FromBase64String (sref);
    MemoryStream ms = new MemoryStream (data);
    BinaryFormatter bf = new BinaryFormatter ();
    builder = new RemoteBuildEngine (p, (IBuildEngine) bf.Deserialize (ms));
} catch {
    if (p != null) {
        try {
            p.Kill ();
        } catch { }
    }
    throw;
}

使用 TargetRuntime 运行时，ProcessStartInfo pinfo。看起来进程返回了一个不正确的 Base64 字符串的 StandardError。如何访问此流程的 StandardError 输出？我来自 Java 世界，我对 Mono/.NET 很陌生。

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1 回答 1

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我现在只是在调查这个错误。只是为了确认一下，您是说它在英文版的 Windows Vista 上运行良好，但是如果您使用德文版的 Windows 7 会引发异常？我将使用相同的软件版本在英文版的 Windows 7 上进行测试，看看我是否可以触发相同的问题。

于 2012-04-16T22:12:02.203 回答