Question

我下载了MonoDroid开发环境。如果我创建一个新的'Mono for Android Application'项目或者我在MonoDevelop中导入一个示例项目，我会立即得到消息日志中弹出的以下两个错误消息（并且无法构建/运行项目）：

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MonoDevelop（V2.8.8.4，自动安装在德语版本）和MonoDroid（4.0.6），但仍然得到相同的错误消息（操作系统是Win 7 Sp1）。在VM（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。导致此异常的代码块我找到here：

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。它看起来像Process返回的StandardError不是正确的Base64字符串。如何访问此Process的StandardError输出？我来自Java-World，我是Mono / .NET的新手。

Answer 1

我现在正在调查这个bug。只是为了确认，你说它在英文版的Windows Vista上运行正常但是如果你使用德语版的Windows 7会引发异常吗？我将使用相同的软件版本在Windows 7的英文版上进行测试，如果我能触发相同的问题，我将会看到它。

MonoDevelop / MonoDroid项目/构建错误：不是有效的base-64字符串

1 个答案: