不支持给定的路径格式;流编写器

Question

下面是堆栈跟踪;

System.NotSupportedException
HResult=0x80131515
Message=The given path's format is not supported.
Source=mscorlib
StackTrace:
at System.Security.Permissions.FileIOPermission.EmulateFileIOPermissionChecks(String fullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access)
at EntryLog.Handlers.StreamEntryLogs.StreamWritter(String log, String foldername) in C:UsersJNyingisourcereposEntryLogEntryLogHandlersStreamEntryLogs.cs:line 31
at EntryLog.EntryLog.LogWarning(String Warning) in C:UsersJNyingisourcereposEntryLogEntryLogEntryLog.cs:line 55
at EntryLogConsoleTest.Program.Main(String[] args) in C:UsersJNyingisourcereposEntryLogConsoleTestEntryLogConsoleTestProgram.cs:line 21
This exception was originally thrown at this call stack:
System.Security.Permissions.FileIOPermission.EmulateFileIOPermissionChecks(string)
System.IO.FileStream.Init(string, System.IO.FileMode, System.IO.FileAccess, int, bool, System.IO.FileShare, int, System.IO.FileOptions, Microsoft.Win32.Win32Native.SECURITY_ATTRIBUTES, string, bool, bool, bool)
System.IO.FileStream.FileStream(string, System.IO.FileMode, System.IO.FileAccess)
EntryLog.Handlers.StreamEntryLogs.StreamWritter(string, string) in StreamEntryLogs.cs
EntryLog.EntryLog.LogWarning(string) in EntryLog.cs
EntryLogConsoleTest.Program.Main(string[]) in Program.cs

例外来自以下行;

string filePath = System.IO.Path.Combine(EntryLog.LogPath.AbsolutePath, currentTimeFilename + " - " + $"{foldername}.log");

var fileStreamer = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write);
var streamWriter = new StreamWriter(fileStreamer);

日志路径是通过此方法获得的;

LogPath = new Uri(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)); 

我已经尝试了各种调试方式，但它总是在 StreamWriter 上抛出上述异常。请协助我解决这个问题。我正在使用 4.5.2 .net 框架

文件路径

有问题的文件路径是这样的;C:UsersJNyingisourcereposEntryLogConsoleTestEntryLogConsoleTestbinDebug

当前时间和文件夹名称

string currentTimeFilename = DateTime.Now.ToString("yyyy-MM-dd HH:mm");

string foldername = "Log"

Answer 1

问题是文件名中的:

string currentTimeFilename = DateTime.Now.ToString("yyyy-MM-dd HH:mm"); 
^

例如，将其更改为-或_甚至.，错误就会消失

string currentTimeFilename = DateTime.Now.ToString("yyyy-MM-dd HH_mm"); 

Answer 2

使用 ILSpy，您可以发现方法EmulateFileIOPermissionChecks的代码(引发 NotSupportedException(为：

internal static void EmulateFileIOPermissionChecks(string fullPath)
{
if (AppContextSwitches.UseLegacyPathHandling || !PathInternal.IsDevice(fullPath))
{
if (PathInternal.HasWildCardCharacters(fullPath))
{
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPathChars"));
}
if (PathInternal.HasInvalidVolumeSeparator(fullPath))
{
throw new NotSupportedException(Environment.GetResourceString("Argument_PathFormatNotSupported"));
}
}
}

因此，您的路径包含无效字符。

编辑

如果在设置中小时 - 分钟分隔符是冒号(请参阅日期时间格式的字符串(，请考虑"："不能在路径中使用，而是在驱动程序字母之后使用。