C# I';我正试图使用FileStream创建一个文件,但遇到了一个异常为什么?
代码如下:C# I';我正试图使用FileStream创建一个文件,但遇到了一个异常为什么?,c#,winforms,C#,Winforms,代码如下: public OptionsFile(string settings) { if (File.Exists(settings)) { } else { FileStream fs=File.Create(settings); fs.Close(); } path_exe
public OptionsFile(string settings)
{
if (File.Exists(settings))
{
}
else
{
FileStream fs=File.Create(settings);
fs.Close();
}
path_exe = Path.GetDirectoryName(Application.LocalUserAppDataPath);
Options_File = settings;
}
在线:FileStream fs=File.Create(设置)
由于某种原因,它无法创建该文件。
在表格1中,我在构造函数中执行了以下操作:
Options_DB.Get_Video_File();
现在,在Options_DB类中,使用断点执行以下操作:
namespace test
{
static class Options_DB
{
static string settings_dir;
static string settings_file;
static OptionsFile setting_file;
static string path_settings;
static string path_exe;
static string outPutVideoFileDirectory;
static Options_DB()
{
// --- O P E N N I N G S E T T I N G F I L E ;
path_exe = Path.GetDirectoryName(Application.LocalUserAppDataPath);
path_settings = Path.GetDirectoryName(Application.LocalUserAppDataPath);
settings_file = "\\settings.txt";
settings_dir = path_settings + @"\settings";
setting_file = new OptionsFile(settings_dir + settings_file);
public OptionsFile(string settings)
{
if (File.Exists(settings))
{
}
else
{
FileStream fs=File.Create(settings);
fs.Close();
}
path_exe = Path.GetDirectoryName(Application.LocalUserAppDataPath);
Options_File = settings;
}
然后在选项文件中执行以下操作:
namespace test
{
static class Options_DB
{
static string settings_dir;
static string settings_file;
static OptionsFile setting_file;
static string path_settings;
static string path_exe;
static string outPutVideoFileDirectory;
static Options_DB()
{
// --- O P E N N I N G S E T T I N G F I L E ;
path_exe = Path.GetDirectoryName(Application.LocalUserAppDataPath);
path_settings = Path.GetDirectoryName(Application.LocalUserAppDataPath);
settings_file = "\\settings.txt";
settings_dir = path_settings + @"\settings";
setting_file = new OptionsFile(settings_dir + settings_file);
public OptionsFile(string settings)
{
if (File.Exists(settings))
{
}
else
{
FileStream fs=File.Create(settings);
fs.Close();
}
path_exe = Path.GetDirectoryName(Application.LocalUserAppDataPath);
Options_File = settings;
}
我在选项文件中使用了断点,并看到设置包含带有settings.txt文件的用户目录,但由于某些原因,它无法生成以下行:
FileStream fs=File.Create(settings);
它停在Form1的行上:Options_DB.Get_Video_File()
“ScreenVideoRecorder.Options\u DB”的类型初始值设定项引发异常
System.TypeInitializationException was unhandled
HResult=-2146233036
Message=The type initializer for 'ScreenVideoRecorder.Options_DB' threw an exception.
Source=ScreenVideoRecorder
TypeName=ScreenVideoRecorder.Options_DB
StackTrace:
at ScreenVideoRecorder.Options_DB.Get_Video_File()
at ScreenVideoRecorder.Form1..ctor() in d:\C-Sharp\ScreenVideoRecorder\ScreenVideoRecorderWorkingVersion\Form1.cs:line 54
at ScreenVideoRecorder.Program.Main() in d:\C-Sharp\ScreenVideoRecorder\ScreenVideoRecorderWorkingVersion\Program.cs:line 18
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.IO.DirectoryNotFoundException
HResult=-2147024893
Message=Could not find a part of the path 'C:\Users\bout0_000\AppData\Local\ScreenVideoRecorder\ScreenVideoRecorder\settings\settings.txt'.
Source=mscorlib
StackTrace:
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
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, FileShare share, Int32 bufferSize)
at System.IO.File.Create(String path)
at DannyGeneral.OptionsFile..ctor(String settings) in d:\C-Sharp\ScreenVideoRecorder\ScreenVideoRecorderWorkingVersion\OptionsFile.cs:line 73
at ScreenVideoRecorder.Options_DB..cctor() in d:\C-Sharp\ScreenVideoRecorder\ScreenVideoRecorderWorkingVersion\Options_DB.cs:line 29
InnerException:
由于某种原因,在执行断点步骤后,无法创建文件流。
我猜这行有问题:FileStream fs=File.Create(设置)
尝试创建时,设置将继续:
"C:\\Users\\user name\\AppData\\Local\\project dir\\project dir\\settings\\settings.txt"
但是它从来没有创建过它。例外很清楚:路径
“C:\Users\bout0\u 000\AppData\Local\ScreenVideoRecorder\ScreenVideoRecorder\settings\”
不存在
请注意,此路径不同于:
“C:\Users\user name\AppData\Local\project dir\project dir\settings\”
异常状态为:
找不到路径“C:\Users\bout0\u 000\AppData\Local\ScreenVideoRecorder\ScreenVideoRecorder\settings\settings.txt”的一部分
因此,您需要检查该文件或文件夹是否存在,或者您是否具有写入该特定文件夹的权限。如果您阅读了内部异常,您可以看到问题是
设置
目录不存在。您可以通过调用来解决这个问题,这将在指定路径中创建所有不存在的目录和子目录。(如果目录已存在,则不会执行任何操作。)
我还建议将手动路径连接替换为调用
找不到路径“…\ScreenVideoRecorder\ScreenVideoRecorder\settings\settings.txt”的一部分。
是否存在settings
文件夹?除了所有正确答案之外:请不要这样连接路径。因为他想创建那个文件(如果它不存在的话),所以很明显这个文件夹不存在。