我正在使用相对路径创建StreamWriter
。但该文件没有出现。要排除故障,我想检查完整路径是我所期望的。因此,如果有一个StreamWriter
实例,我如何获得要写入的文件的完整路径?如何获取StreamWriter的完整路径
string fileName = "relative/path.txt"
StreamWriter sw= new StreamWriter(fileName);
// What is the full path of 'sw'?
我正在使用相对路径创建StreamWriter
。但该文件没有出现。要排除故障,我想检查完整路径是我所期望的。因此,如果有一个StreamWriter
实例,我如何获得要写入的文件的完整路径?如何获取StreamWriter的完整路径
string fileName = "relative/path.txt"
StreamWriter sw= new StreamWriter(fileName);
// What is the full path of 'sw'?
从相对路径得到完整的路径,使用Path.GetFullPath方法。
例如:
string fileName = "relative/path.txt";
string fullPath = Path.GetFullPath(fileName);
可能是目录 '相对' 不存在。可以手动创建它。或以编程方式创建如下
string fileName = @"relative\path.txt";
fileName = Path.GetFullPath(fileName);
Directory.CreateDirectory(Path.GetDirectoryName(fileName));
StreamWriter sw= new StreamWriter(fileName, true);
在我的版本的框架,这似乎工作:(通过调试找到)
string fullPath = ((FileStream)(streamWriter.BaseStream)).Name;
谢谢,这正是我正在寻找的! –
恰恰是适合问题标题的那种答案。你的意思是通过“自省”发现的......? –
var fstream = sw.BaseStream as System.IO.FileStream;
if (fstream != null)
Console.WriteLine(GetAbsolutePathByHandle(fstream.SafeFileHandle));
[DllImport("ntdll.dll", CharSet = CharSet.Auto)]
private static extern int NtQueryObject(SafeFileHandle handle, int objectInformationClass, IntPtr buffer, int StructSize, out int returnLength);
static string GetAbsolutePathByHandle(SafeFileHandle handle)
{
var size = 1024;
var buffer = Marshal.AllocCoTaskMem(size);
try
{
int retSize;
var res = NtQueryObject(handle, 1, buffer, size, out retSize);
if (res == -1073741820)
{
Marshal.FreeCoTaskMem(buffer);
size = retSize;
Marshal.AllocCoTaskMem(size);
res = NtQueryObject(handle, 1, buffer, size, out retSize);
}
if (res != 0)
throw new Exception(res.ToString());
var builder = new StringBuilder();
for (int i = 4 + (Environment.Is64BitProcess ? 12 : 4); i < retSize - 2; i += 2)
{
builder.Append((char)Marshal.ReadInt16(buffer, i));
}
return builder.ToString();
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
}
输出:
\Device\HarddiskVolume2\bla-bla\relative\path.txt
你是否认为当你运行你的应用程序在visual studio里面当前目录是bin/debug还是bin/release? – Steve
@banging done done done – javapowered
@Steve是的我正在寻找bin/debug/release目录中的文件....文件不存在,这就是为什么我想以编程方式获得完整路径的原因。比较我是否正在搜索右侧目录 – javapowered