public static string ReadStringFromFile(string filePath)
{
IntPtr hStream = UnsafeNativeApis.CreateFileFromApp(filePath,
GENERIC_READ,
0,
IntPtr.Zero,
OPEN_EXISTING,
(uint)File_Attributes.BackupSemantics,
IntPtr.Zero);
if (hStream.ToInt64() == -1)
{
return(null);
}
byte[] buffer = new byte[4096];
int dwBytesRead;
string str = null;
unsafe
{
fixed(byte *pBuffer = buffer)
{
UnsafeNativeApis.ReadFile(hStream, pBuffer, 4096 - 1, &dwBytesRead, IntPtr.Zero);
}
}
using (StreamReader reader = new StreamReader(new MemoryStream(buffer, 0, dwBytesRead), true))
{
str = reader.ReadToEnd();
}
UnsafeNativeApis.CloseHandle(hStream);
return(str);
}
public static bool WriteStringToFile(string filePath, string str)
{
IntPtr hStream = UnsafeNativeApis.CreateFileFromApp(filePath,
GENERIC_WRITE,
0,
IntPtr.Zero,
CREATE_ALWAYS,
(uint)File_Attributes.BackupSemantics, IntPtr.Zero);
if (hStream.ToInt64() == -1)
{
return(false);
}
byte[] buffer = Encoding.UTF8.GetBytes(str);
int dwBytesWritten;
unsafe
{
fixed(byte *pBuffer = buffer)
{
UnsafeNativeApis.WriteFile(hStream, pBuffer, buffer.Length, &dwBytesWritten, IntPtr.Zero);
}
}
UnsafeNativeApis.CloseHandle(hStream);
return(true);
}