public bool DeleteFile(string fileName)
{
var filePath = GetFilePath(fileName);
const int max = 10;
int attempt = 1;
while (true)
{
try
{
if (!File.Exists(filePath))
{
return(false);
}
File.SetAttributes(filePath, FileAttributes.Normal);
File.Delete(filePath);
return(true);
}
catch (IOException e)
{
if (attempt >= max)
{
var lockProcesses = FileLockerUtil.WhoIsLockingSafe(filePath, out _);
if (lockProcesses != null)
{
throw new Exception($"Can't delete the '{filePath}' file. It is locked by the process '{string.Join(", ", lockProcesses.Select(p => $"[{p.Id}]{p.ProcessName}"))}'", e);
}
throw;
}
}
catch (UnauthorizedAccessException e)
{
if (attempt >= max)
{
var lockProcesses = FileLockerUtil.WhoIsLockingSafe(filePath, out _);
if (lockProcesses != null)
{
throw new Exception($"Can't delete the '{filePath}' file. It is locked by the process '{string.Join(", ", lockProcesses.Select(p => $"[{p.Id}]{p.ProcessName}"))}'", e);
}
throw;
}
}
catch (Exception)
{
if (attempt >= max)
{
throw;
}
}
attempt++;
Thread.Sleep(attempt * 100);
}
}
public async Task <string> ReadStringAsync(string fileName)
{
var filePath = GetFilePath(fileName);
var fileInfo = new FileInfo(filePath);
if (!fileInfo.Exists)
{
return(null);
}
const int max = 10;
int attempt = 1;
while (true)
{
try
{
using (var fileStream = fileInfo.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (var fileReader = new StreamReader(fileStream))
{
return(await fileReader.ReadToEndAsync());
}
}
catch (IOException e)
{
if (attempt >= max)
{
var lockProcesses = FileLockerUtil.WhoIsLockingSafe(filePath, out _);
if (lockProcesses != null)
{
throw new Exception($"Can't read the '{filePath}' file. It is locked by the process '{string.Join(", ", lockProcesses.Select(p => $"[{p.Id}]{p.ProcessName}"))}'", e);
}
throw;
}
}
catch (UnauthorizedAccessException e)
{
if (attempt >= max)
{
var lockProcesses = FileLockerUtil.WhoIsLockingSafe(filePath, out _);
if (lockProcesses != null)
{
throw new Exception($"Can't read the '{filePath}' file. It is locked by the process '{string.Join(", ", lockProcesses.Select(p => $"[{p.Id}]{p.ProcessName}"))}'", e);
}
throw;
}
}
catch (Exception)
{
if (attempt >= max)
{
throw;
}
}
attempt++;
await Task.Delay(attempt * 100);
}
}