/// <summary>
/// Determines whether the file is locked.
/// </summary>
/// <param name="file">The file.</param>
/// <returns>
/// <c>true</c> if [is file locked] [the specified file]; otherwise, <c>false</c>.
/// </returns>
public static bool CheckFileLocked(this FileInfo file)
{
FileStream stream = null;
try
{
stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
catch (IOException)
{
if (!file.CheckExists())
{
throw new FileNotFoundException("File {0} not found".Build(file.FullName), file.FullName);
}
//the file is unavailable because it is:
//still being written to
//or being processed by another thread
//or does not exist (has already been processed)
return(true);
}
finally
{
if (stream != null)
{
stream.Close();
}
}
//file is not locked
return(false);
}
public void ExistsCheckFileInfoTest()
{
var fileName = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData, Environment.SpecialFolderOption.DoNotVerify), "tempfileinfotest.dat");
_ = RandomData.GenerateFile(fileName, 500);
var fileInfo = new FileInfo(fileName);
try
{
fileInfo.CheckExists(true);
}
catch
{
Assert.Fail();
}
FileInfo nullFileInfo = null;
_ = Assert.ThrowsException <NullReferenceException>(() => nullFileInfo.CheckExists(true));
_ = Assert.ThrowsException <FileNotFoundException>(() => new FileInfo("fakefile").CheckExists(true));
}
public static bool FileHasInvalidChars(FileInfo file)
{
return(file.CheckExists() && file.ArgumentNotNull().FullName.IndexOfAny(InvalidFileNameChars.ToArray()) != -1);
}
