/// <summary> Queries if a given file exists. </summary>
/// <param name="filePath"> Full pathname of the file. </param>
/// <param name="zeroByteFileCheck"> (Optional) The zero byte file check. </param>
/// <returns> True if it succeeds, false if it fails. </returns>
public bool FileExists(string filePath, ZeroByteFileOption zeroByteFileCheck = ZeroByteFileOption.DoNotCheck)
{
bool result = false;
if (!String.IsNullOrWhiteSpace(filePath))
{
result = File.Exists(filePath);
if (result && zeroByteFileCheck != ZeroByteFileOption.DoNotCheck)
{
using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
result = (fs.Length > Int32.MaxValue);
if (!result)
{
byte[] fileBytes = {};
if (fs.Length > 0)
{
using (var br = new BinaryReader(fs))
{
fileBytes = br.ReadBytes((int)fs.Length);
}
}
result = (fileBytes.Length > 0);
if (!result)
{
if (zeroByteFileCheck == ZeroByteFileOption.DeleteFile)
{
File.Delete(filePath);
result = true;
}
else
{
result = (zeroByteFileCheck == ZeroByteFileOption.ReturnTrue);
}
}
}
}
}
}
return(result);
}
/// <summary> Queries if a given file exists. </summary>
/// <param name="fileName"> Filename of the file. </param>
/// <param name="appDataSubFolder"> Pathname of the application data sub folder. </param>
/// <param name="zeroByteFileCheck"> (Optional) The zero byte file check. </param>
/// <returns> True if it succeeds, false if it fails. </returns>
public bool FileExists(string fileName, string appDataSubFolder,
ZeroByteFileOption zeroByteFileCheck = ZeroByteFileOption.DoNotCheck)
{
return(FileExists(AppDataFilePath(fileName, appDataSubFolder), zeroByteFileCheck));
}