public static string SafeCopyFile(string sourceFileName, string destFileName, SafeCopyFileOptions options)
{
string str;
switch (options)
{
case SafeCopyFileOptions.PreserveOriginal:
{
if (File.Exists(destFileName))
{
return(null);
}
File.Copy(sourceFileName, destFileName);
return(destFileName);
}
case SafeCopyFileOptions.Overwrite:
{
File.Copy(sourceFileName, destFileName, true);
return(destFileName);
}
case SafeCopyFileOptions.FindBetterName:
{
string directoryName = Path.GetDirectoryName(destFileName);
string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(destFileName);
string extension = Path.GetExtension(destFileName);
using (IEnumerator <string> enumerator = Utility.GenerateFileNames(directoryName, fileNameWithoutExtension, extension).GetEnumerator())
{
while (enumerator.MoveNext())
{
string current = enumerator.Current;
if (File.Exists(current))
{
continue;
}
File.Copy(sourceFileName, current);
str = current;
return(str);
}
return(null);
}
return(str);
}
default:
{
throw new ArgumentException("Invalid enumeration value", "options");
}
}
return(null);
}