static BaseFile GetFile(string filePath, string fileName)
{
BaseFile bf = null;
string strExtension = Path.GetExtension(fileName);//3.txt
switch (strExtension)
{
case ".txt":
bf = new TxtFile(filePath, fileName);
break;
case ".avi":
bf = new AviFile(filePath, fileName);
break;
case ".mp4":
bf = new MP4File(filePath, fileName);
break;
case ".png":
bf = new PngFile(filePath, fileName);
break;
}
return(bf);
}
static BaseFile OpenFile(string filePath, string fileName)
{
BaseFile bf = null;
string extension = Path.GetExtension(fileName);
switch (extension)
{
case ".txt":
bf = new TxtFile(filePath, fileName);
break;
case ".mp4":
bf = new Mp4File(filePath, fileName);
break;
case ".avi":
bf = new AviFile(filePath, fileName);
break;
}
return(bf);
}