遍历某一folder下所有的图片

System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(folderpath);
System.IO.FileInfo[] files = dir.GetFiles("*.*", System.IO.SearchOption.AllDirectories);
for(int j=0;j<files.Length;j++)
{
string ext = files[j].Extension.ToLower();
if ((ext.Equals(".jpg") || ext.Equals(".png")) &&
(files[j].Attributes & System.IO.FileAttributes.Hidden) != System.IO.FileAttributes.Hidden)
{
images.Add(new ImageFileInfo(System.IO.Path.GetFileNameWithoutExtension(files[j].Name), files[j].FullName));
}
}