C#根据byte前两位获取图片扩展名
/// <summary>
/// 根据byte前两位获取图片扩展名
/// </summary>
/// <param name="bytes01"></param>
/// <returns></returns>
public static string GetImageExtensionName(string bytes01)
{
string temp = ".jpg";
switch (bytes01)
{
case "255216":
temp = ".jpg";
break;
case "7173":
temp = ".gif";
break;
case "13780":
temp = ".png";
break;
case "6677":
temp = ".bmp";
break;
case "4949":
temp = ".tiff";
break;
default:
temp = ".jpg";
break;
}
return temp;
}