MVC.Net：压缩/保存图片缩略图

通常用户上传的图片需要压缩或者生成缩略图。用System.Web.Helpers.WebImage的Resize方法可以很方便的实现这一功能。示例代码如下：

/// <summary>
/// 保存缩略图
/// </summary>
/// <param name="file">用户上传的文件</param>
/// <param name="fileName">想要保存的文件名</param>
/// <param name="uploadPath">上传地址</param>
/// <returns></returns>
private bool SaveThumbFile(HttpPostedFileBase file, string fileName, string uploadPath, int postId)
{
  try
  {
      var thumbImage = new WebImage(file.InputStream);
      thumbImage.Resize(80, 80);
      var thumbPath = Path.Combine(Server.MapPath("~/Content/uploads/Images/Thumb"),
          fileName);
      thumbImage.Save(thumbPath);
      return true;
  }
  catch
  {
      return false;
  }
}