/// <summary>
/// Get Image Info from File.
/// </summary>
/// <param name="localImagePath"></param>
/// <param name="id"></param>
/// <param name="tag"></param>
/// <returns></returns>
public static ImageInfo GetImageInfo(string localImagePath, string id, string tag)
{
if (string.IsNullOrEmpty(id))
{
throw new ArgumentNullException("id");
}
if (string.IsNullOrEmpty(localImagePath))
{
throw new ArgumentNullException("localImagePath");
}
var source = Image.FromFile(localImagePath);
var imgInfo = new ImageInfo();
imgInfo.Id = id;
imgInfo.Width = source.Width;
imgInfo.Height = source.Height;
imgInfo.Extension = ImageUtility.GetImageFormat(source).ToString().ToLower();
imgInfo.Tag = tag;
return(imgInfo);
}
/// <summary>
/// Get Image thumb url from Github
/// if the file not existed I will copy from N2SOURCE/{id}.gif
/// And make thumb file to N2_{w}x{h}/id.gif and return
/// 取得縮圖的網址，如果沒有的話我會從 N2SOURCE/{id}.gif 來製作縮圖
/// 放置 N2_{w}x{h}/id.gif 並且回傳網址
/// </summary>
/// <param name="id">圖片編號</param>
/// <param name="w">寬度 如果0 隨高度換算</param>
/// <param name="h">高度 如果0 隨寬度換算</param>
/// <returns></returns>
public string GetImageThumbFromSource(string id, int w, int h)
{
if (string.IsNullOrEmpty(id))
{
throw new ArgumentNullException("id");
}
RepositoryContent repoContent = GetFileRepositoryContent("N2SOURCE" + "/" + id + ".gif");
if (repoContent == null)
{
return(null);
}
if (w == 0 && h == 0)
{
return(repoContent.DownloadUrl);
}
RepositoryContent repoContentThumb = GetFileRepositoryContent("N2_" + w + "x" + h + "/" + id + ".gif");
if (repoContentThumb != null)
{
return(repoContentThumb.DownloadUrl);
}
//Get Image From Source
var bytes = Convert.FromBase64String(repoContent.EncodedContent);
var sourceImage = Image.FromStream(new MemoryStream(bytes));
var thumbHandler = new ImageUtility();
Image source2 = null;
//按照寬度，高度隨意
if (w > 0 && h == 0)
{
source2 = thumbHandler.MakeThumbnail(sourceImage, w, h, "W");
}
////按照高度，寬度隨意
if (h > 0 && w == 0)
{
source2 = thumbHandler.MakeThumbnail(sourceImage, w, h, "H");
}
////強制任性
if (h > 0 && w > 0)
{
source2 = thumbHandler.MakeThumbnail(sourceImage, w, h, "WH");
}
var memStream = new MemoryStream();
source2.Save(memStream, sourceImage.RawFormat);
UpoloadImage(id, memStream.ToArray(), "upload by N2ImageAgent", "N2_" + w + "x" + h);
sourceImage.Dispose();
source2.Dispose();
return(GetFileRepositoryContent("N2_" + w + "x" + h + "/" + id + ".gif").DownloadUrl);
}