public ImageView upload()
{
HttpContextBase context = (HttpContextBase)Request.Properties["MS_HttpContext"];
HttpRequestBase request = context.Request;
byte[] imageBytes = Convert.FromBase64String(request["base64"].ToString().Split(',')[1]);
MemoryStream ms = new System.IO.MemoryStream(imageBytes);
Image image = Image.FromStream(ms);
string date = DateTime.Now.ToString("yyyyMMdd");
string dir = Path.Combine(ConfigurationManager.AppSettings["UploadPath"], date);
string guid = Guid.NewGuid().ToString("N");
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
string filename = guid + ".jpeg";
string path = Path.Combine(dir, filename);
image.Save(path);
ImageResizeOptions imageResizeOptions = new ImageResizeOptions();
if (context.Request["type"] == "touxiang")
{
imageResizeOptions.cut = true;
imageResizeOptions.Width = 200;
imageResizeOptions.Height = 200;
}
else if (context.Request["type"] == "tiyanshi")
{
imageResizeOptions.cut = true;
imageResizeOptions.Width = 600;
imageResizeOptions.Height = 700;
}
else
{
imageResizeOptions.cut = false;
imageResizeOptions.Width = 600;
imageResizeOptions.Height = 0;
}
string src = date + "/" + ImageManager.ResizeImage(path, imageResizeOptions);
ImageView imageView = new ImageView()
{
src = src,
fileID = request["fileID"],
url = ConfigurationManager.AppSettings["UploadUrl"]
};
return(imageView);
}
/// <summary>
/// Resize style
/// </summary>
/// <param name="name"> Style name </param>
/// <param name="resizeWidth"> Max width (0 for auto) </param>
/// <param name="resizeHeight"> Max height (0 for auto) </param>
/// <param name="resizeMode"> Resize mode </param>
public HasImageStyleAttribute(
string name,
int resizeWidth,
int resizeHeight,
ImageResizeMode resizeMode = ImageResizeMode.PreserveAspectRatio,
Resampler resampler = Resampler.Auto,
int quality = 100) : base(name)
{
var resizeOptions = new ImageResizeOptions
{
Width = resizeWidth,
Height = resizeHeight,
Mode = resizeMode
};
var decodeOptions = new ImageEncodeOptions
{
Quality = quality
};
Style = new ImageStyle(name, resizeOptions, decodeOptions);
}
private ResizeOptions ToResizeOptions(Image <Rgba32> image, ImageResizeOptions resizeOptions)
{
ResizeMode mode;
switch (resizeOptions.Mode)
{
case ImageResizeMode.PreserveAspectRatio: mode = ResizeMode.Max; break;
case ImageResizeMode.IgnoreAspectRatio: mode = ResizeMode.Stretch; break;
case ImageResizeMode.ShrinkLarger: mode = ResizeMode.Min; break;
case ImageResizeMode.Fill: mode = ResizeMode.Min; break;
default: throw new NotImplementedException();
}
var resizeOptionsResult = new ResizeOptions
{
Size = new Size(resizeOptions.Width, resizeOptions.Height),
Mode = mode
};
switch (resizeOptions.Resampler)
{
// https://www.imagemagick.org/discourse-server/viewtopic.php?t=15742
case Resampler.Auto:
{
if (image.Width < resizeOptions.Width)
{
resizeOptionsResult.Sampler = new MitchellNetravaliResampler();
break;
}
// TODO split
resizeOptionsResult.Sampler = new Lanczos2Resampler();
break;
}
case Resampler.Bicubic:
resizeOptionsResult.Sampler = new BicubicResampler();
break;
case Resampler.Box:
resizeOptionsResult.Sampler = new BoxResampler();
break;
case Resampler.CatmullRom:
resizeOptionsResult.Sampler = new CatmullRomResampler();
break;
case Resampler.Hermite:
resizeOptionsResult.Sampler = new HermiteResampler();
break;
case Resampler.MitchellNetravali:
resizeOptionsResult.Sampler = new MitchellNetravaliResampler();
break;
case Resampler.NearestNeighbor:
resizeOptionsResult.Sampler = new NearestNeighborResampler();
break;
case Resampler.Robidoux:
resizeOptionsResult.Sampler = new RobidouxResampler();
break;
case Resampler.RobidouxSharp:
resizeOptionsResult.Sampler = new RobidouxSharpResampler();
break;
case Resampler.Spline:
resizeOptionsResult.Sampler = new SplineResampler();
break;
case Resampler.Lanczos2:
resizeOptionsResult.Sampler = new Lanczos2Resampler();
break;
case Resampler.Lanczos3:
resizeOptionsResult.Sampler = new Lanczos3Resampler();
break;
case Resampler.Lanczos5:
resizeOptionsResult.Sampler = new Lanczos5Resampler();
break;
case Resampler.Lanczos8:
resizeOptionsResult.Sampler = new Lanczos8Resampler();
break;
case Resampler.Triangle:
resizeOptionsResult.Sampler = new TriangleResampler();
break;
case Resampler.Welch:
resizeOptionsResult.Sampler = new WelchResampler();
break;
default:
throw new NotImplementedException($"'{resizeOptions.Resampler}' Resampler is not implemented");
}
return(resizeOptionsResult);
}
public override void Process()
{
byte[] uploadFileBytes = null;
string uploadFileName = null;
if (UploadConfig.Base64)
{
uploadFileName = UploadConfig.Base64Filename;
uploadFileBytes = Convert.FromBase64String(Request[UploadConfig.UploadFieldName]);
}
else
{
var file = Request.Files[UploadConfig.UploadFieldName];
uploadFileName = file.FileName;
if (!CheckFileType(uploadFileName))
{
Result.State = UploadState.TypeNotAllow;
WriteResult();
return;
}
if (!CheckFileSize(file.ContentLength))
{
Result.State = UploadState.SizeLimitExceed;
WriteResult();
return;
}
uploadFileBytes = new byte[file.ContentLength];
try
{
file.InputStream.Read(uploadFileBytes, 0, file.ContentLength);
}
catch (Exception)
{
Result.State = UploadState.NetworkError;
WriteResult();
}
}
Result.OriginFileName = uploadFileName;
var savePath = PathFormatter.Format(uploadFileName, UploadConfig.PathFormat);
var localPath = Server.MapPath(savePath);
string date = DateTime.Now.ToString("yyyyMMdd");
string dir = Path.Combine(ConfigurationManager.AppSettings["UploadPath"], date);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
localPath = Path.Combine(dir, uploadFileName);
try
{
if (!Directory.Exists(Path.GetDirectoryName(localPath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(localPath));
}
File.WriteAllBytes(localPath, uploadFileBytes);
if (Request["action"] == "uploadimage")
{
ImageResizeOptions imageResizeOptions = new ImageResizeOptions();
imageResizeOptions.cut = false;
imageResizeOptions.Width = 640;
imageResizeOptions.Height = 0;
Result.Url = ConfigurationManager.AppSettings["UploadUrl"] + "/" + date + "/" + ImageManager.ResizeImage(localPath, imageResizeOptions);
Result.State = UploadState.Success;
}
else
{
Result.Url = ConfigurationManager.AppSettings["UploadUrl"] + date + "/" + uploadFileName;
Result.State = UploadState.Success;
}
}
catch (Exception e)
{
Result.State = UploadState.FileAccessError;
Result.ErrorMessage = e.Message;
}
finally
{
WriteResult();
}
}
