大家好,我正在研究 webapi,我需要优化文件夹中的图像, Uploaded images into one folder
然后再上传到destination folder
我需要减少image size in KB
总图像的数量,我正在优化一个single image in to 3 different sizes' (large, thumbnail,medium)' but image sizes are increased
并保存在一个文件夹中,现在我需要优化这些图像,你可以请帮助我,我该怎么做。实际上我是 webapi 的新手。任何人都可能有任何想法,请帮助我,但我需要做一件事,this manually
谢谢你
这是我的控制器
public Task<HttpResponseMessage> Post()
{
if (!Request.Content.IsMimeMultipartContent("form-data"))
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
var uploadFolder = HostingEnvironment.MapPath("~/App_Sprites/UploadFolder");
uploadFolder = Path.Combine(uploadFolder, DateTime.Now.ToString("yyyyMMddhhmmssfff"));
Directory.CreateDirectory(uploadFolder);
var streamProvider = new PreserveFilenameMultipartFileStreamProvider(uploadFolder);
return Request.Content.ReadAsMultipartAsync(streamProvider).ContinueWith(t =>
{
foreach (var uploadedFile in Directory.GetFiles(uploadFolder))
{
var thumbnail = Path.Combine(uploadFolder, "thumb-" + Path.GetFileName(uploadedFile));
var medium = Path.Combine(uploadFolder, "medium-" + Path.GetFileName(uploadedFile));
var large = Path.Combine(uploadFolder, "large-" + Path.GetFileName(uploadedFile));
ImageTools.Resize(uploadedFile, thumbnail, 80, 80);
ImageTools.Resize(uploadedFile, medium, 48, 48);
ImageTools.Resize(uploadedFile, large, 128, 128);
}
return Request.CreateResponse(HttpStatusCode.Accepted);
});
}
}
abd 这是我的课程文件
public class ImageTools
{
public static void Resize(string original, string output, int width, int height)
{
using (var image = Image.FromFile(original))
using (var thumbnail = new Bitmap(width, height))
using (var graphics = Graphics.FromImage(thumbnail))
{
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.DrawImage(image, 0, 0, width, height);
ImageCodecInfo[] info = ImageCodecInfo.GetImageEncoders();
EncoderParameters encoderParameters;
encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 100L);
thumbnail.Save(output, info[1], encoderParameters);
}
}
}
类文件
public class PreserveFilenameMultipartFileStreamProvider : MultipartFileStreamProvider
{
public PreserveFilenameMultipartFileStreamProvider(string rootPath)
: base(rootPath)
{
}
public override string GetLocalFileName(HttpContentHeaders headers)
{
return headers.ContentDisposition.FileName.Replace("\"", "");
}
}
这是我的布局页面
@using (Html.BeginRouteForm("DefaultApi", new { httproute = "", controller = "Upload" }, FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="image" multiple="multiple" accept="image/*" />
<button type="submit">Upload</button>
}
我创建了一个文件夹,现在图像保存在文件夹中,但文件大小以 kb 为单位增加,但我们需要减少,请帮助我