.NET HttpPost 上传文件图片到服务器

 public class ImageData ???{ ???????public string imageFilePath { get; set; } ???????public string tempFilePath { get; set; } ???}

 ???????ImageData data = new ImageData(); ???????[HttpPost] ???????public ImageData UploadFile() ???????{ ???????????HttpContext context = HttpContext.Current; ???????????if (context.Request.Files.Count == 0)//判断文件是否存在 ???????????????return null; ???????????String outFilePath = context.Server.MapPath("~/ImageFile/"); ???????????string time = System.DateTime.Now.ToFileTimeUtc().ToString() + "/"; ???????????System.IO.Directory.CreateDirectory(outFilePath + time); ???????????string imageFilePath = outFilePath + time + context.Request.Files[0].FileName; ???????????context.Request.Files[0].SaveAs(imageFilePath); ???????????string thumbnailFilePath = outFilePath + time + "temp_" + context.Request.Files[0].FileName; ???????????getImage(imageFilePath, 60, 2, thumbnailFilePath); ???????????data.imageFilePath = "localhost:12380/ImageFile/" + time + context.Request.Files[0].FileName; ???????????data.tempFilePath = "localhost:12380/ImageFile/" + time + "temp_" + context.Request.Files[0].FileName; ???????????return data; ???????} ???????????????/// <summary> ???????/// 生成缩略图 ???????/// </summary> ???????/// <param name="sourceFile">原始图片文件</param> ???????/// <param name="quality">质量压缩比</param> ???????/// <param name="multiple">收缩倍数</param> ???????/// <param name="outputFile">输出文件名</param> ???????/// <returns>成功返回true,失败则返回false</returns> ???????public static bool getImage(String sourceFile, long quality, int multiple, String outputFile) ???????{ ???????????try ???????????{ ???????????????long imageQuality = quality; ???????????????Bitmap sourceImage = new Bitmap(sourceFile); ???????????????ImageCodecInfo myImageCodecInfo = GetEncoderInfo("image/jpeg"); ???????????????System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality; ???????????????EncoderParameters myEncoderParameters = new EncoderParameters(1); ???????????????EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, imageQuality); ???????????????myEncoderParameters.Param[0] = myEncoderParameter; ???????????????float xWidth = sourceImage.Width; ???????????????float yWidth = sourceImage.Height; ???????????????Bitmap newImage = new Bitmap((int)(xWidth / multiple), (int)(yWidth / multiple)); ???????????????Graphics g = Graphics.FromImage(newImage); ???????????????g.DrawImage(sourceImage, 0, 0, xWidth / multiple, yWidth / multiple); ???????????????g.Dispose(); ???????????????newImage.Save(outputFile, myImageCodecInfo, myEncoderParameters); ???????????????return true; ???????????} ???????????catch ???????????{ ???????????????return false; ???????????} ???????} ?????????????????????/// <summary> ???????/// 获取图片编码信息 ???????/// </summary> ???????private static ImageCodecInfo GetEncoderInfo(String mimeType) ???????{ ???????????int j; ???????????ImageCodecInfo[] encoders; ???????????encoders = ImageCodecInfo.GetImageEncoders(); ???????????for (j = 0; j < encoders.Length; ++j) ???????????{ ???????????????if (encoders[j].MimeType == mimeType) ???????????????????return encoders[j]; ???????????} ???????????????????????return null; ???????}