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Ta的回复 ://C#调用EasyDL离线SDK HTTP接口 image.Save(stream, ImageFormat.Jpeg); byte[] imgData = new byte[stream.Position]; //初始化字节数组,用来暂存读取到的字节 stream.Position = 0; stream.Read(imgData, 0, imgData.Length); //读取流中数据,写入到字节数组中 stream.Close(); //关闭流 WebClient webClient = new WebClient(); webClient.Headers.Add(HttpRequestHeader.ContentType, "application/json"); byte[] resultData = webClient.UploadData(URI, "post", imgData); string resultText = Encoding.UTF8.GetString(resultData);