图片 音频 视频上传

上传文件使用ashx来处理，该部分代码可以处理任何上传的文件保存到制定文件夹

int LocationID = 0;//图片关联外键

        string description = null;//图片描述

        int success = 1;

        public void ProcessRequest(HttpContext context)

        {



            context.Response.ContentType = "text/plain";

            context.Response.Charset = "UTF-8";

            HttpFileCollection uploadedFiles = context.Request.Files;



            Loger.Debug("用户进入接口");

            try

            {

                if (context.Request["locationid"] != null)

                {

                    LocationID = Convert.ToInt32(context.Request["locationid"]);

                }

                if (context.Request["description"] != null)

                {

                    description = Convert.ToString(context.Request["description"]);

                }

                Loger.Debug(string.Format("用户上传参数:LocationID :{0},description :{1}", LocationID, description));

                for (int j = 0; j < uploadedFiles.Count; j++)

                {

                    HttpPostedFile F1 = uploadedFiles[j];



                    Loger.Debug(string.Format("用户上传附件数量:{0}", F1.ContentLength));

                    if (uploadedFiles[j] != null && F1.ContentLength > 0)

                    {

                        string filepath = DateTime.Now.ToString("yyyyMMdd");

                        //是服务器绝对路径 列如C:\Inetpub\wwwroot\DamangeWebService

                        string path = ConfigurationSettings.AppSettings["Img"].ToString() + "/" + filepath + "/";

                        Loger.Debug(string.Format("图片上传路径是:{0}", path));



                        CommonFunc.FolderCreate(path);



                        for (int i = 0; i < uploadedFiles.Count; i++)

                        {

                            HttpPostedFile F = uploadedFiles[i];



                            if (uploadedFiles[i] != null && F.ContentLength > 0)

                            {

                                //得到上传文件的长度

                                int upFileLength = F.ContentLength;

                                //Loger.Debug("upFileLength==>" + upFileLength);

                                //得到上传文件的客户端MIME类型

                                string contentType = F.ContentType;

                                byte[] FileArray = new Byte[upFileLength];

                                Stream fileStream = F.InputStream;

                                fileStream.Read(FileArray, 0, upFileLength);

                                int index = F.FileName.LastIndexOf('.');

                                string filename = F.FileName.Replace(F.FileName.Substring(0, index), Guid.NewGuid().ToString());



                                string pathUrl = path + filename;

                                F.SaveAs(pathUrl);

                                Loger.Debug(string.Format("图片最终保存路径是:{0}", pathUrl));

                              

                                success = SaveimageToBase(F.ContentLength, pathUrl, F.InputStream);

                            }

                        }



                    }

                }

            }

            catch (Exception ex)

            {

                success = 0;

                Loger.Debug(string.Format("异常原因:{0}", ex.ToString()));

            }

            finally

            {

                HttpContext.Current.ApplicationInstance.CompleteRequest();

                Loger.Debug("success状态===》" + success);

                context.Response.Write(success);

                context.Response.Flush();

                context.Response.End();

            }

View Code

由于上传的是图片，直接保存 到文件夹里面。当然也可以顺便把压缩过的图片保存到数据库
中

 /// <summary>

        /// 保存图片到数据库

        /// </summary>

        /// <param name="length">图片大小</param>

        /// <param name="fileName">名称</param>

        /// <param name="stream">图片文件流</param>

        /// <returns></returns>

        private int SaveimageToBase(double length, string fileName, Stream stream)

        {



            int success = 1;

            System.Drawing.Image original_image = null;

            System.Drawing.Bitmap final_image = null;

            System.Drawing.Graphics graphic = null;

            original_image = System.Drawing.Image.FromStream(stream);

            int width = original_image.Width;

            int height = original_image.Height;

            int target_width = 400;

            int target_height = 300;

            int new_width, new_height;

            try

            {

                float target_ratio = (float)target_width / (float)target_height;

                float image_ratio = (float)width / (float)height;



                if (target_ratio > image_ratio)

                {

                    new_height = target_height;

                    new_width = (int)Math.Floor(image_ratio * (float)target_height);

                }

                else

                {

                    new_height = (int)Math.Floor((float)target_width / image_ratio);

                    new_width = target_width;

                }



                new_width = new_width > target_width ? target_width : new_width;

                new_height = new_height > target_height ? target_height : new_height;



                final_image = new System.Drawing.Bitmap(target_width, target_height);

                graphic = System.Drawing.Graphics.FromImage(final_image);

                graphic.FillRectangle(new System.Drawing.SolidBrush(System.Drawing.Color.Black), new System.Drawing.Rectangle(0, 0, target_width, target_height));

                int paste_x = (target_width - new_width) / 2;

                int paste_y = (target_height - new_height) / 2;

                graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;



                graphic.DrawImage(original_image, paste_x, paste_y, new_width, new_height);

                MemoryStream ms = new MemoryStream();

                final_image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

                // DisasterImageSound 这个是保存图片的对象

                DisasterImageSound Model = new DisasterImageSound();

                Model.Data = ms.GetBuffer();

                Model.LocationID = Convert.ToInt32(LocationID);

                Model.FileSize = length;

                Model.ContentType = fileName;

                Model.Description = description;

                new BLL.DisasterImageSound().Add(Model);

            }

            catch (Exception ex)

            {

                success = 0;

                Loger.Debug(string.Format("SaveimageToBase异常.异常愿意:{0}", ex.ToString()));

            }

            return success;

        }

View Code

 

调用ashx 方法 url可以添加各种参数。同理可以在ashx可以获取到 ，url 是ashx部署的地址，Server.MapPath("TMp/" + filename) 这个是文件

  string url = ConfigurationSettings.AppSettings["ImgUrl"].ToString();

                    System.Net.WebClient myWebClient = new System.Net.WebClient();

                    myWebClient.UploadFile(url, "POST", Server.MapPath("TMp/" + filename));