winform实现为web项目上传图片的功能

项目中有个需求：用winform维护web服务器端的数据，其中需要添加图片，且图片上传需要考虑手机端，要将图片压缩后存在另个文件夹下由手机端调用，以此减轻手机端的数据量过大的负担。

实现思路如下：1.用webservice作为winform的数据层对web服务器数据进行维护；2.webservice中添加如下代码由winform调用：

#region---上传图片---
        /// <summary>
        ///
        /// </summary>
        /// <param name="content"></param>
        /// <param name="pathandname"></param>
        /// <returns></returns>
        [WebMethod]
        public int UpLoadFile(byte[] content, string pathandname)
        {
            int result = -2;//-2，未知错误，-1上传失败，1web图片上传成功但手机图片未成功上传，2web和手机图片都上传成功。
            try
            {
                string phonePicturePath = ConfigurationManager.AppSettings["phonePicturePath"];
                int percentage = Convert.ToInt32(ConfigurationManager.AppSettings["percentage"]);
                int index = pathandname.LastIndexOf(".");
                if (index == 0)
                {
                    result = -1;
                }
                else
                {
                    string extended = string.Empty;
                    if (index + 1 == pathandname.Length)
                    {
                        result = -1;
                    }
                    else
                    {
                        extended = pathandname.Substring(index + 1);
                        if (extended == "jpeg" || extended == "gif" || extended == "jpg" || extended == "png")
                        {
                            try
                            {
                                File.WriteAllBytes(Server.MapPath(pathandname), content);//web上传成功
                                result = 1;
                                phonePicturePath += pathandname.Substring(pathandname.LastIndexOf('/'));
                                if (GetPicThumbnail(pathandname, phonePicturePath, percentage))//全部上传成功
                                {
                                    result = 2;
                                }
                            }
                            catch (Exception ex)
                            {
                                result = -1;
                            }

                        }
                        else
                        {
                            result = -1;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                result = -1;
            }
            return result;
        }

        /// <summary>
        /// 压缩图片
        /// </summary>
        /// <param name="sFile">文件路径</param>
        /// <param name="outPath">存放路径</param>
        /// <param name="flag">压缩比率</param>
        /// <returns>Boolean</returns>
        [WebMethod]
        public bool GetPicThumbnail(string sFile, string outPath, int flag)
        {
            System.Drawing.Image iSource = System.Drawing.Image.FromFile(Server.MapPath(sFile));
            ImageFormat tFormat = iSource.RawFormat;

            //以下代码为保存图片时，设置压缩质量
            EncoderParameters ep = new EncoderParameters();
            long[] qy = new long[1];
            qy[0] = flag;//设置压缩的比例1-100
            EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);
            ep.Param[0] = eParam;
            try
            {
                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();
                ImageCodecInfo jpegICIinfo = null;
                for (int x = 0; x < arrayICI.Length; x++)
                {
                    if (arrayICI[x].FormatDescription.Equals("JPEG"))
                    {
                        jpegICIinfo = arrayICI[x];
                        break;
                    }
                }
                if (jpegICIinfo != null)
                {
                    iSource.Save(Server.MapPath(outPath), jpegICIinfo, ep);//dFile是压缩后的新路径
                }
                else
                {
                    iSource.Save(outPath, tFormat);
                }
                return true;
            }
            catch
            {
                return false;
            }
            finally
            {
                iSource.Dispose();
                iSource.Dispose();
            }
        }
        #endregion

3.然后winform端代码如下：

private void btnCommonFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog fileDialog = new OpenFileDialog();
            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                string extension = Path.GetExtension(fileDialog.FileName);
                string[] str = new string[] { ".gif", ".jpeg", ".jpg", "png" };
                if (!str.Contains(extension))
                {
                    MessageBox.Show("仅能上传gif，jpeg，jpg，png格式的图片！");
                }
                else
                {
                    FileInfo fileInfo = new FileInfo(fileDialog.FileName);
                    if (fileInfo.Length > (FILE_SIZE * 1024) * 1024)
                    {
                        MessageBox.Show("上传的图片不能大于5MB");
                    }
                    else
                    {
                        Stream file = fileDialog.OpenFile();
                        byte[] bytes = new byte[file.Length];
                        file.Read(bytes, 0, bytes.Length);
                        DateTime time = DateTime.Now;
                        //重命名图片的名称与路径
                        string path_name = "/images/" + time.ToString("yyyyMMddHHmmss") + extension;
                        if (tb.UploadFile(bytes, path_name, extension) != "-1")
                        {
                            MessageBox.Show("上传功能！");
                            this.txtpicture.Text = path_name;
                        }
                    }
                }
            }
        }

4.至此全部工作做完。