參考資料：ASP.NET 上傳檔案到共享檔案夾

創建共享檔案夾參考資料：https://www.cnblogs.com/dansediao/p/5712657.html

一、配置上傳檔案相關引數并讀取引數

1.配置appsettings.json　　　　

{
    "FileUploadInfo": {
    "UploadPath": "\\\\172.21.0.10\\File",
    "DownloadPath": "http://213.10.11.126:8001/",
    "UserName": "ShareUser",
    "Password": "Password"
    }  
}

2.讀取配置資料

2.1 新建物體類　　

    /// <summary>
    /// 檔案上傳配置項
    /// </summary>
    public class FileUploadConst
    {
        /// <summary>
        /// 上傳地址
        /// </summary>
        public string UploadPath { get; set; }

        /// <summary>
        /// 檔案訪問/下載地址
        /// </summary>
        public string DownloadPath { get; set; }

        /// <summary>
        /// 訪問共享目錄用戶名
        /// </summary>
        public string UserName { get; set; }

        /// <summary>
        /// 訪問共享目錄密碼
        /// </summary>
        public string Password { get; set; }
    }

2.2  映射物體類與配置項

在startup.cs中配置　　　　

                public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<FileUploadConst>(Configuration.GetSection("FileUploadInfo"));
        }

3.控制器中讀取配置項，通過注入的方式

        public FileUploadConst FileUploadConfig { get; set; }
        public UploadController(IOptions<FileUploadConst> option)
        {
            FileUploadConfig = option.Value;
        }

二、上傳檔案

　　上傳檔案之前記得初始化構造方法，注入檔案上傳配置項！！！！！↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

1.連接檔案服務器方法 

        /// <summary>
        /// 連接遠程共享檔案夾
        /// </summary>
        /// <param name="path">遠程共享檔案夾的路徑</param>
        /// <param name="userName">用戶名</param>
        /// <param name="passWord">密碼</param>
        private static bool connectState(string path, string userName, string passWord)
        {
            var flag = false;
            var proc = new Process();
            try
            {
                proc.StartInfo.FileName = "cmd.exe";
                proc.StartInfo.UseShellExecute = false;
                proc.StartInfo.RedirectStandardInput = true;
                proc.StartInfo.RedirectStandardOutput = true;
                proc.StartInfo.RedirectStandardError = true;
                proc.StartInfo.CreateNoWindow = true;
                proc.Start();
                var dosLine = "net use " + path + " " + passWord + " /user:" + userName;
                proc.StandardInput.WriteLine(dosLine);
                proc.StandardInput.WriteLine("exit");
                while (!proc.HasExited)
                {
                    proc.WaitForExit(1000);
                }

                var errormsg = proc.StandardError.ReadToEnd();
                proc.StandardError.Close();if (string.IsNullOrEmpty(errormsg))
                {
                    flag = true;
                }
                else
                {
                    throw new Exception(errormsg);
                }
            }
            catch (Exception ex)
            {
                WriteHelper.WriteFile(ex);
                throw ex;
            }
            finally
            {
                proc.Close();
                proc.Dispose();
            }

            return flag;
        } 

2.傳輸檔案流到服務器中

        /// <summary>
        /// 向遠程檔案夾保存本地內容，或者從遠程檔案夾下載檔案到本地
        /// </summary>
        /// <param name="inFileStream">要保存的檔案的路徑，如果保存檔案到共享檔案夾，這個路徑就是本地檔案路徑如：@"D:\1.avi"</param>
        /// <param name="dst">保存檔案的路徑，不含名稱及擴展名</param>
        /// <param name="fileName">保存檔案的名稱以及擴展名</param>
        private static void Transport(Stream inFileStream, string dst, string fileName)
        {if (!Directory.Exists(dst))
            {
                Directory.CreateDirectory(dst);
            }

            dst = dst + fileName;

            if (!System.IO.File.Exists(dst))
            {var outFileStream = new FileStream(dst, FileMode.Create, FileAccess.Write);

                var buf = new byte[inFileStream.Length];

                int byteCount;

                while ((byteCount = inFileStream.Read(buf, 0, buf.Length)) > 0)
                {
                    outFileStream.Write(buf, 0, byteCount);
                }
                inFileStream.Flush();

                inFileStream.Close();

                outFileStream.Flush();

                outFileStream.Close();
            }
        }

3.接收檔案并上傳到檔案服務器

        /// <summary>
        /// 上傳附件到檔案服務器中
        /// </summary>
        [HttpPost, Route("api/Upload/UploadAttachment")]
        [AllowAnonymous]
        public ServiceResponse<UploadRespModel> UploadAttachment()
        {
            var viewModel = new UploadRespModel();
            var code = 200;
            var msg = "上傳失敗!";

            var path = FileUploadConfig.UploadPath; //@"\\172.16.10.130\Resource";
            var s = connectState(path, FileUploadConfig.UserName, FileUploadConfig.Password);
            try
            {
                if (s)
                {
                    var filelist = HttpContext.Request.Form.Files;
                    if (filelist.Count > 0)
                    {
                        var file = filelist[0];
                        var fileName = file.FileName;
                        var blobName = FileHelper.GetSaveFolder(fileName);
                        path = $@"{path}\{blobName}\";

                        fileName = $"{DateTime.Now:yyyyMMddHHmmss}{fileName}";

                        //共享檔案夾的目錄
                        var theFolder = new DirectoryInfo(path);
                        var remotePath = theFolder.ToString();
                        Transport(file.OpenReadStream(), remotePath, fileName);

                        viewModel.SaveUrl = $"{blobName}/{fileName}";
                        viewModel.DownloadUrl = GetFileFullPath(viewModel.SaveUrl);

                        msg = "上傳成功";
                    }
                }
                else
                {
                    code = CommonConst.Code_OprateError;
                    msg = "鏈接服務器失敗";
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
                msg = e.Message;
            }

            return ServiceResponse<UploadRespModel>.SuccessResponse(msg, viewModel, code);
        }

 4.圖片地址拼接方法

        /// <summary>
        /// 拼接檔案全路徑
        /// </summary>
        /// <param name="filePath">檔案相對地址</param>
        private string GetFileFullPath(string filePath)
        {
            var str = string.Empty;
            if (!string.IsNullOrEmpty(filePath))
            {
                // 兼容舊資料
                if (filePath.Contains("http://") || filePath.Contains("https://"))
                {
                    str = filePath;
                }
                else
                {
                    var host = FileUploadConfig.DownloadPath;
                    str = $"{host}/{filePath}";
                }
            }
            return str;
        }

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