.NET企业级应用WebService上传下载文件

2018-06-22 07:49:20来源：未知阅读 ()

在建立好一个WebService后会有一个自带的

 [WebMethod]//在待会写的所有方法中都要写这个，便于调试
        public string HelloWorld()
        {
            return "Hello World";
        }

现在可以试一下录入记录

 [WebMethod]
        public UserInfo Login(string userName, string pwd)
        {
            if (userName == "admin" && pwd == "123")
            {
                return new UserInfo() { UserName="admin",Pwd="",Age=50,Remark="我很帅" };
            }
            else
            {
                return null;
            }
        }

在MVC项目中的控制器中调用

//第一步：添加服务引用
        //实例化服务引用：服务对象以SoapClient
        MyWebServiceSoapClient client = new MyWebServiceSoapClient();
        public ActionResult Index()
        {
            string result = client.HelloWorld();
            Response.Write(result);
            return View();
        }

        [WebMethod]
        public UserInfo Login(string userName, string pwd)
        {
            if (userName == "admin" && pwd == "123")
            {
                return new UserInfo() { UserName="admin",Pwd="",Age=50,Remark="我很帅" };
            }
            else
            {
                return null;
            }
        }

然后可以写简单的文件上传下载

public class MyWebService : System.Web.Services.WebService
    {

        [WebMethod]
        public string HelloWorld()
        {
            return "Hello World";
        }
        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="bytes"></param>
        /// <param name="fileName"></param>
        /// <returns></returns>
        [WebMethod]
        public bool FileUpload(byte[] bytes,string fileName)
        {
            try
            {
                //实例化内存对象MemoryStream，将byte数组装入内存对象
                MemoryStream memory = new MemoryStream(bytes);
                //文件保存路径
                string filePath = Server.MapPath("~/Files/" + fileName);
                //实例化文件对象
                FileStream fStream = new FileStream(filePath, FileMode.OpenOrCreate);
                //将内存对象写入文件对象
                memory.WriteTo(fStream);
                //释放对象
                memory.Close();
                memory.Dispose();
                fStream.Close();
                fStream.Dispose();
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }

        [WebMethod]
        public byte[] FileDownLoad(string FileName)
        {
            //加载路径
            string filePath = Server.MapPath("~/Files/" + FileName);
            //实例化文件对象，并读取指定的文件
            FileStream fs = File.OpenRead(filePath);
            int b1;
            //实例化内存对象
            System.IO.MemoryStream tempStream = new System.IO.MemoryStream();
            //循环读取文件并将文件转换为byte[]
            while ((b1 = fs.ReadByte()) != -1)
            {
                tempStream.WriteByte(((byte)b1));
            }
            return tempStream.ToArray();
        }

        [WebMethod]
        public List<FileManager> GetFileList()
        {
            //加载路径
            string filePath = Server.MapPath("~/Files/");
            //实例化DirectoryInfo并加载指定路径
            DirectoryInfo directory = new DirectoryInfo(filePath);
            List<FileManager> result = new List<FileManager>();

            //便利指定路径下的所有文件夹
            foreach (DirectoryInfo item in directory.GetDirectories())
            {
                FileManager temp = new FileManager();
                temp.FileName = item.Name;
                temp.FilePath = item.FullName;
                temp.FileType = 1;
                result.Add(temp);
            }
            //遍历指定路径下的所有文件
            foreach (FileInfo item in directory.GetFiles())
            {
                FileManager temp2 = new FileManager();
                temp2.FileName = item.Name;
                temp2.FilePath = item.FullName;
                temp2.FileType = 2;
                result.Add(temp2);
            }
            return result;
        }
    }

在在MVC项目中的控制器中调用

public ActionResult FileUpload()
        {
            return View();
        }

        [HttpPost]
        public ActionResult FileUpload(HttpPostedFileBase file1)
        {
            Stream fileStream = file1.InputStream;
            byte[] bytes = new byte[fileStream.Length];
            fileStream.Read(bytes, 0, bytes.Length);
            // 设置当前流的位置为流的开始
            fileStream.Seek(0, SeekOrigin.Begin);
            bool result = client.FileUpload(bytes, file1.FileName);
            if (result)
            {
                Response.Write("文件上传成功！");
            }
            else
            {
                Response.Write("文件上传失败！");
            }
            return View();
        }

        public ActionResult FileDownLoad()
        {
            List<FileManager> result = client.GetFileList().ToList();
            StringBuilder sb = new StringBuilder();
            sb.Append("<ul>");
            foreach (var item in result)
            {
                    sb.Append(string.Format("<li><a href='/Home/FileDownLoad/{0}'>{1}</a></li>", item.FilePath, item.FileName));
                    
            }
            sb.Append("</ul>");
            ViewBag.FileList = sb.ToString();
            return View();
        }

        [HttpPost]
        public ActionResult FileDownLoad(FormCollection coll)
        {
            string[] s = { "1", "3" };
            foreach (var item in s)
            {
                byte[] result = client.FileDownLoad(item);
                //输出流的编码
                Response.Charset = "UTF-8";
                Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
                //输出类型为流文件
                Response.ContentType = "application/octet-stream";


                Response.AddHeader("Content-Disposition", "attachment; filename=" + "新建文本文档.txt");
                Response.BinaryWrite(result);
                Response.Flush();
                Response.End();
                
            }
            return new EmptyResult();
        }