技術標籤：C#Springwinformspringboot上傳附件

桌面前端

參考介面

瀏覽按鈕參考程式碼：

private void btnBrower_Click(object sender, EventArgs e)
        {
            //建立檔案彈出選擇視窗（包括檔名）物件
            OpenFileDialog ofd = new OpenFileDialog();
            //判斷選擇的路徑
            if (ofd.ShowDialog() == DialogResult.OK)
            {
 

                this.txtFilePath.Text = ofd.FileName.ToString();
            }
            filePath = this.txtFilePath.Text;
        }

上傳檔案參考程式碼：

string filePath = "";
private void btnUpload_Click(object sender, EventArgs e)
        {
            string address = "http://localhost:8080"
 
;
            string[] files = { filePath };
            uploadFiles(address, files);
        }

public static string uploadFiles(string url, string[] files)
        {

            Console.WriteLine(files.Length);

            // 設定引數
            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
 

            CookieContainer cookieContainer = new CookieContainer();
            request.CookieContainer = cookieContainer;
            request.AllowAutoRedirect = true;
            request.Method = "POST";
            string boundary = DateTime.Now.Ticks.ToString("X"); // 隨機分隔線
            request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
            const string filePartHeaderTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" +
                      "Content-Type: application/octet-stream\r\n\r\n";
            //string boundary = "kenny";          // 邊界符
            byte[] beginBoundaryBytes = Encoding.UTF8.GetBytes("--" + boundary + "\r\n");  // 邊界符開始。【☆】右側必須要有 \r\n 。
            byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n"); // 邊界符結束。【☆】兩側必須要有 --\r\n 。
            byte[] newLineBytes = Encoding.UTF8.GetBytes("\r\n"); //換一行
            MemoryStream memoryStream = new MemoryStream();
            List<string> lstFiles = new List<string>();
            foreach (string fileFullName in files)
            {
                if (File.Exists(fileFullName))
                {
                    lstFiles.Add(fileFullName);
                }
            }

            int i = 0;
            foreach (var fileFullName in lstFiles)
            {
                FileInfo fileInfo = new FileInfo(fileFullName);
                string fileName = fileInfo.Name;
                fileName = DateTime.Now.ToString("yyyyMMddHHmmss") +"-"+ fileName;

                string fileHeaderItem = string.Format(filePartHeaderTemplate, "file", fileName);
                byte[] fileHeaderItemBytes = Encoding.UTF8.GetBytes(fileHeaderItem);

                if (i > 0)
                {
                    // 第一筆及第一筆之後的資料項之間要增加一個換行 
                    memoryStream.Write(newLineBytes, 0, newLineBytes.Length);
                }
                memoryStream.Write(beginBoundaryBytes, 0, beginBoundaryBytes.Length);  // 2.1 寫入FormData項的開始邊界符
                memoryStream.Write(fileHeaderItemBytes, 0, fileHeaderItemBytes.Length); // 2.2 將檔案頭寫入FormData項中

                int bytesRead;
                byte[] buffer = new byte[1024];

                FileStream fileStream = new FileStream(fileFullName, FileMode.Open, FileAccess.Read);
                while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                {
                    memoryStream.Write(buffer, 0, bytesRead);        // 2.3 將檔案流寫入FormData項中
                }
                i++;
            }

            memoryStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);    // 2.4 寫入FormData的結束邊界符

            request.ContentLength = memoryStream.Length;
            Stream requestStream = request.GetRequestStream();
            memoryStream.Position = 0;
            byte[] tempBuffer = new byte[memoryStream.Length];
            memoryStream.Read(tempBuffer, 0, tempBuffer.Length);
            memoryStream.Close();
            requestStream.Write(tempBuffer, 0, tempBuffer.Length);  // 將記憶體流中的位元組寫入 httpWebRequest 的請求流中
            requestStream.Close();

            //Console.WriteLine("111");
            //傳送請求並獲取相應迴應資料
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
            //直到request.GetResponse()程式才開始向目標網頁傳送Post請求
            Stream instream = response.GetResponseStream();
            StreamReader sr = new StreamReader(instream, Encoding.UTF8);
            //返回結果網頁（html）程式碼
            string content = sr.ReadToEnd();
            string statusCode = response.StatusCode.ToString();
            return statusCode;
        }

後端

使用springboot官方例項
見：
https://spring.io/guides/gs/uploading-files/

https://github.com/spring-guides/gs-uploading-files

附：

可參考：
c# 批量上傳檔案，後臺使用springboot MultipartFile接收：
https://blog.csdn.net/yongjiutongmi53151/article/details/100160994

前後端全用C#,可參考：
客戶端(Winform窗體）上傳檔案到伺服器（web窗體）簡單例子：
https://www.cnblogs.com/xielong/p/5711000.html