using System;

public class Program

{

​

    public void SendExcelToLineNotify(string filePath, string accessToken)

    {

        using (var httpClient = new HttpClient())

        {

            httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);

​

            using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))

            {

                using (var content = new MultipartFormDataContent())

                {

                    // 將Excel檔案加入MultipartFormDataContent

                    content.Add(new StreamContent(fileStream), "imageFile", Path.GetFileName(filePath));

​

                    // 傳送請求

                    var response = httpClient.PostAsync(LineNotifyApiUrl, content).Result;

​

                    // 可以在這裡處理回應，例如確認是否成功發送訊息

                    var responseContent = response.Content.ReadAsStringAsync().Result;

                    Console.WriteLine(responseContent);

                    MessageBox.Show(responseContent);

                }

            }

        }

    }

}