SendGridMessage帶附件的電子郵件

Question

我有一個Kendo上傳將文件上傳到Azure blob。我想發送一封附有Kendo上傳文件的附件併發送電子郵件。 這裏是我的嘗試：

System.Web.HttpPostedFileBase doc; 
      string filepath; 
      string uniqueBlobName; 

      public ActionResult UploadRegistry() 
      { 
       doc = Request.Files["Registry"]; 
       var inputstream = doc.InputStream; 
       var filename = doc.FileName; 
       var doctype = doc.ContentType; 
       var storageAccount = CloudStorageAccount.Parse(ConfigurationManager.ConnectionStrings["AzureStorageConnection"].ConnectionString); 
       CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient(); 
       CloudBlobContainer container = blobClient.GetContainerReference("registrynumber"); 
       container.CreateIfNotExists(); 
       var permission = container.GetPermissions(); 
       uniqueBlobName = string.Format("Document/{0}", filename); 
       CloudBlockBlob blob = container.GetBlockBlobReference(uniqueBlobName); 
       blob.Properties.ContentType = doctype; 
       blob.UploadFromStream(inputstream); 
       filepath = blob.Uri.AbsoluteUri; 
       TempData["Document"] = doc.FileName; 
       TempData["Document1"] = filepath; 
       string address ="test.test@test.com"; 

       var credentials = new NetworkCredential("username", "password"); 

       var myMessage = new SendGridMessage(); 

       // Add the message properties. 
       myMessage.From = new MailAddress("test@test.com", "Test"); 

       myMessage.AddAttachment(filepath); 
       myMessage.AddTo(address); 
       myMessage.Subject = "Document"; 
       var transportWeb = new Web(credentials); 


       var x = transportWeb.DeliverAsync(myMessage); 


       return Json(new { success = true }); 

      } 

後來，我得到一個錯誤，該文件路徑是無效的。我能做什麼？

Answer 1

根據您的代碼和說明，我發現您直接使用上傳的路徑（url）作爲AddAttachment參數。

據我所知，SendGridMessage.AddAttachment方法不支持直接發送帶在線資源的郵件。

所以你將面臨的文件路徑是無效的錯誤。細節錯誤就像如下：

此外，我發現你使用流上傳文件到蔚藍的Blob存儲。

SendGridMessage.AddAttachment方法也支持添加流作爲其參數。

所以我建議你可以改變下面的代碼，它會工作得很好。

  myMessage.From = new MailAddress("test@test.com", "Test"); 

      myMessage.AddAttachment(inputstream,doc.FileName); 
      myMessage.AddTo(address); 
      myMessage.Subject = "Document"; 
      var transportWeb = new Web(credentials); 

我的測試代碼是象下面這樣：

注意：我直接讀取文件流作爲參數。

static void ExecuteAsync(Customer customer) 
    { 
     using (Stream s1 = File.OpenRead(@"D:\toekn.txt")) 
     { 
     var storageAccount = CloudStorageAccount.Parse("connectionstring"); 
     CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient(); 
     CloudBlobContainer container = blobClient.GetContainerReference("mycontainer"); 
     container.CreateIfNotExists(); 
     var permission = container.GetPermissions(); 

     CloudBlockBlob blob = container.GetBlockBlobReference("aaaa.txt"); 

     blob.UploadFromStream(s1); 
     string filepath = blob.Uri.AbsoluteUri; 
     var credentials = new NetworkCredential("username", "password"); 
     var myMessage = new SendGridMessage(); 
     string address = "aaaaa@gmail.com"; 

     // Add the message properties. 
     myMessage.From = new MailAddress("bbbbbb@hotmail.com", "Example User"); 
     myMessage.Subject = "Sending with SendGrid is Fun"; 
     myMessage.Text = "and easy to do anywhere, even with C#"; 
     // myMessage.AddAttachment(s1, "11.txt"); 
     myMessage.AddAttachment(filepath); 
     myMessage.AddTo(address); 
     myMessage.Subject = "Document"; 
     var transportWeb = new Web(credentials); 
     transportWeb.DeliverAsync(myMessage).Wait(); 
     }   
    } 

結果：