如何在.NET应用程序中使用SendGrid V3向多个收件人发送电子邮件 [英] how to send an email using SendGrid V3 to multiple recipients, in a .NET app

问题描述

它发送到一个确定.但不要等于或大于2.我试过用和分隔地址；和to_addr字符串中的空格，但是失败.

It sends to one ok. But not to 2 or more. I've tried separating addresses by , and ; and space in the to_addr string, but failed.

EmailAddress类应针对多种地址使用哪种格式?

What format does class EmailAddress expect for multiple addresses?

    public async sub  send_message( msg_subject, msg_body, from_addr_text, to_addr_text, optional commands = "")
       dim apiKey = Environment.GetEnvironmentVariable("SENDGRID_API_KEY")
       dim client as  new SendGridClient( apiKey, , , "v3",  )

       dim from = new EmailAddress( from_addr_text, "INSTRUMENT")
       dim subject = msg_subject
       if subject = ""
        subject = " "       ' won't send if empty
       End If
       dim to_addr = new EmailAddress( to_addr_text, "INSTRUMENT")
       dim plainTextContent = msg_body
       dim htmlContent = "<strong>" & msg_body & "</strong>"
       dim msg = MailHelper.CreateSingleEmail(from, to_addr, subject, plainTextContent, htmlContent)
       dim response = await client.SendEmailAsync(msg)
       if instr( commands, "SKIP POPUPS")           ' TEST TEXT MSG !!!
            exit sub
       End If
       popup_information( "MESSAGE SENDING", "Sent..." & vbcrlf & vbcrlf & "SUBJECT:  " & vbcrlf &  subject  &   vbcrlf & vbcrlf & "BODY:  " & vbcrlf &  msg_body )
end sub

推荐答案

不确定使用的是哪个SDK版本，但是如果您遵循适用于C#的Sendgrid V3 api SDK，则应该在中找到类似以下的方法MailHelper 类

Not sure which SDK version are you using , but if you follow the Sendgrid V3 api SDK for C# , you should find a method like below in the MailHelper class

public static SendGridMessage CreateSingleEmailToMultipleRecipients(EmailAddress from, List<EmailAddress> tos, string subject,string plainTextContent,string htmlContent)

接受 List< EmailAddress> 的

将电子邮件发送给多个收件人.因此，不要在代码中使用下面的行

which accepts a List<EmailAddress> to send email to multiple recipients. So instead of using the below line in your code

dim msg = MailHelper.CreateSingleEmail(from, to_addr, subject, plainTextContent, htmlContent)

您应使用以下代码

   var to_addr = new List<EmailAddress>();
   to_addr.Add(new EmailAddress( to_addr_text, "INSTRUMENT"));
   to_addr.Add(new EmailAddress( "[e-mail]", "secondperson")); // you can add multiple email in this list 

，然后您可以在下面的代码

and then you can use to_addr in the code below

dim msg = MailHelper.CreateSingleEmailToMultipleRecipients(from, to_addr, subject, plainTextContent, htmlContent)

请以C#示例为例，但同样适用于您的VB.NET代码

Pardon me for the example in C# but the same should be applicable for your VB.NET code

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