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[英]How to get event of sent email & open, click counts in sendgrid using c#?
[英]Sendgrid C# bulk email X-SMTPAPI header not working
我正在尝试使用 SendGrid 将 email 发送给 ASP.Net C# web 应用程序中的多个收件人
根据 SendGrid 文档,我需要在 JSON 格式的字符串中将 X-SMTPAPI header 添加到我的消息中。 我这样做,首先检查我刚刚添加了一个手写字符串,然后以编程方式构建我的 json email 列表,这是我的代码:
string header = "{\"to\": [\"emailaddress2\",\"emailaddress3\"], \"sub\": { \"%name%\": [\"Ben\",\"Joe\"]},\"filters\": { \"footer\": { \"settings\": { \"enable\": 1,\"text/plain\": \"Thank you for your business\"}}}}";
string header2 = Regex.Replace(header, "(.{72})", "$1" + Environment.NewLine);
var myMessage3 = new SendGridMessage();
myMessage3.From = new MailAddress("emailaddress1", "FromName");
myMessage3.Headers.Add("X-SMTPAPI", header2);
myMessage3.AddTo("emailaddress4");
myMessage3.Subject = "Test subject";
myMessage3.Html = "Test message";
myMessage3.EnableClickTracking(true);
// Create credentials, specifying your user name and password.
var credentials = new NetworkCredential(ConfigurationManager.AppSettings["xxxxx"], ConfigurationManager.AppSettings["xxxxx"]);
// Create an Web transport for sending email.
var transportWeb = new Web(credentials);
// Send the email, which returns an awaitable task.
transportWeb.DeliverAsync(myMessage3);
但它似乎只是忽略了我的 header,并将 email 发送到“addto”中使用的一个 email“emailaddress4”。 根据文档,如果 header JSON 被错误解析,则 SendGrid 会向“发件人”字段中设置的 email 地址发送有关错误的 email,但我没有收到有关任何错误的 email。
有人知道吗?
对于使用最新的 9.x c# 库的我来说,解决这个问题的唯一方法是使用 MailHelper static 函数,如下所示:
var client = new SendGridClient(HttpClient, new SendGridClientOptions { ApiKey = _sendGridApiKey, HttpErrorAsException = true });
SendGridMessage mailMsg;
var recipients = to.Split(',').Select((email) => new EmailAddress(email)).ToList();
if (recipients.Count() > 1)
{
mailMsg = MailHelper.CreateSingleEmailToMultipleRecipients(
new EmailAddress(from),
recipients,
subject,
"",
body);
}
else
{
mailMsg = MailHelper.CreateSingleEmail(
new EmailAddress(from),
recipients.First(),
subject,
"",
body);
}
if (attachment != null)
{
mailMsg.AddAttachment(attachment.Name,
attachment.ContentStream.ToBase64(),
attachment.ContentType.MediaType);
}
var response = await client.SendEmailAsync(mailMsg).ConfigureAwait(false);
if (response.IsSuccessStatusCode)
{
_log.Trace($"'{subject}' email to '{to}' queued");
return true;
}
else {
throw new HttpRequestException($"'{subject}' email to '{to}' not queued");
}
我不确定为什么您的FROM地址不会收到任何错误,但是JSON包含以下缺陷:
TO
。 除此之外,您没有将标头包装为72个字符(请参见文档中的示例 )。
我认为,但是X-SMTPAPI文档讨论了将标头作为JSON传递,API本身希望它作为包含Ienumerable字符串的参数。 因此,工作代码为:
var myMessage3 = new SendGridMessage();
myMessage3.From = new MailAddress("email4@email.com", "Test Sender");
myMessage3.AddTo("email2@email.com");
myMessage3.Subject = "Új klubkártya regisztrálva";
myMessage3.Html = "Teszt üzenet";
myMessage3.EnableClickTracking(true);
/* SMTP API
* ===================================================*/
// Recipients
var addresses = new[]{
"email2@email.com", "email3@email.com"
};
//string check = string.Join(",", addresses);
myMessage3.Header.SetTo(addresses);
// Create credentials, specifying your user name and password.
var credentials = new NetworkCredential(ConfigurationManager.AppSettings["xxxxxxx"], ConfigurationManager.AppSettings["xxxxxxxxx"]);
// Create an Web transport for sending email.
var transportWeb = new Web(credentials);
// Send the email, which returns an awaitable task.
transportWeb.DeliverAsync(myMessage3);
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