Question

我正在开发一个ASP.NET MVC项目。在我的项目中，我需要发送带附件的电子邮件。但是当我发送电子邮件时，电子邮件已成功发送，但不包括附件。

这是我的发送电子邮件方式

public bool Send(string email, string subject, string body, HttpPostedFileBase fileUploader, bool html = true)
{
    try
    {
        string from = AppEmail; //example:- sourabh9303@gmail.com

        using (MailMessage mail = new MailMessage(from, email))
        {

            mail.Subject = subject;

            mail.Body = body;

            if (fileUploader != null && fileUploader.ContentLength>0)
            {

                string fileName = Path.GetFileName(fileUploader.FileName);

                mail.Attachments.Add(new Attachment(fileUploader.InputStream, fileName));
            }

            mail.IsBodyHtml = html;

            SmtpClient smtp = new SmtpClient();

            smtp.Host = "smtp.gmail.com";

            smtp.EnableSsl = true;

            NetworkCredential networkCredential = new NetworkCredential(from, EmailPassword);

            smtp.UseDefaultCredentials = true;

            smtp.Credentials = networkCredential;

            smtp.Port = 587;

            smtp.Send(mail);

            return true;
        }
    }
    catch
    {
        return false;
    }
}

那么为什么不包括附件？如何发送带附件的电子邮件？

Answer 1

<强>命名空间您需要导入以下命名空间

using System.IO;
using System.Net;
using System.Net.Mail;

<强>模型以下是名为EmailModel的Model类，具有以下属性。

public class EmailModel
{
    public string To { get; set; }
    public string Subject { get; set; }
    public string Body { get; set; }
    public HttpPostedFileBase Attachment { get; set; }
    public string Email { get; set; }
    public string Password { get; set; }
}

<强>控制器

public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }


[HttpPost]
public ActionResult Index(EmailModel model)
{
    using (MailMessage mm = new MailMessage(model.Email, model.To))
    {
        mm.Subject = model.Subject;
        mm.Body = model.Body;
        if (model.Attachment.ContentLength > 0)
        {
            string fileName = Path.GetFileName(model.Attachment.FileName);
            mm.Attachments.Add(new Attachment(model.Attachment.InputStream, fileName));
        }
        mm.IsBodyHtml = false;
        using (SmtpClient smtp = new SmtpClient())
        {
            smtp.Host = "smtp.gmail.com";
            smtp.EnableSsl = true;
            NetworkCredential NetworkCred = new NetworkCredential(model.Email, model.Password);
            smtp.UseDefaultCredentials = true;
            smtp.Credentials = NetworkCred;
            smtp.Port = 587;
            smtp.Send(mm);
            ViewBag.Message = "Email sent.";
        }
    }

    return View();
    }
}

查看

@model Send_Email_MVC.Models.EmailModel @{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width"/> <title>Index</title> <style type="text/css"> body { font-family: Arial; font-size: 10pt; } table th, table td { padding: 5px; } </style> </head> <body> <div> @using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" })) { <table border="0" cellpadding="0" cellspacing="0"> <tr> <td style="width: 80px"> To: </td> <td> @Html.TextBoxFor(model => model.To) </td> </tr> <tr> <td> Subject: </td> <td> @Html.TextBoxFor(model => model.Subject) </td> </tr> <tr> <td valign="top"> Body: </td> <td> @Html.TextAreaFor(model => model.Body, new { rows = "3", cols = "20" }) </td> </tr> <tr> <td> File Attachment: </td> <td> @Html.TextBoxFor(model => model.Attachment, new { type = "file" }) </td> </tr> <tr> <td> Gmail Email: </td> <td> @Html.TextBoxFor(model => model.Email) </td> </tr> <tr> <td> Gmail Password: </td> <td> @Html.TextBoxFor(model => model.Password, new { type = "password" }) </td> </tr> <tr> <td></td> <td> <input type="submit" value="Send"/> </td> </tr> </table> <br/> <span style="color:green">@ViewBag.Message</span> } </div> </body> </html>

Answer 2

您可以使用此解决方案：

创建此类

public class Attachment
{
    public string Path { get; set; }
    public string Name { get; set; }
    public string ContentType { get; set; }
}

然后创建此界面

public interface IFileAttachmentService
{
    Attachments Save(HttpPostedFileBase file);
}

然后在这个类上实现接口

public class FileAttachmentService : IFileAttachmentService
{
    private static readonly string _folder = "~/Attachments/";

    public Attachments Save(HttpPostedFileBase file)
    {
        if (file == null)
            return new Attachments();

        var savePath = GenerateUniqueFileName(_folder + Path.GetFileName(file.FileName));

        file.SaveAs(HttpContext.Current.Server.MapPath(savePath));
        return new Attachments
        {
            ContentType = file.ContentType,
            Name = Path.GetFileName(file.FileName),
            Path = savePath
        };
    }

    private string GenerateUniqueFileName(string basedOn)
    {
        if (string.IsNullOrWhiteSpace(basedOn))
            throw new ArgumentNullException("basedOn");

        return (Path.GetDirectoryName(basedOn)
            + "\\"
            + Path.GetFileNameWithoutExtension(basedOn)
            + "."
            + Path.GetRandomFileName()
            + Path.GetExtension(basedOn))
            .Replace('\\', '/');
    }
}

然后创建此方法

public static void SendEmail(string to, string toName, string subject, string body, string attachment)
{
    var fromAddress = new MailAddress("Your Gemail Address", "Sender Project System Name");
    var toAddress = new MailAddress(to, toName);
    var att = new Attachment(HttpContext.Current.Server.MapPath(attachment));
    const string fromPassword = "Your pass";

    var smtp = new SmtpClient
    {
        Host = "smtp.gmail.com",
        Port = 587,
        EnableSsl = true,
        DeliveryMethod = SmtpDeliveryMethod.Network,
        UseDefaultCredentials = false,
        Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
    };
    using (var message = new MailMessage(fromAddress, toAddress)
    {
        Subject = subject,
        Body = body
    })
    {
        message.Attachments.Add(att);
        smtp.Send(message);
    }
}

请小心将附件文件设置为正确的模式，如果您不需要使用附件文件发送重载此方法而不附加参数。

在ASP.NET MVC中发送带附件的电子邮件不起作用

2 个答案: