需求: 点发送邮件按钮的时候, 自动在客户端电脑打开默认邮件的窗口,并且把内容和附件都附加上去.
解决方案: 尝试使用过Microsoft.Office.Interop.Outlook 和 MPAI.dll 都无法实现, 在本地debug的时候是完全没问题的, 但是部署到IIS上后发现 这两个方式都会在服务器上寻找默认的邮件客户端. 显然这个不能实现的。
Mailto :方法可行, 也可以打开默认的邮件客户端,但是无法添加附件。
最后只能在Controller里面生成EML文件
注意: 在这里我曾使用过MomeyStream 直接作为附件, 但是提示文件损坏. 后面没有时间就没有继续研究了,. 目前是保存到服务器的一个文件夹里面.
下面是实现的代码:
Helper:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Net.Mail;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Web.Mvc;
namespace AgilityNorthAsiaPlatform.Code.Helpers
{
public class MailHelper
{
public static void ToEmlStream(System.Net.Mail.MailMessage msg, Stream str, string dummyEmail)
{
using (var client = new SmtpClient())
{
var id = Guid.NewGuid();
var tempFolder = Path.Combine(Path.GetTempPath(), Assembly.GetExecutingAssembly().GetName().Name);
tempFolder = Path.Combine(tempFolder, "MailMessageToEMLTemp");
// create a temp folder to hold just this .eml file so that we can find it easily.
tempFolder = Path.Combine(tempFolder, id.ToString());
if (!Directory.Exists(tempFolder))
{
Directory.CreateDirectory(tempFolder);
}
client.UseDefaultCredentials = true;
client.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory;
client.PickupDirectoryLocation = tempFolder;
client.Send(msg);
// tempFolder should contain 1 eml file
var filePath = Directory.GetFiles(tempFolder).Single();
// create new file and remove all lines that start with 'X-Sender:' or 'From:'
string newFile = Path.Combine(tempFolder, "modified.eml");
using (var sr = new StreamReader(filePath))
{
using (var sw = new StreamWriter(newFile))
{
string line;
while ((line = sr.ReadLine()) != null)
{
if (!line.StartsWith("X-Sender:") &&
!line.StartsWith("From:") &&
// dummy email which is used if receiver address is empty
!line.StartsWith("X-Receiver: " + dummyEmail) &&
// dummy email which is used if receiver address is empty
!line.StartsWith("To: " + dummyEmail))
{
sw.WriteLine(line);
}
}
}
}
// stream out the contents
using (var fs = new FileStream(newFile, FileMode.Open))
{
fs.CopyTo(str);
}
}
}
public static string ReadSignature()
{
string appDataDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\Microsoft\Signatures";
string signature = string.Empty;
DirectoryInfo diInfo = new DirectoryInfo(appDataDir);
if
(diInfo.Exists)
{
FileInfo[] fiSignature = diInfo.GetFiles("*.htm");
if (fiSignature.Length > 0)
{
StreamReader sr = new StreamReader(fiSignature[0].FullName, Encoding.Default);
signature = sr.ReadToEnd();
if (!string.IsNullOrEmpty(signature))
{
string fileName = fiSignature[0].Name.Replace(fiSignature[0].Extension, string.Empty);
signature = signature.Replace(fileName + "_files/", appDataDir + "/" + fileName + "_files/");
}
}
}
return signature;
}
}
}
Controller
public FileStreamResult ModalSendMail()
{
var report = new rpt_CFS_ShipmentReport_1();
report.ajs_Param.Value = (string)LocalViewData["SendMail_Json"];
report.as_Table.Value = "Con_Shp";
report.as_UsrID.Value = User.Identity.Name;
var ReportStream = new MemoryStream();
report.ExportToPdf(ReportStream);
string ls_filename = "Shipment Report" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".pdf";
try
{
report.ExportToPdf(ReportStream);
FileStream fs = null;
fs = new FileStream(Path.Combine(Server.MapPath("~/FileUploads/"), ls_filename), FileMode.CreateNew);
fs.Write(ReportStream.GetBuffer(), 0, ReportStream.GetBuffer().Length);
fs.Flush();
fs.Close();
ReportStream.Flush();
ReportStream.Close();
}
catch (Exception ex)
{
}
string dummyEmail = User.Identity.Name+"@xxx.com";
var mailMessage = new MailMessage();
mailMessage.To.Add(new MailAddress("xxx@xxx.com"));
mailMessage.From = new MailAddress(dummyEmail);
mailMessage.Subject = "Test subject";
mailMessage.IsBodyHtml = true;
mailMessage.Body = "Test body" + MailHelper.ReadSignature();
// mark as draft
mailMessage.Headers.Add("X-Unsent", "1");
// download image and save it as attachment
using (var httpClient = new HttpClient())
{
//download file from HTTP:
//var imageStream = await httpClient.GetStreamAsync(new Uri(Path.Combine(Server.MapPath("~/FileUploads/"), ls_filename)));
//mailMessage.Attachments.Add(new Attachment(HttpContext.Server.MapPath("~/App_Data/Test.docx")));
mailMessage.Attachments.Add(new System.Net.Mail.Attachment(Path.Combine(Server.MapPath("~/FileUploads/"), ls_filename), MediaTypeNames.Application.Pdf));
}
var stream = new MemoryStream();
MailHelper.ToEmlStream(mailMessage, stream, "jahe@agility.com");
stream.Position = 0;
return File(stream, "message/rfc822", "test_email.eml");
}