C# .NET 4.7.2：将 outlook 对象嵌入为电子邮件的附件

Question

我创建了一个代码来构建一个 html 字符串作为电子邮件的正文。但是，我希望这封电子邮件成为我首先创建的一般电子邮件和基本电子邮件的附件。下面的代码实际上有效，但最后，当我打开我的一般电子邮件时，我将辅助电子邮件作为附件，但是当我单击它时，附加的电子邮件是一封空白电子邮件。尽管我创建了 html 主体，但这个结果。 html 字符串在最后一个方法“AddMessageAsAttachment”的末尾消失了。任何帮助将不胜感激...谢谢

using Microsoft.Office.Interop.Outlook;

foreach (var positionlist in result)
{
    string salesEmailAddress = positionlist.Key;

    //Create the general email to the salesman
    Microsoft.Office.Interop.Outlook.Application application = new Microsoft.Office.Interop.Application();
    MailItem generalMail = application.CreateItem(Outlook.OlItemType.olMailItem) as MailItem;
    generalMail.Body = "Hello, Please find your quarterly reports";
    generalMail.Subject = $"Quarterly Report";
    generalMail.To = salesEmailAddress;

    foreach (DataRow row in positionlist)
    {
        MailItem mailToAdd = CreateSecondaryEmail(row, "EN", "P:/My_path/Report_EN.oft", @"P:\Another_path\SecondaryEmailAttachment.pdf");
        Globale.AddMessageAsAttachment(generalMail, mailToAdd);
    }

    private MailItem CreateSecondaryEmail(DataRow row, string lang, string template, string attachement)
    {
        string clientNumber = row["account_nbr"];
        string currency = row["Ccy"];

        html += $@"<html>
                    <div style='font-family: Haboro Contrast Ext Thin;font-size: 15,5'>
                        <p style=''></p><BR>
                        <span style=''>{clientNumber}</span><BR>
                        <span style=''> {currency}</span><BR>            
                    </div>";

        html += "</html>";
        MailItem mailPosition = Globale.CreateItemFromTemplate(html, email, template, factsheet);

        return mailPosition;
    }
}

“CreateItemFromTemplate”实际上是从模板链接辅助电子邮件的正文和将附加的快速 pdf 报告（参数“附件”）：

public static Outlook.MailItem CreateItemFromTemplate(string html, string emailaddress, string template, string attachement = null, string client_number = null)
    {

        Outlook.Application application = new Outlook.Application();
        Outlook.MailItem mail = application.CreateItemFromTemplate(template) as Outlook.MailItem;
        mail.HTMLBody = mail.HTMLBody.Replace("#BODY", html);
        DateTime dt = DateTime.Now;
        string date = $"Data as of  {dt.Day}.{dt.Month}.{dt.Year}";
        mail.HTMLBody = mail.HTMLBody.Replace("#DATE",date);
        mail.Subject = $"Quarterly Report of the client {client_number}";
        mail.To = emailaddress;
        if (attachement != null)
        {
            mail.Attachments.Add(attachement);
        }
        return mail;     
    }

最终，我创建了一个“Global”class，它的方法将检索由上述“CreateItemFromTemplate”方法生成的辅助电子邮件 (mailPosition)，并将其作为附件放入普通电子邮件中.

public static void AddMessageAsAttachment(Outlook.MailItem mailContainer,Outlook.MailItem mailToAttach)
    {
        Outlook.Attachments attachments = null;
        Outlook.Attachment attachment = null;
        try
        {
            attachments = mailContainer.Attachments;
            attachment = attachments.Add(mailToAttach,
               Outlook.OlAttachmentType.olEmbeddeditem, 1, "The attached e-mail");
            mailContainer.Save();
        }
        catch (Exception ex)
        {
            System.Windows.Forms.MessageBox.Show(ex.Message);
        }
        finally
        {
            if (attachment != null) System.Runtime.InteropServices.Marshal.ReleaseComObject(attachment);
            if (attachments != null) System.Runtime.InteropServices.Marshal.ReleaseComObject(attachments);
        }
    }

Answer 1

在对任何新创建的项目进行任何修改之后再附加它们之前，尝试调用 Save 方法。

此外，无需在代码中创建新的 Outlook Application 实例。例如，我在您的 post:

开头注意到以下代码

//Create the general email to the salesman
    Microsoft.Office.Interop.Outlook.Application application = new Microsoft.Office.Interop.Application();
    MailItem generalMail = application.CreateItem(Outlook.OlItemType.olMailItem) as MailItem;
    generalMail.Body = "Hello, Please find your quarterly reports";

在 CreateItemFromTemplate 方法中我看到：

Outlook.Application application = new Outlook.Application();
Outlook.MailItem mail = application.CreateItemFromTemplate(template) as Outlook.MailItem;
mail.HTMLBody = mail.HTMLBody.Replace("#BODY", html);

最后，我建议附加网页而不是创建项目并附加它们。网页可以在Outlook中打开查看。

C# .NET 4.7.2：将 outlook 对象嵌入为电子邮件的附件

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