如何使用 Microsoft Graph 在电子邮件正文中嵌入图像答案

【问题标题】：How to embed Image inline in Email Body using Microsoft Graph如何使用 Microsoft Graph 在电子邮件正文中嵌入图像
【发布时间】：2021-06-01 12:10:34
【问题描述】：

我正在使用函数应用程序触发邮件，使用 MS Graph API，邮件正文文本被正确触发，但在呈现图片中显示的页眉和页脚图像时遇到问题。如何在body层面解决这个问题。

以下是以上图片在 HTML/Blob 文件中的引用

  &lt;img src=cid:Header.jpg&gt;
    &lt;img src=cid:footer.png&gt;
    <ContentIDs>Header.jpg, footer.png</ContentIDs>

用于渲染主体的代码。

             var mailContent = new Message
                {
                    Subject = em.Subject,
                    Body = new ItemBody
                    {
                        ContentType = BodyType.Html,
                        Content = m.Body,
                        ODataType = null
                    },
                    ToRecipients = toEmails,
                    CcRecipients = ccEmails,
                    ODataType = null
                };

编辑：在此更改后，当前在 Function App 中面临错误请求。我正在努力解决这个问题。如果您在以下代码中发现任何差异，请随时发表评论。

            var imagePath = @"<path\Header.jpg>";
            var imageID = "Header.jpg";//file name
            byte[] imageArray = System.IO.File.ReadAllBytes(imagePath);
            var imagePath2 = @"<path\footer.png">;
            var imageID2 = "footer.png";
            byte[] imageArray2 =System.IO.File.ReadAllBytes(imagePath2);

            
            var mContent = new Message
            {
                Subject = t.Subject,//parsing from the template
                Body = new ItemBody
                {
                    ContentType = BodyType.Html,
                    Content = m.Body,
                    ODataType = "#microsoft.graph.fileAttachment"
                },
                ToRecipients = toEmails,
                CcRecipients = ccEmails,
                ODataType = "#microsoft.graph.fileAttachment",
                HasAttachments = true,
                Attachments = new MessageAttachmentsCollectionPage()
                    {
                            new FileAttachment
                        {
                                
                                ContentBytes= imageArray,
                                ContentType = "image/jpeg",
                                ContentId= imageID,
                                IsInline=true,
                                Name = "theHead",
                               
                        },
                            new FileAttachment
                            {
                                
                                ContentBytes= imageArray2,
                                ContentType = "image/png",
                                ContentId= imageID2,
                                IsInline=true,
                                Name = "thefoot",
                            }
                    }
            };

【问题讨论】：

怎么样？您的问题解决了吗？
嗨@StanleyGong 非常感谢您的回答。我从您的参考资料中获取了一些代码，但目前我在 Function App 中遇到了错误的请求。
我不确定这是否是重点，但似乎在代码的第 4 行丢失了 =
抱歉在编辑过程中搞砸了，把它加回来。
我已经在我身边测试了你的代码，删除两行 ODataType = "#microsoft.graph.fileAttachment" 后，你的代码对我有用

标签： c# azure-functions microsoft-graph-api office365 outlook-restapi

【解决方案1】：

我为你写了一个演示，试试下面的简单控制台应用程序：

using Microsoft.Graph;
using Microsoft.Graph.Auth;
using Microsoft.Identity.Client;
using System;
using System.Collections.Generic;

namespace sendEmails
{
    class Program
    {
        static void Main(string[] args)
        {
            var appID = "";
            var appSec = "";
            var tenantID = "";
            

            IConfidentialClientApplication confidentialClientApplication = ConfidentialClientApplicationBuilder
                .Create(appID)
                .WithTenantId(tenantID)
                .WithClientSecret(appSec)
                .Build();

            ClientCredentialProvider authenticationProvider = new ClientCredentialProvider(confidentialClientApplication);

            GraphServiceClient graphServiceClient = new GraphServiceClient(authenticationProvider);

            var imagePath = @"<your image path>";
            var imageID = "image1";
            

            byte[] imageArray = System.IO.File.ReadAllBytes(imagePath);

            var body = "<h1>this is superman </br> <img src='cid:"+ imageID + "'/></h1>";
            var attachments = new MessageAttachmentsCollectionPage()
            {
                new FileAttachment{
                    ContentType= "image/jpeg",
                    ContentBytes = imageArray,
                    ContentId = imageID,
                    Name= "test-image"
                }
            };
            
            var message = new Message
            {
                Subject = "TEST SENDING IMAGE ",
                Body = new ItemBody
                {
                    ContentType = BodyType.Html,
                    Content = body,
                    ODataType = null
                },
                ToRecipients = new List<Recipient>()
                {
                    new Recipient
                    {
                        EmailAddress = new EmailAddress
                        {
                            Address = "<receiver email>"
                        }
                    }
                },
                Attachments = attachments

            };
            
            graphServiceClient.Users["<user upn>"].SendMail(message, false).Request().PostAsync().GetAwaiter().GetResult();
            Console.WriteLine("ok");
        }
    }
}

结果：

【讨论】：