C# LinkedResource 使用 base64 字符串

Question

我怎么放这个==>url('data:image/jpeg;base64,/9j/4AAQSkZJRgABAgEASABIAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB') 到 new System.Net.Mail.LinkedResource()

从 C# 发送邮件，使用带有 base64 字符串的背景 css 样式，而不是文件 url。

Answer 1

我自己也想知道这个问题并得到了这篇文章。我解决了它并认为我会分享我的解决方案。

var imageData = Convert.FromBase64String("/9j/4AAQSkZJRgABAgEASABIAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB");

var contentId = Guid.NewGuid().ToString();
var linkedResource = new LinkedResource(new MemoryStream(imageData), "image/jpeg");
linkedResource.ContentId = contentId;
linkedResource.TransferEncoding = TransferEncoding.Base64;

var body = string.Format("<img src=\"cid:{0}\" />", contentId);
var htmlView = AlternateView.CreateAlternateViewFromString(body, null, "text/html");
htmlView.LinkedResources.Add(linkedResource);