Question

我使用MVCMailer和asp.net MVC 3。这是一个很棒的图书馆，但我有一个问题。

我看到可以将图像嵌入电子邮件中，如下所示：

var resources = new Dictionary<string, string>();
resources["image"] = imagePath;
PopulateBody(mailMessage, "WelcomeMessage", resources);

因此看起来“资源”期望从文件系统到图像的路径，但是，我的图像在内存流中。

是否可以直接将图像作为base64嵌入，而无需在磁盘上实际写入文件然后传递路径？

感谢您的帮助！

Answer 1

Baucause MVCMailer基于System.Net.Mail，很容易将LinkedResource添加为流。

以下是修复：

在ILinkedResourceProvider.cs中添加：

List<LinkedResource> GetAll(Dictionary<string, MemoryStream> resources);
LinkedResource Get(string contentId, MemoryStream stream);

LinkedResourceProvider中的

添加：

public virtual List<LinkedResource> GetAll(Dictionary<string, MemoryStream> resources)
{
    var linkedResources = new List<LinkedResource>();
    foreach (var resource in resources)
    {
        linkedResources.Add(Get(resource.Key, resource.Value));
    }
    return linkedResources;
}
public virtual LinkedResource Get(string contentId, MemoryStream stream)
{
    LinkedResource resource = new LinkedResource(stream);
    resource.ContentId = contentId;
    return resource;
}

在MailerBase.cs中添加：

public virtual void PopulateBody(MailMessage mailMessage, string viewName, Dictionary<string, MemoryStream> linkedResources)
{
    PopulateBody(mailMessage, viewName, null, linkedResources);
}
public virtual void PopulateBody(MailMessage mailMessage, string viewName, string masterName = null, Dictionary<string, MemoryStream> linkedResources = null)
{
    if (mailMessage == null)
    {
        throw new ArgumentNullException("mailMessage", "mailMessage cannot be null");
    }

    masterName = masterName ?? MasterName;

    var linkedResourcesPresent = linkedResources != null && linkedResources.Count > 0;
    var textExists = TextViewExists(viewName, masterName);

    //if Text exists, it always goes to the body
    if (textExists)
    {
        PopulateTextBody(mailMessage, viewName, masterName);
    }

    // if html exists
    if (HtmlViewExists(viewName, masterName))
    {
        if (textExists || linkedResourcesPresent)
        {
            PopulateHtmlPart(mailMessage, viewName, masterName, linkedResources);
        }
        else
        {
            PopulateHtmlBody(mailMessage, viewName, masterName);
        }
    }
}
public virtual AlternateView PopulateHtmlPart(MailMessage mailMessage, string viewName, string masterName, Dictionary<string, MemoryStream> linkedResources)
{
    var htmlPart = PopulatePart(mailMessage, viewName, "text/html", masterName);
    if (htmlPart != null)
    {
        PopulateLinkedResources(htmlPart, linkedResources);
    }
    return htmlPart;
}
public virtual List<LinkedResource> PopulateLinkedResources(AlternateView mailPart, Dictionary<string, MemoryStream> resources)
{
    if (resources == null || resources.Count == 0)
        return new List<LinkedResource>();

    var linkedResources = LinkedResourceProvider.GetAll(resources);
    linkedResources.ForEach(resource => mailPart.LinkedResources.Add(resource));
    return linkedResources;
}

希望它将成为下一个MVCMailer发布的一部分。

使用MVCMailer将MemoryStream中的图像嵌入电子邮件中

1 个答案: