ASP。NET MVC电子邮件

这就是我想要的ASP。NET MVC ViewEngine可以做,但它在Spark中,只需点击下面的最新链接,

更新(12/30/2009)清洁版本: ASP.NET MVC Email Template Solution

(11/16/2009)

using System;
using Spark;
using Spark.FileSystem;

public class User
{
    public int Id { get; set; }
    public string Name { get; set; }
}

public abstract class EmailView : AbstractSparkView
{
    public User user { get; set; }
}

class Program
{
    static void Main(string[] args)
    {
        // following are one-time steps

        // create engine
        var settings = new SparkSettings()
            .SetPageBaseType(typeof(EmailView));

        var templates = new InMemoryViewFolder();
        var engine = new SparkViewEngine(settings)
                     {
                         ViewFolder = templates
                     };

        // add templates
        templates.Add("sample.spark", @"Dear ${user.Name}, This is an email.Sincerely, Spark View Engine http://constanto.org/unsubscribe/${user.Id}");

        // following are per-render steps

        // render template
        var descriptor = new SparkViewDescriptor()
            .AddTemplate("sample.spark");

        var view = (EmailView)engine.CreateInstance(descriptor);
        view.user = new User { Id = 655321, Name = "Alex" };
        view.RenderView(Console.Out);
        Console.ReadLine();
    }
}

• 它可以实现页眉/页脚以允许模板!
• 你可以使用循环、条件句等。。。

请务必阅读这些帖子。Louis DeJardin的所有功劳请参阅他的教程:): Using Spark as a general purpose template engine! , Email Templates Revisited

为什么需要从视图创建电子邮件?为什么不使用普通的旧模板文件?我经常这样做——我制作了一个模板,并使用城堡项目中的NVelocity引擎(不要与高速VIEW引擎混淆)来渲染模板。

例子:

var nvEngine = new NVelocityEngine();
nvEngine.Context.Add("FullName", fullName);
nvEngine.Context.Add("MallName", voucher.Mall.Name);
nvEngine.Context.Add("ConfirmationCode", voucher.ConfirmationCode);
nvEngine.Context.Add("BasePath", basePath);
nvEngine.Context.Add("TermsLink", termsLink);
nvEngine.Context.Add("LogoFilename", voucher.Mall.LogoFilename);

var htmlTemplate = System.IO.File.ReadAllText(
    Request.MapPath("~/App_Data/Templates/Voucher.html"));

var email = nvEngine.Render(htmlTemplate);

NVelocityEngine类是我围绕Castle项目提供的NVelocity端口编写的一个包装器,如下所示:

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using NVelocity;
using NVelocity.App;

namespace MyProgram
{
    /// <summary>
    /// A wrapper for the NVelocity template processor
    /// </summary>
    public class NVelocityEngine : VelocityEngine
    {
        Hashtable context = new Hashtable();

        /// <summary>
        /// A list of values to be merged with the template
        /// </summary>
        public Hashtable Context
        {
            get { return context; }
        }

        /// <summary>
        /// Default constructor
        /// </summary>
        public NVelocityEngine()
        {
            base.Init();
        }

        /// <summary>
        /// Renders a template by merging it with the context items
        /// </summary>
        public string Render(string template)
        {
            VelocityContext nvContext;

            nvContext = new VelocityContext(context);
            using (StringWriter writer = new StringWriter())
            {
                this.Evaluate(nvContext, writer, "template", template);
                return writer.ToString();
            }
        }
    }
}

这样,您根本不必干预视图引擎,理论上您可以将其与ASP链接起来。NET视图引擎,如果你愿意的话,就像我在下面的控制器方法中所做的那样:

public ActionResult ViewVoucher(string e)
{
    e = e.Replace(' ', '+');
    var decryptedEmail = CryptoHelper.Decrypt(e);
    var voucher = Voucher.FindByEmail(decryptedEmail);
    if (voucher == null) return View("Error", new Exception("Voucher not found."));

    var basePath = new Uri(Request.Url, Url.Content("~/")).ToString();
    var termsLink = new Uri(Request.Url, Url.Action("TermsGC", "Legal")).ToString();
    basePath = basePath.Substring(0, basePath.Length - 1);

    var fullName = voucher.FirstName;
    if (!string.IsNullOrEmpty(voucher.LastName))
        fullName += " " + voucher.LastName;

    var nvEngine = new NVelocityEngine();
    nvEngine.Context.Add("FullName", fullName);
    nvEngine.Context.Add("MallName", voucher.Mall.Name);
    nvEngine.Context.Add("ConfirmationCode", voucher.ConfirmationCode);
    nvEngine.Context.Add("BasePath", basePath);
    nvEngine.Context.Add("TermsLink", termsLink);
    nvEngine.Context.Add("LogoFilename", voucher.Mall.LogoFilename);

    var htmlTemplate = System.IO.File.ReadAllText(
        Request.MapPath("~/App_Data/Templates/Voucher.html"));

    return Content(nvEngine.Render(htmlTemplate));
}

尝试使用火花视图引擎( http://www.sparkviewengine.com/

您还可以使用此答案中的函数 Render a view as a string ,但这需要伪造上下文。这是标准视图引擎的工作方式,您对此无能为力。

这是我的扩展类,用于生成字符串视图。第一个是标准视图引擎,第二个是Spark:

public static class ControllerHelper
{
    /// <summary>Renders a view to string.</summary>
    public static string RenderViewToString(this Controller controller,
                                            string viewName, object viewData)
    {
        //Getting current response
        var response = HttpContext.Current.Response;
        //Flushing
        response.Flush();

        //Finding rendered view
        var view = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName).View;
        //Creating view context
        var viewContext = new ViewContext(controller.ControllerContext, view,
                                          controller.ViewData, controller.TempData);

        //Since RenderView goes straight to HttpContext.Current, we have to filter and cut out our view
        var oldFilter = response.Filter;
        Stream filter = new MemoryStream(); ;
        try
        {
            response.Filter = filter;
            viewContext.View.Render(viewContext, null);
            response.Flush();
            filter.Position = 0;
            var reader = new StreamReader(filter, response.ContentEncoding);
            return reader.ReadToEnd();
        }
        finally
        {
            filter.Dispose();
            response.Filter = oldFilter;
        } 
    }

    /// <summary>Renders a view to string.</summary>
    public static string RenderSparkToString(this Controller controller,
                                            string viewName, object viewData)
    {
        var view = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName).View;
        //Creating view context
        var viewContext = new ViewContext(controller.ControllerContext, view,
                                          controller.ViewData, controller.TempData);

        var sb = new StringBuilder();
        var writer = new StringWriter(sb);

        viewContext.View.Render(viewContext, writer);
        writer.Flush();
        return sb.ToString();
    }
}

如果你想要简单的文本替换。NET有这样的功能:

        ListDictionary replacements = new ListDictionary();

        // Replace hard coded values with objects values
        replacements.Add("{USERNAME}", "NewUser");            
        replacements.Add("{SITE_URL}", "http://yourwebsite.com");
        replacements.Add("{SITE_NAME}", "My site's name");

        string FromEmail= "from@yourwebsite.com";
        string ToEmail = "newuser@gmail.com";

        //Create MailDefinition
        MailDefinition md = new MailDefinition();

        //specify the location of template
        md.BodyFileName = "~/Templates/Email/Welcome.txt";
        md.IsBodyHtml = true;
        md.From = FromEmail;
        md.Subject = "Welcome to youwebsite.com ";

        System.Web.UI.Control ctrl = new System.Web.UI.Control { ID = "IDontKnowWhyThisIsRequiredButItWorks" };

        MailMessage message = md.CreateMailMessage(ToEmail , replacements, ctrl);

        //Send the message
        SmtpClient client = new SmtpClient();

        client.Send(message);

以及Welcome.txt文件

    Welcome - {SITE_NAME}<br />
    <br />
    Thank you for registering at {SITE_NAME}<br />
    <br />
    Your account is activated and ready to go! <br />
    To login, visit <a href="{SITE_URL}">{SITE_NAME}</a> and use the following credentials:
    <br />
    username: <b>{USERNAME}</b><br />
    password: use the password you registered with
    <br />
    <br />

    - {SITE_NAME} Team

同样,这只适用于简单的字符串替换。如果你计划通过电子邮件发送更多数据,你需要正确格式化,然后更换。

你可以考虑使用MvcMailer NuGet——它只做你想要的事情,而且做得很干净。查看NuGet包 here 和那个 project documentation

希望它能有所帮助!

我为LukLed的RenderSparkToString方法创建了一个重载,允许您在视图中使用spark布局:

public static string RenderSparkToString(this Controller controller,
                                        string viewName, string masterName, object viewData)
{
    var view = ViewEngines.Engines.FindView(controller.ControllerContext, viewName, masterName).View;
    //Creating view context
    var viewContext = new ViewContext(controller.ControllerContext, view,
                                      controller.ViewData, controller.TempData);

    var sb = new StringBuilder();
    var writer = new StringWriter(sb);

    viewContext.View.Render(viewContext, writer);
    writer.Flush();
    return sb.ToString();
}