将 MVC3 操作从 WCF REST 服务方法呈现为字符串

Question

我有一个 WCF REST 服务，它接受一些参数并发送电子邮件。电子邮件的模板是 MVC3 操作。本质上我想将该操作呈现为字符串。

如果它是 ASP.NET WebForm，我可以简单地使用 Server.Execute(path, stringWriter, false)。但是，当我插入操作的路径时，我收到执行子请求时出错。

我可以从我的服务 (AspNetCompatibilityRequirementsMode.Allowed) 完全访问 HttpContext。

我知道还有其他答案可以从控制器的上下文中将操作呈现给字符串。当我不在那个世界但仍在同一服务器上（并且就此而言，在同一个应用程序中）时，我该如何执行此操作？

Answer 1

我根据几个不同的谷歌搜索拼凑了一个答案。它有效，但我不能 100% 确定它是否尽可能精简。我将代码粘贴给其他人尝试。

string GetEmailText(TemplateParameters parameters) {
    // Get the HttpContext
    HttpContextBase httpContextBase = 
        new HttpContextWrapper(HttpContext.Current);
    // Build the route data
    var routeData = new RouteData();
    routeData.Values.Add("controller", "EmailTemplate");
    routeData.Values.Add("action", "Create");

    // Create the controller context
    var controllerContext = new ControllerContext(
        new RequestContext(httpContextBase, routeData), 
        new EmailTemplateController());

    var body = ((EmailTemplateController)controllerContext.Controller)
               .Create(parameters).Capture(controllerContext);
    return body;
}

// Using code from here:
// http://blog.approache.com/2010/11/render-any-aspnet-mvc-actionresult-to.html
public class ResponseCapture : IDisposable
{
    private readonly HttpResponseBase response;
    private readonly TextWriter originalWriter;
    private StringWriter localWriter;
    public ResponseCapture(HttpResponseBase response)
    {
        this.response = response;
        originalWriter = response.Output;
        localWriter = new StringWriter();
        response.Output = localWriter;
    }
    public override string ToString()
    {
        localWriter.Flush();
        return localWriter.ToString();
    }
    public void Dispose()
    {
        if (localWriter != null)
        {
            localWriter.Dispose();
            localWriter = null;
            response.Output = originalWriter;
        }
    }
}
public static class ActionResultExtensions
{
    public static string Capture(this ActionResult result, ControllerContext controllerContext)
    {
        using (var it = new ResponseCapture(controllerContext.RequestContext.HttpContext.Response))
        {
            result.ExecuteResult(controllerContext);
            return it.ToString();
        }
    }
}