Rotativa PDF in model - ControllerContext

Question

我正在使用Rotativa从动作/视图生成PDF，它工作得很好。但是，是否可以在模型内部使用它，或者您是否可以仅在控制器中使用它？

问题是该函数想要使用模型没有的ControllerContext

var pdfResult = new ActionAsPdf("GeneratePDF", "PDF");

byte[] pdfFile = pdfResult.BuildPdf(this.ControllerContext);

我的最终结果是，如果有其他方法，我希望PDF以字节数组的形式存在

Answer 1

您可以使用以下代码来实例化控制器，然后通过该实例配置ControllerContext -从应用程序中的任何位置。

/// <summary>
/// Creates an instance of an MVC controller from scratch 
/// when no existing ControllerContext is present       
/// </summary>
/// <typeparam name="T">Type of the controller to create</typeparam>
/// <returns>Controller Context for T</returns>
/// <exception cref="InvalidOperationException">thrown if HttpContext not available</exception>
public static T CreateController<T>(RouteData routeData = null)
            where T : Controller, new()
{
    // create a disconnected controller instance
    T controller = new T();

    // get context wrapper from HttpContext if available
    HttpContextBase wrapper = null;
    if (HttpContext.Current != null)
        wrapper = new HttpContextWrapper(System.Web.HttpContext.Current);
    else
        throw new InvalidOperationException(
            "Can't create Controller Context if no active HttpContext instance is available.");

    if (routeData == null)
        routeData = new RouteData();

    // add the controller routing if not existing
    if (!routeData.Values.ContainsKey("controller") && !routeData.Values.ContainsKey("Controller"))
        routeData.Values.Add("controller", controller.GetType().Name
                                                    .ToLower()
                                                    .Replace("controller", ""));

    controller.ControllerContext = new ControllerContext(wrapper, routeData, controller);
    return controller;
}

这可以像这样使用：

QuotesController quotesController = ViewRenderer.CreateController<QuotesController>();
ViewAsPdf view = (ViewAsPdf)quotesController.Preview(model.Guid);
byte[] pdf = view.BuildPdf(quotesController.ControllerContext);
EmailService.Send(model, pdf);

参考：http://weblog.west-wind.com/posts/2013/Jul/15/Rendering-ASPNET-MVC-Razor-Views-outside-of-MVC-revisited