如何在控制器中为 Json 渲染局部视图 [英] How to render partial view in controller for Json

问题描述

如何呈现要在控制器的 JsonResult 中使用的局部视图?

How can I render a partial view to be used in a JsonResult in a controller?

return Json(new
{
    Html = this.RenderPartialView("_EditMovie", updatedMovie),
    Message = message
}, JsonRequestBehavior.AllowGet);

推荐答案

RenderPartialView 是一种自定义扩展方法，它将视图呈现为 string.

RenderPartialView is a custom extension method which renders a view as a string.

没有提到 在文章中(您最初提到的内容)但您可以在文章所附的示例代码中找到它.它可以在 HelpersReders.cs

It wasn't mentioned in the article (what you have referred originally) but you find it in the sample code attached to the article. It can be found under the HelpersReders.cs

这是有问题的方法的代码:

Here is code of the method in question:

public static string RenderPartialView(this Controller controller, 
    string viewName, object model)
{
    if (string.IsNullOrEmpty(viewName))
        viewName = controller.ControllerContext.RouteData
            .GetRequiredString("action");

    controller.ViewData.Model = model;
    using (var sw = new StringWriter())
    {
        ViewEngineResult viewResult = ViewEngines.Engines
            .FindPartialView(controller.ControllerContext, viewName);
        var viewContext = new ViewContext(controller.ControllerContext, 
            viewResult.View, controller.ViewData, controller.TempData, sw);
        viewResult.View.Render(viewContext, sw);

        return sw.GetStringBuilder().ToString();
    }
}

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