Question

您好我正在创建一个小网页，为我们的用户提供在我们的数据库中搜索的界面。

本网站必须提供2个网络服务功能，搜索（字符串搜索字符串）和GetAccountInfoByInitials（字符串首字母）

我想使用我的控制器执行此操作，但我无法找到如何从ViewResult中获取html。

我试过以下，但是result.ToString（）只给我字符串“System.Web.Mvc.ViewResult”

public class SearchService : ISearchService

{

private readonly ServiceHandlerController _controller;
public SearchService()
{
    _controller = new ServiceHandlerController();
}

public string Search(string searchString)
{
    var result = _controller.Search(searchString);
    return result.ToString();
}

public string GetAccountInfoByInitials(string initials)
{
    var result = _controller.Search(initials).ToString();
    return result;
}

}

Answer 1

我以几乎相同的方式执行此操作，但实际上使用控制器iteself将partialview返回到字符串。

我在我的基本控制器中使用以下扩展方法：

public static class ExtensionMethods
{
    public static string RenderPartialToString(this ControllerBase controller, string partialName, object model)
    {
        var vd = new ViewDataDictionary(controller.ViewData);
        var vp = new ViewPage
        {
            ViewData = vd,
            ViewContext = new ViewContext(),
            Url = new UrlHelper(controller.ControllerContext.RequestContext)
        };

        ViewEngineResult result = ViewEngines
                                  .Engines
                                  .FindPartialView(controller.ControllerContext, partialName);

        if (result.View == null)
        {
            throw new InvalidOperationException(
            string.Format("The partial view '{0}' could not be found", partialName));
        }
        var partialPath = ((WebFormView)result.View).ViewPath;

        vp.ViewData.Model = model;

        Control control = vp.LoadControl(partialPath);
        vp.Controls.Add(control);

        var sb = new StringBuilder();

        using (var sw = new StringWriter(sb))
        {
            using (var tw = new HtmlTextWriter(sw))
            {
                vp.RenderControl(tw);
            }
        }
        return sb.ToString();
    }
}

然后以下列方式返回我的部分视图：

return Content(this.RenderPartialToString("myPartialView", myModel));

这应该可以帮到你。

Answer 2

“查看结果”不会自动保留页面。 Asp.net MVC使用它，以及配置为获取实际页面的View Engine。

如果您使用的是默认视图引擎，则会遇到障碍 - 请参阅link text。基本上是因为asp.net视图引擎与上下文绑定在一起。其他视图引擎不会给您这个问题，但如果您尝试减少的资产已经依赖于默认视图引擎，那么这就失败了。还有其他方法，但我不确定这对你有多方便。

Answer 3

这是我发布的与此类似的问题的答案： Is there a way to process an MVC view (aspx file) from a non-web application?

public class AspHost : MarshalByRefObject
{
    public string _VirtualDir;
    public string _PhysicalDir;

    public string ViewToString<T>(string aspx, Dictionary<string, object> viewData, T model)
    {
        StringBuilder sb = new StringBuilder();
        using (StringWriter sw = new StringWriter(sb))
        {
            using (HtmlTextWriter tw = new HtmlTextWriter(sw))
            {
                var workerRequest = new SimpleWorkerRequest(aspx, "", tw);
                HttpContext.Current = new HttpContext(workerRequest);

                ViewDataDictionary<T> viewDataDictionary = new ViewDataDictionary<T>(model);
                foreach (KeyValuePair<string, object> pair in viewData)
                {
                    viewDataDictionary.Add(pair.Key, pair.Value);
                }

                object view = BuildManager.CreateInstanceFromVirtualPath(aspx, typeof(object));

                ViewPage viewPage = view as ViewPage;
                if (viewPage != null)
                {
                    viewPage.ViewData = viewDataDictionary;
                }
                else
                {
                    ViewUserControl viewUserControl = view as ViewUserControl;
                    if (viewUserControl != null)
                    {
                        viewPage = new ViewPage();
                        viewPage.Controls.Add(viewUserControl);
                    }
                }

                if (viewPage != null)
                {
                    HttpContext.Current.Server.Execute(viewPage, tw, true);

                    return sb.ToString();
                }

                throw new InvalidOperationException();
            }
        }
    }

    public static AspHost SetupFakeHttpContext(string physicalDir, string virtualDir)
    {
        return (AspHost)ApplicationHost.CreateApplicationHost(
            typeof(AspHost), virtualDir, physicalDir);
    }
}

然后，渲染文件：

var host = AspHost.SetupFakeHttpContext("Path/To/Your/MvcApplication", "/");
var viewData = new ViewDataDictionary<SomeModelType>(){ Model = myModel };
String rendered = host.ViewToString("~/Views/MyView.aspx", new Dictionary<string, object>(viewData), viewData.Model);

ASP.NET MVC在MVC应用程序上下文之外使用Controller或View

3 个答案: