代码之家 › 专栏 › 技术社区 › Androme

ASP.NETMVC在MVC应用程序上下文之外使用控制器或视图

viewengine web-services asp.net-mvc

Androme · 技术社区 · 15 年前

你好,我正在创建一个小网页,让我们的用户在我们的数据库中搜索界面。

这个网站必须提供2个webservice函数,Search(string searchString)和GetAccountInfoByInitials(string initials)

我想使用我的控制器来做这件事,但我无法找到我如何可以得到一个ViewResult的html。

我试过以下方法,但是result.to字符串()只给我字符串“系统.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;
}

}

3 回复 | 直到 15 年前

Community Mohan Dere 8 年前

这是对我发布的一个类似于以下问题的回答: 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);
    }
}

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);

jim tollan 15 年前

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返回给string。

我在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();
    }
}

然后以以下方式返回我的partialview:

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

希望这能帮你解决问题。

Community Mohan Dere 8 年前

如果使用默认视图引擎,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。其他视图引擎不会给您这个问题,但是如果您试图减少的资产已经依赖于默认视图引擎,那么这就无法达到目的。还有其他的方法,但我不确定这些方法对你有多方便。