c# - 找不到 View

Question

使用以下代码:

static string RenderViewToString(ControllerContext context,string viewPath,object model = null,bool partial = false)
{
    // first find the ViewEngine for this view
    ViewEngineResult viewEngineResult = null;
    if (partial)
        viewEngineResult = ViewEngines.Engines.FindPartialView(context, viewPath);
    else
        viewEngineResult = ViewEngines.Engines.FindView(context, viewPath, null);

    if (viewEngineResult == null)
        throw new FileNotFoundException("View cannot be found.");

    // get the view and attach the model to view data
    var view = viewEngineResult.View;
    context.Controller.ViewData.Model = model;

    string result = null;

    using (var sw = new StringWriter())
    {
        var ctx = new ViewContext(context, view,
                                  context.Controller.ViewData,
                                  context.Controller.TempData,
                                  sw);
        view.Render(ctx, sw);
        result = sw.ToString();
    }

    return result;
}

在这一行之后:

viewEngineResult = ViewEngines.Engines.FindPartialView(context, viewPath);

执行后，我发现 viewEngineResult 为 NULL，我认为这意味着即使我将它正确地放置在同一路径中也找不到该 View 。

Answer 1

我不确定为什么您的代码返回 null，但这在 Controller 的上下文中对我有用:

    public string RenderRazorViewToString(string viewName, object model = null)
    {
        ViewData.Model = model;
        using (var sw = new System.IO.StringWriter())
        {
            var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName);
            var viewContext = new ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw);
            viewResult.View.Render(viewContext, sw);
            return sw.GetStringBuilder().ToString();
        }
    }

用法:

    var result = RenderRazorViewToString("_GridHeaderStudentCell");

不过，您可以很容易地修改它以将 ControllerContext 作为参数。