找不到视图

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;
}

此行之后：

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

执行时，我发现viewEngineResult为NULL，我认为这意味着即使我将视图正确地放置在同一路径中，也找不到它。

Answer 1

我不确定为什么您的代码返回null，但这在控制器的上下文中对我有效：

    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，您可以很容易地将其修改为将ControllerContext作为参数。

Answer 2

可能找不到您的视图，请确保您的视图位于同名文件夹中，像这样的东西查找"日志"视图：

• Views文件夹
  • 日志文件夹
    • logs.cshtml文件