Question

我正在尝试调用此方法：

RenderPartialExtensions.RenderPartial Method (HtmlHelper, String, Object, ViewDataDictionary)

http://msdn.microsoft.com/en-us/library/dd470561.aspx

但我没有看到在表达式中构造ViewDataDictionary的任何方法，例如：

<% Html.RenderPartial("BlogPost", Post, new { ForPrinting = True }) %>

任何想法如何做到这一点？

Answer 1

这对我有用：

<% Html.RenderPartial("BlogPost", Model, new ViewDataDictionary{ {"ForPrinting", "true"} });%>

Answer 2

我已设法使用以下扩展方法执行此操作：

public static void RenderPartialWithData(this HtmlHelper htmlHelper, string partialViewName, object model, object viewData) {
  var viewDataDictionary = new ViewDataDictionary();
  if (viewData != null) {
    foreach (PropertyDescriptor prop in TypeDescriptor.GetProperties(viewData)) {
      object val = prop.GetValue(viewData);
      viewDataDictionary[prop.Name] = val;
    }
  }
  htmlHelper.RenderPartial(partialViewName, model, viewDataDictionary);
}

这样称呼：

<% Html.RenderPartialWithData("BlogPost", Post, new { ForPrinting = True }) %>

Answer 3

你可以这样做：

new ViewDataDictionary(new { ForPrinting = True })

由于viewdatadictionary可以使对象在其构造函数中反映出来。

Answer 4

这不是您要求的，但您可以使用ViewContext.ViewBag。

// in the view add to the ViewBag:
ViewBag.SomeProperty = true;
...
Html.RenderPartial("~/Views/Shared/View1.cshtml");

// in partial view View1.cshtml then access the property via ViewContext:
@{
    bool someProperty = ViewContext.ViewBag.SomeProperty;
}

将ViewData传递给RenderPartial

4 个答案: