Pass ViewData to RenderPartial

Question

I'm trying to call this method:

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

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

but I don't see any way to construct a ViewDataDictionary in an expression, like:

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

Any ideas how to do that?

Monsignor · Answer 1 · 2016-11-22T07:24:52.697

29

This worked for me:

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

edited Nov 22 '16 at 07:24

answered Nov 04 '10 at 08:53

Monsignor

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score 11 · Answer 2 · answered Jan 22 '10 at 15:05

I've managed to do this with the following extension method:

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);
}

calling it this way:

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

+1 for showing how to create/modify the ViewDataDictionary, but not a fan of taking a strongly typed method and using instead a more loosely typed one just to avoid declaring the ViewDataDictionary. If you get used to using RenderPartialWithData, but then you need other overloads of RenderPartial, you have to create even more overloads of your own method. It is clever, but I feel like you might be setting yourself up for more work rather than less. — AaronLS, Nov 01 '12 at 21:38

score 3 · Answer 3 · answered Jan 22 '10 at 13:16

3

You can do:

new ViewDataDictionary(new { ForPrinting = True })

As viewdatadictionary can take an object to reflect against in its constructor.

answered Jan 22 '10 at 13:16

Brian Mains

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You are right, my apologies. I was thinking the RouteValuesDictionary, though oddly named for this function, you can use this as new RouteValuesDictionary(new { .. }), and this extracts the property values and make them individual key/value pairs, which then you can pass these to the viewdatadictionary instance. – Brian Mains Jan 22 '10 at 15:01
Yes, with RouteValuesDictionary you can do it. – Pablo Fernandez Jan 22 '10 at 15:04

score 0 · Answer 4 · answered Jun 11 '13 at 06:19

This is not exactly what you asked for, but you can use 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;
}

Pass ViewData to RenderPartial

4 Answers4