asp.net MVC RC1 RenderPartial ViewDataDictionary

Question

I'm trying to pass a ViewData object from a master page to a view user control using the ViewDataDictionary.

The problem is the ViewDataDictionary is not returning any values in the view user control whichever way I try it.

The sample code below is using an anonymous object just for demonstration although neither this method or passing a ViewData object works.

Following is the RenderPartial helper method I'm trying to use:

<% Html.RenderPartial("/Views/Project/Projects.ascx", ViewData.Eval("Projects"), new ViewDataDictionary(new { Test = "Mark" })); %>

and in my view user control i do the following:

<%= Html.Encode(ViewData["Test"]) %>

Why does this not return anything?

Thanks for your help.

EDIT:

I'm able to pass and access the strongly typed model without any problems. it's the ViewDataDictionary which I'm trying to use to pass say just a single value outside of the model...

Alan · Accepted Answer · 2010-04-12 02:25:57Z

36

This is the neatest way I've seen to do this:

<% Html.RenderPartial("/Views/Project/Projects.ascx", Model, new ViewDataDictionary{{"key","value"}});%>

It may be a little hackish, but it let's you send the model through AND some extra data.

answered Apr 12, 2010 at 2:25

Alan

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Josiah Ruddell · Accepted Answer · 2010-02-16 21:47:44Z

13

Don't know if anyone still cares but I used a KeyValuePair for the ViewDataDictionary.

 <% Html.RenderPartial("ItemRow", item, new ViewDataDictionary{
        new KeyValuePair<string, object>("url", url),
        new KeyValuePair<string, object>("count", count),
        new KeyValuePair<string, object>("className", className)
 }); %>

This way you can write everything in one statement. The KVPs can be accessed in the view by:

<%= ViewData["url"] %>
<%= ViewData["count"] %>
<%= ViewData["className"] %>

While what I passed through the model can be accessed through Model.*

answered Feb 16, 2010 at 21:47

Josiah Ruddell

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Jonathan Carroll · Accepted Answer · 2009-03-23 23:51:06Z

6

I'm using the RTM version of ASP.Net MVC, but with:

<% Html.RenderPartial("~/Views/Project/Projects.ascx", new ViewDataDictionary(new {Key = "Some value"})); %>

Try the following when referencing the value in your partial view:

<%= ViewData.Eval("Key") %>

That seems to have done the trick for me. It will also work if you just do this:

<% Html.RenderPartial("~/Views/Project/Projects.ascx", new {Key = "Some value"}); %>

Hope this helps.

answered Mar 23, 2009 at 23:51

Jonathan Carroll

Comments

Nick Berardi · Accepted Answer · 2009-01-30 12:54:14Z

5

Have you tried:

<% Html.RenderPartial("~/Views/Project/Projects.ascx", ViewData); %>

Also have you verified ViewData["Test"] is in the ViewData before you are passing it? Also note that when passing your ViewData to a Partial Control that it is important to keep the Model the same.

Nick

answered Jan 30, 2009 at 12:54

Nick Berardi

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1 Comment

Mark79 Over a year ago

Thanks but I'm able to pass the model without any problems. it's the ViewDataDictionary which i'm trying to use to pass say just a single value outside of the model..

Tim Scott · Accepted Answer · 2009-01-30 15:25:32Z

1

In your main view:

<% Html.RenderPartial("~/Views/Project/Projects.ascx", ViewData["Projects"]); %>

Either in you controller or your main view:

ViewData["Test"] = "Mark";

If you don't specify a model or view data dictionary in RenderPartail, it uses the ones from the containing view.

answered Jan 30, 2009 at 15:25

Tim Scott

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