ASP.Net MVC Ajax.BeginForm OnComplete pass c# arguments in Razor view

Question

I have the following code in a MVC c# Razor view:

@{string url = "/Projects/_MonthRangesScriptsPartial";}
@using (Ajax.BeginForm(
  "_MonthRanges", 
  "Projects", 
  new { id = ViewBag.InputResourceID }, 
  new AjaxOptions { 
    HttpMethod = "POST", 
    UpdateTargetId = "MonthRanges", 
    InsertionMode = InsertionMode.Replace,
    OnComplete = "updategraphArrayScript(@url,@ViewBag.InputResourceID)"
  }))

The code works almost perfectly, but I would like to resolve the c# variables to their values in the OnComplete line.

That is to say, the Razor engin should resolve the code to (for example):

<form action="/Projects/_MonthRanges/55" 
  data-ajax="true" data-ajax-complete="updategraphArrayScript(/Projects/assets,55)"
  ...>

Rather than:

<form action="/Projects/_MonthRanges/55" 
  data-ajax="true" data-ajax-complete="updategraphArrayScript(@url,@ViewBag.InputResourceID)"
  ...>

Samuel Caillerie · Accepted Answer · 2013-04-11 13:41:33Z

4

Simply create another variable string:

@{
    string url = "/Projects/_MonthRangesScriptsPartial";
    string onComplete = String.Format("updategraphArrayScript({0}, {1})", url, ViewBag.InputResourceID);
}

@using (Ajax.BeginForm(
  "_MonthRanges", 
  "Projects", 
  new { id = ViewBag.InputResourceID }, 
  new AjaxOptions { 
    HttpMethod = "POST", 
    UpdateTargetId = "MonthRanges", 
    InsertionMode = InsertionMode.Replace,
    OnComplete = @onComplete
  }))

edited Apr 11, 2013 at 13:41

answered Apr 11, 2013 at 11:41

Samuel Caillerie

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4 Comments

Chopo87 Over a year ago

Exelent, and so elegant too. Thanks!

Chopo87 Over a year ago

Sorry for having to unaccept the solution: As the url is a string, I have to pass it in quote marks string url = "\'/Projects/_MonthRangesScriptsPartial\'"; I can escape the quotemarks so that the String.Format does not replace them with ', but then Ajax.BeginForm decides to replace them with &#39 anyway. Double and tripple escaping don't seam to worth either - any ideas

Samuel Caillerie Over a year ago

But if you pass onComplete between quotes as indicated in my code, this should work...

Chopo87 Over a year ago

If I pass it between quotes I end up with data-ajax-complete="@onComplete". however I think this is realy a separate question about how razor deals with quote marks, so I will post in a new question

Nick Albrecht · Accepted Answer · 2013-04-11 14:32:08Z

0

Take off the @ when you assign your OnComplete value. You don't need it since you're already in the context of server side code.

@ is used to switch html rendering context to server side code, and <text></text> is used to switch from server side context to html rendering. In example given above, you're already in the server side code context of the BeginForm() method so the @ is not needed. You're not writing the value of onComplete to the page, BeginForm() will handle all that.

answered Apr 11, 2013 at 14:32

Nick Albrecht

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1 Comment

Chopo87 Over a year ago

Thanks for the info. However, even without the @, I still end up with &#39.

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