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Creating non-variable querystrings using Action Link helpers

, 27 Jul 2012 CPOL
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How to create non-variable querystrings using Action Link helpers.


This post is more kind of tip. The action link HTML helpers really simplifies our job in generating hyperlinks. These HTML helpers are integrated with the routing infrastructure and that helps to generate links very smartly. There are lot of overloaded versions available but all of them take the route values as anonymous objects.

    "Purchase Product",  // link text
    "Purchase",  // action name
    new { userName = Model.User  } // route values as an anonymous object

Sometimes the parameters that needs to be passed to the action don't need to be in routes but instead they have to be in query-strings.

An example,

In these cases also the built-in action link extensions works just fine because still we can pass the lat and lon querystring variables wrapped in an anonymous object new { lat = 12.2, lon = 23.5 }.

Suppose we need to generate an URL like below:

The querystring names contains a "." operator and when you use an anonymous object to pass these values as new { = 12.12, pos.lon = 23.5 } you will run into an exception. How we can fix this problem still using the built-in mechanism is the rest of this post.


The route values we pass as anonymous object are convereted into RouteValueDictionary that will be later used to generate the href for the anchors. There are overloaded action link helpers available that directly accepts RouteValueDictionary as parameter. As a dictionary we can easily pass querystrings that contains "." as below,

    "Show the location", 
    new RouteValueDictionary<string, object> {{"",12.12}, {"pos.lon",23.5}}, 


Removed the custom action link helper because we can directly pass the RouteValueDictionary to existing helpers - 7/27/2012. 




This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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GeneralBetter Option Pinmemberbruno123410-Jul-12 9:58 
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