c# - Evaluate value from web.config file via ViewBag -


the task simple. have value in web.config, this:

 <add key="menutypes" value="1,2,3"/>

and in razor file need render menus based on value. if have value 3 in config file (menutypes), want render item. , if don't have it, not want render it:

<div>               <ul id="setthemup" class="vehicles">                   <li><a class="bikes" href="#1">bikes</a></li>                   <li><a class="cars" href="#2">cars</a></li>                 @if (viewbag.menutypes(((int)3).tostring()) > -1)                 {                    <li><a class="trucks" href="#3">trucks</a></li>                }              </ul>

i have tried:

 <div>               <ul id="setthemup" class="vehicles">                   <li><a class="bikes" href="#1">bikes</a></li>                   <li><a class="cars" href="#2">cars</a></li>                 @if (viewbag.menutypes.contains("3"))                 {                    <li><a class="trucks" href="#3">trucks</a></li>                }              </ul> </div>

but on both cases getting: runtimebinderexception unhandled user code cannot perform runtime binding on null reference.

i got work this:

<add key="trucksenabled" value="true"/>  <div>               <ul id="setthemup" class="tabs">                   <li><a class="bikes" href="#1">bikes</a></li>                   <li><a class="cars" href="#2">cars</a></li>                 @if ((bool)viewbag.trucksenabled)                 {                    <li><a class="trucks" href="#3">trucks</a></li>                }              </ul> </div>

but cant use way. need work in first example. not razor/mvc. appreciated.

controller

var menutypes = webconfigurationmanager.appsettings["menutypes"].tostring()) string[] tokens = menutypes.split(','); //convert strings array viewbag.menutypes = tokens;

view -- menutypes list, can use contains():

@if (viewbag.menutypes.contains("3")) {      <li><a class="trucks" href="#3">trucks</a></li> }

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