asp.net mvc - Set radio button checked item from ASP MVC 3 controller -


below group of radio buttons appear on view. able retrieve selected item via simple code

string criteria = filter["criteria"];

however not know how retain selected item. once controller posts view default radio button selected. 

    <form method="post">         @html.textbox("searchvalue", viewbag.currentfilter string, new { placeholder = "search" })         <input type="image" src="@url.content("~/content/images/filter.bmp")" alt="filter" style="padding-top: 0px;" />             <span class="error" style="clear: both;">                 @viewbag.errormessage            </span>         <a href="#" style="padding-left: 30px;"></a>         <br />         <br />         <input type="radio" name="criteria" id="bankname" value="bankname" checked="true"/>         <label for="bankname">bank name</label>         <input type="radio" name="criteria" id="epurl" value="epurl" />         <label for="epurl">epurl</label>         <input type="radio" name="criteria" id="specialnotes" value="specialnotes" />         <label for="specialnotes">special notes</label>         <input type="radio" name="criteria" id="email" value="email" />         <label for="email">email</label>         <input type="radio" name="criteria" id="dynamicsid" value="dynamicsid" />         <label for="dynamicsid">dynamics id</label>         <input type="radio" name="criteria" id="stat" value="stat" />         <label for="fixed">agent id &nbsp;</label>     </form>

the answer question wound being incredibly simple. first mistake made not using @html controls. second using formcollection input parameter index controller. changing radio buttons following: 

        @html.radiobutton("criteria", "bankname", true)<span>bank name</span>         @html.radiobutton("criteria", "epurl")<span>epurl</span>         @html.radiobutton("criteria", "specialnotes")<span>special notes</span>         @html.radiobutton("criteria", "email")<span>email</span>         @html.radiobutton("criteria", "dynamicsid")<span>dynamics id</span>         @html.radiobutton("criteria", "stat")<span>agent id</span>

and signature of index method in controller this: 

public actionresult index(string criteria, string searchvalue)

the selected radio button stayed selected after post back.


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