asp.net - Extending @Html.DropDownListFor -

i use following code extending @html.dropdownlistfor helper. controller gets list, , adding default value ienumerable in view model. don't want write of every time want dropdown default value. extending helper seems logical.

public class sitegetsitesviewmodel {     public string selectedsiteid { get; set; }     public ienumerable<selectlistitem> sitelistitems { get; set; } } public actionresult getsites() {     list<sitedto> sites = _siteservice.getsites();     const string defaulttext = "select site";     const string defaultvalue = "-1";      var sitegetsitesviewmodel = new sitegetsitesviewmodel         {             sitelistitems = enumerable.repeat(new selectlistitem                 {                     selected = true,                     text = defaulttext,                     value = defaultvalue                 }, 1).concat(sites.select(s => new selectlistitem                     {                         text = s.sitename,                         value = s.siteid.tostring()                     }))         };       return partialview("_getsites", sitegetsitesviewmodel); } 

html.dropdownlistfor supports adding default value choices already, there no need reinvent wheel:

use overload:

http://msdn.microsoft.com/en-us/library/ee703567(v=vs.108).aspx

@html.dropdownlistfor(     m => m.property,     getselectlist(),     "defaultoption", // text default option goes here     null )