c# - Get the list of Roles in ASP.NET MVC -

-

i have following methods list of roles stored in aspnetroles 

    [allowanonymous]     public async task<actionresult> register()     {         //get list of roles         viewbag.roleid = new selectlist(await rolemanager.roles.tolistasync(), "name", "name");          return view();     }

then in view follows 

    <div class="form-group">         <label class="col-md-2 control-label">             select user role         </label>         <div class="col-md-10">             @foreach (var item in (selectlist)viewbag.roleid)             {                 <input type="checkbox" name="selectedroles" value="@item.value" class="checkbox-inline" />                 @html.label(item.value, new { @class = "control-label" })             }         </div>     </div>

but once load page i'm getting object reference not set instance of object. error

line 175: viewbag.roleid = new selectlist(await rolemanager.roles.tolistasync(), "name", "name");

this rolemanager definition 

    public applicationrolemanager rolemanager     {                 {             return _rolemanager ?? httpcontext.getowincontext().get<applicationrolemanager>();         }         private set         {             _rolemanager = value;         }     }

this applicationrolemanager model

// configure rolemanager used in application. rolemanager defined in asp.net identity core assembly public class applicationrolemanager : rolemanager<applicationrole> {     public applicationrolemanager(irolestore<applicationrole, string> rolestore)         : base(rolestore)     {     }      public static applicationrolemanager create(identityfactoryoptions<applicationrolemanager> options, iowincontext context)     {         return new applicationrolemanager(new applicationrolestore(context.get<applicationdbcontext>()));     } }

in startup.auth, reference rolemanager this:

    public void configureauth(iappbuilder app)     {         // add reference         app.createperowincontext<applicationrolemanager>(applicationrolemanager.create);     }

make sure controller includes constructor:

        // include         private applicationrolemanager _rolemanager;         // have         public applicationrolemanager rolemanager { { return _rolemanager ?? httpcontext.getowincontext().get<applicationrolemanager>(); } private set { _rolemanager = value; } }

rebuild, try again , sort out.


Comments

Post a Comment

Popular posts from this blog

java - Run spring boot application error: Cannot instantiate interface org.springframework.context.ApplicationListener -

-
i have spring project , try make use spring boot , run @ embadded tomcat following : https://spring.io/guides/gs/rest-service/ this application //@configuration //@enableaspectjautoproxy @springbootapplication @componentscan(basepackages = "gux.prome") public class application { public static void main(string[] args) { springapplication.run(application.class, args); } } if use maven command: mvn spring-boot:run , project starts fine, need debug , run main method @ intelij, exception occurs: exception in thread "main" java.lang.illegalargumentexception: cannot instantiate interface org.springframework.context.applicationlistener : org.springframework.boot.logging.classpathloggingapplicationlistener @ org.springframework.boot.springapplication.createspringfactoriesinstances(springapplication.java:414) @ org.springframework.boot.springapplication.getspringfactoriesinstances(springapplication.java:394) @ org.springframework.bo...
Read more

reactjs - React router and this.props.children - how to pass state to this.props.children -

-
i'm using react-router first time , don't know how think in yet. here's how i'm loading components in nested routes. entry point .js reactdom.render( <router history={hashhistory} > <route path="/" component={app}> <route path="models" component={content}> </route> </router>, document.getelementbyid('app') ); app.js render: function() { return ( <div> <header /> {this.props.children} </div> ); } so child of app content component sent in. i'm using flux , app.js has state , listens changes, don't know how pass state down this.props.children. before using react-router app.js defines children explicitly, passing state natural don't see how now. using couple of react helper methods can add state, props , whatever else this.props.children render: function() { var children = react.ch...
Read more

Excel VBA "Microsoft Windows Common Controls 6.0 (SP6)" Location Changes -

-
i have excel workbook used generate quotations customers. there main page user inputs data, , there buttons generate various pdfs , send them customer. however, 1 user consistently getting error preventing generating , sending pdfs. i beleive "microsoft windows common controls 6.0 (sp6)". it's installed on users' computers. on mine, location "c:\windows\syswow64\mscomctl.ocx" on others "c:\windows\system32\mscomctl.ocx" the user experiencing issues on 32-bit machine, "mscomctl.ocx" file should in system32. have manually put in there, , pointed common controls reference in vba it. issue seems keep reverting looking in syswow64. since folder doesn't exist, can't find it, , can't produce pdfs. i thought perhaps issue user running older version of office (2007) there users on 2013 , 2016. thought perhaps mixture of 64-bit , 32-bit users. user gets sent workbook other users (as quotation process goes further, gets passed ...
Read more