c# - MVC Updating related data -


this question has answer here:

i have many-to-many relationship 3 tables. employee, history , title. history-table contains timespan , relationship both employee , title.

in end want able edit both timespan , title each employee common view. in employeecontroller.cs i've got code when submit form. 

[httppost, actionname("edit")] [validateantiforgerytoken] public actionresult edit(employee empl) // note: have no bindings here, either. should i?     if (modelstate.isvalid)     {         db.entry(empl).state = entitystate.modified;         db.savechanges();         return redirecttoaction("index");     }      return view(empl); }

but object empl doesn't have in it's histories-collection. says count = 0. how can include both history (and later title-table) can update that, too?

some of employee.cs:

public partial class employee {     public employee()     {         this.histories = new hashset<histories>();     }     public virtual icollection<histories> histories { get; set; } }

for reference, shows correctly in edit.cshtml employee:

<table class="table"> <tr>     <th>start date</th>     <th>end date</th>     <th>title</th> </tr> @foreach (var item in model.histories.orderbydescending(x => x.fromdate)) {     <tr>         <td>             @html.editorfor(modelitem => item.fromdate)         </td>         <td>             @html.editorfor(modelitem => item.todate)         </td>         <td>             @html.editorfor(modelitem => item.title.title)         </td>     </tr> } </table>

if more info needed, feel free ask, , sorry typos. had translate class names english you'll understand better.

use seomthing this:

            (int = 0; <  model.histories.orderbydescending(x => x.fromdate).count(); i++)             {                 <tr>                     <td>                         @html.hiddenfor(modelitem => model.histories[i].fromdate)                                                     @html.editorfor(modelitem => model.histories[i].fromdate)                                                 </td>                     <td>                         @html.hiddenfor(modelitem => model.histories[i].todate)                                                     @html.editorfor(modelitem => model.histories[i].todate)                        </td>                     <td style="text-align: center">                         @html.hiddenfor(modelitem => model.histories[i].title.title)                                                     @html.editorfor(modelitem => model.histories[i].title.title)                                                  </td>                 </tr>             }

Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more