Why mvc Html.HiddenFor does not render my field?












16















I'm trying to do this simple thing



<%= Html.HiddenFor(model => model.Id)%>


the model is



[HiddenInput(DisplayValue=true)]
public int Id { get; set; }


but i always get this rendered



<input type="hidden" value="0" name="UserInfo.Id" id="UserInfo_Id">


i've check and the id is NOT 0.. ?!



need some explanation here...



Edit



The problem seem's to be the post thing mentionned below.
This is working



<input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />


Thanks to Manaf










share|improve this question

























  • what happens when you put the same field in a normal textboxfor?

    – Stefanvds
    Aug 31 '10 at 12:35
















16















I'm trying to do this simple thing



<%= Html.HiddenFor(model => model.Id)%>


the model is



[HiddenInput(DisplayValue=true)]
public int Id { get; set; }


but i always get this rendered



<input type="hidden" value="0" name="UserInfo.Id" id="UserInfo_Id">


i've check and the id is NOT 0.. ?!



need some explanation here...



Edit



The problem seem's to be the post thing mentionned below.
This is working



<input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />


Thanks to Manaf










share|improve this question

























  • what happens when you put the same field in a normal textboxfor?

    – Stefanvds
    Aug 31 '10 at 12:35














16












16








16


5






I'm trying to do this simple thing



<%= Html.HiddenFor(model => model.Id)%>


the model is



[HiddenInput(DisplayValue=true)]
public int Id { get; set; }


but i always get this rendered



<input type="hidden" value="0" name="UserInfo.Id" id="UserInfo_Id">


i've check and the id is NOT 0.. ?!



need some explanation here...



Edit



The problem seem's to be the post thing mentionned below.
This is working



<input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />


Thanks to Manaf










share|improve this question
















I'm trying to do this simple thing



<%= Html.HiddenFor(model => model.Id)%>


the model is



[HiddenInput(DisplayValue=true)]
public int Id { get; set; }


but i always get this rendered



<input type="hidden" value="0" name="UserInfo.Id" id="UserInfo_Id">


i've check and the id is NOT 0.. ?!



need some explanation here...



Edit



The problem seem's to be the post thing mentionned below.
This is working



<input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />


Thanks to Manaf







asp.net-mvc-2






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Sep 5 '10 at 22:43







mateo

















asked Aug 31 '10 at 4:44









mateomateo

2641411




2641411













  • what happens when you put the same field in a normal textboxfor?

    – Stefanvds
    Aug 31 '10 at 12:35



















  • what happens when you put the same field in a normal textboxfor?

    – Stefanvds
    Aug 31 '10 at 12:35

















what happens when you put the same field in a normal textboxfor?

– Stefanvds
Aug 31 '10 at 12:35





what happens when you put the same field in a normal textboxfor?

– Stefanvds
Aug 31 '10 at 12:35












4 Answers
4






active

oldest

votes


















23














I'm not sure if this is the case with you but the Html.HiddenFor() "do not output correct values after a post if the value is changed during the post." and this is a not a bug it was designed that way.



Quick Fix :



Don't use the helper, try this instead :



<input type="hidden" value="<%= Html.AttributeEncode(model.Id) %>" id="Id" name="Id" />


Always worked for me :)






share|improve this answer


























  • Thanks that was the case.

    – mateo
    Sep 5 '10 at 20:30






  • 1





    in fact we should do this to handle complex model <input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />

    – mateo
    Sep 5 '10 at 22:41











  • Glad i could help :)

    – Manaf Abu.Rous
    Sep 6 '10 at 1:06






  • 3





    Apparently it's not a bug. Unfortunately it's something I keep getting caught on :( The other option is to have a ModelState.Clear(); call in your controller action.

    – Darren Oster
    Nov 28 '12 at 4:11











  • Anybody have any idea on why it was designed this way, if it's not a bug?

    – gb2d
    Jun 26 '13 at 9:59



















5














To add to Manaf's correct answer--you note correctly that the problem occurs in controller actions that handle posts. I was getting the same problem in a controller action that handles a get when I explicitly pass a model to a view:



[HttpGet]
ActionResult SearchForSomething(SearchForm searchForm)
{
searchForm.MyId = SomeValueFromSession;
return View("SearchForSomething", searchForm);
}


In the view, this line that rendered a hidden input for MyId always rendered "0":



@Html.HiddenFor(m => m.MyId);


Per Darren Oster's suggestion I changed to the following and fixed the problem:



[HttpGet]
ActionResult SearchForSomething(SearchForm searchForm)
{
searchForm.MyId = SomeValueFromSession;
ModelState.Clear();
return View("SearchForSomething", searchForm);
}





share|improve this answer
























  • Both the normal <input> tag and ModelState.Clear() work for me, but I find it clearer to use the latter (with the proper comment ofr my followers) than mixing @Html.xxx and input tags in my views...

    – Fred Mauroy
    Aug 14 '18 at 8:58



















0














My comment is relegated to the last place (even I couldn't find it), so:



In case you don't want to clear the modelstate, as Darren Oster suggested, removing the problematic key worked for me: ModelState.Remove("HiddenKey")






share|improve this answer































    0














    I ran into this problem as well with @Html.HiddenFor.



    @Html.Hidden("Id", Model.Id) also gave value 0, but a foreign key field, e.g., @Html.Hidden("Model_Category_ModelId", Model.Category.ModelId) did work, while it @Html.HiddenFor(m => m.Category.ModelId) did not.



    My solution was to redirect to the get action, as described in ASP NET MVC Post Redirect Get Pattern.






    share|improve this answer























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      4 Answers
      4






      active

      oldest

      votes








      4 Answers
      4






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      23














      I'm not sure if this is the case with you but the Html.HiddenFor() "do not output correct values after a post if the value is changed during the post." and this is a not a bug it was designed that way.



      Quick Fix :



      Don't use the helper, try this instead :



      <input type="hidden" value="<%= Html.AttributeEncode(model.Id) %>" id="Id" name="Id" />


      Always worked for me :)






      share|improve this answer


























      • Thanks that was the case.

        – mateo
        Sep 5 '10 at 20:30






      • 1





        in fact we should do this to handle complex model <input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />

        – mateo
        Sep 5 '10 at 22:41











      • Glad i could help :)

        – Manaf Abu.Rous
        Sep 6 '10 at 1:06






      • 3





        Apparently it's not a bug. Unfortunately it's something I keep getting caught on :( The other option is to have a ModelState.Clear(); call in your controller action.

        – Darren Oster
        Nov 28 '12 at 4:11











      • Anybody have any idea on why it was designed this way, if it's not a bug?

        – gb2d
        Jun 26 '13 at 9:59
















      23














      I'm not sure if this is the case with you but the Html.HiddenFor() "do not output correct values after a post if the value is changed during the post." and this is a not a bug it was designed that way.



      Quick Fix :



      Don't use the helper, try this instead :



      <input type="hidden" value="<%= Html.AttributeEncode(model.Id) %>" id="Id" name="Id" />


      Always worked for me :)






      share|improve this answer


























      • Thanks that was the case.

        – mateo
        Sep 5 '10 at 20:30






      • 1





        in fact we should do this to handle complex model <input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />

        – mateo
        Sep 5 '10 at 22:41











      • Glad i could help :)

        – Manaf Abu.Rous
        Sep 6 '10 at 1:06






      • 3





        Apparently it's not a bug. Unfortunately it's something I keep getting caught on :( The other option is to have a ModelState.Clear(); call in your controller action.

        – Darren Oster
        Nov 28 '12 at 4:11











      • Anybody have any idea on why it was designed this way, if it's not a bug?

        – gb2d
        Jun 26 '13 at 9:59














      23












      23








      23







      I'm not sure if this is the case with you but the Html.HiddenFor() "do not output correct values after a post if the value is changed during the post." and this is a not a bug it was designed that way.



      Quick Fix :



      Don't use the helper, try this instead :



      <input type="hidden" value="<%= Html.AttributeEncode(model.Id) %>" id="Id" name="Id" />


      Always worked for me :)






      share|improve this answer















      I'm not sure if this is the case with you but the Html.HiddenFor() "do not output correct values after a post if the value is changed during the post." and this is a not a bug it was designed that way.



      Quick Fix :



      Don't use the helper, try this instead :



      <input type="hidden" value="<%= Html.AttributeEncode(model.Id) %>" id="Id" name="Id" />


      Always worked for me :)







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited Nov 15 '18 at 20:35









      Joel

      17.1k25481




      17.1k25481










      answered Aug 31 '10 at 8:10









      Manaf Abu.RousManaf Abu.Rous

      2,1371723




      2,1371723













      • Thanks that was the case.

        – mateo
        Sep 5 '10 at 20:30






      • 1





        in fact we should do this to handle complex model <input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />

        – mateo
        Sep 5 '10 at 22:41











      • Glad i could help :)

        – Manaf Abu.Rous
        Sep 6 '10 at 1:06






      • 3





        Apparently it's not a bug. Unfortunately it's something I keep getting caught on :( The other option is to have a ModelState.Clear(); call in your controller action.

        – Darren Oster
        Nov 28 '12 at 4:11











      • Anybody have any idea on why it was designed this way, if it's not a bug?

        – gb2d
        Jun 26 '13 at 9:59



















      • Thanks that was the case.

        – mateo
        Sep 5 '10 at 20:30






      • 1





        in fact we should do this to handle complex model <input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />

        – mateo
        Sep 5 '10 at 22:41











      • Glad i could help :)

        – Manaf Abu.Rous
        Sep 6 '10 at 1:06






      • 3





        Apparently it's not a bug. Unfortunately it's something I keep getting caught on :( The other option is to have a ModelState.Clear(); call in your controller action.

        – Darren Oster
        Nov 28 '12 at 4:11











      • Anybody have any idea on why it was designed this way, if it's not a bug?

        – gb2d
        Jun 26 '13 at 9:59

















      Thanks that was the case.

      – mateo
      Sep 5 '10 at 20:30





      Thanks that was the case.

      – mateo
      Sep 5 '10 at 20:30




      1




      1





      in fact we should do this to handle complex model <input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />

      – mateo
      Sep 5 '10 at 22:41





      in fact we should do this to handle complex model <input type="hidden" value="<%= Html.AttributeEncode(Model.Id) %>" id="<%= Html.IdFor(model=>model.Id)%>" name="<%= Html.NameFor(model=>model.Id)%>" />

      – mateo
      Sep 5 '10 at 22:41













      Glad i could help :)

      – Manaf Abu.Rous
      Sep 6 '10 at 1:06





      Glad i could help :)

      – Manaf Abu.Rous
      Sep 6 '10 at 1:06




      3




      3





      Apparently it's not a bug. Unfortunately it's something I keep getting caught on :( The other option is to have a ModelState.Clear(); call in your controller action.

      – Darren Oster
      Nov 28 '12 at 4:11





      Apparently it's not a bug. Unfortunately it's something I keep getting caught on :( The other option is to have a ModelState.Clear(); call in your controller action.

      – Darren Oster
      Nov 28 '12 at 4:11













      Anybody have any idea on why it was designed this way, if it's not a bug?

      – gb2d
      Jun 26 '13 at 9:59





      Anybody have any idea on why it was designed this way, if it's not a bug?

      – gb2d
      Jun 26 '13 at 9:59













      5














      To add to Manaf's correct answer--you note correctly that the problem occurs in controller actions that handle posts. I was getting the same problem in a controller action that handles a get when I explicitly pass a model to a view:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      return View("SearchForSomething", searchForm);
      }


      In the view, this line that rendered a hidden input for MyId always rendered "0":



      @Html.HiddenFor(m => m.MyId);


      Per Darren Oster's suggestion I changed to the following and fixed the problem:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      ModelState.Clear();
      return View("SearchForSomething", searchForm);
      }





      share|improve this answer
























      • Both the normal <input> tag and ModelState.Clear() work for me, but I find it clearer to use the latter (with the proper comment ofr my followers) than mixing @Html.xxx and input tags in my views...

        – Fred Mauroy
        Aug 14 '18 at 8:58
















      5














      To add to Manaf's correct answer--you note correctly that the problem occurs in controller actions that handle posts. I was getting the same problem in a controller action that handles a get when I explicitly pass a model to a view:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      return View("SearchForSomething", searchForm);
      }


      In the view, this line that rendered a hidden input for MyId always rendered "0":



      @Html.HiddenFor(m => m.MyId);


      Per Darren Oster's suggestion I changed to the following and fixed the problem:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      ModelState.Clear();
      return View("SearchForSomething", searchForm);
      }





      share|improve this answer
























      • Both the normal <input> tag and ModelState.Clear() work for me, but I find it clearer to use the latter (with the proper comment ofr my followers) than mixing @Html.xxx and input tags in my views...

        – Fred Mauroy
        Aug 14 '18 at 8:58














      5












      5








      5







      To add to Manaf's correct answer--you note correctly that the problem occurs in controller actions that handle posts. I was getting the same problem in a controller action that handles a get when I explicitly pass a model to a view:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      return View("SearchForSomething", searchForm);
      }


      In the view, this line that rendered a hidden input for MyId always rendered "0":



      @Html.HiddenFor(m => m.MyId);


      Per Darren Oster's suggestion I changed to the following and fixed the problem:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      ModelState.Clear();
      return View("SearchForSomething", searchForm);
      }





      share|improve this answer













      To add to Manaf's correct answer--you note correctly that the problem occurs in controller actions that handle posts. I was getting the same problem in a controller action that handles a get when I explicitly pass a model to a view:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      return View("SearchForSomething", searchForm);
      }


      In the view, this line that rendered a hidden input for MyId always rendered "0":



      @Html.HiddenFor(m => m.MyId);


      Per Darren Oster's suggestion I changed to the following and fixed the problem:



      [HttpGet]
      ActionResult SearchForSomething(SearchForm searchForm)
      {
      searchForm.MyId = SomeValueFromSession;
      ModelState.Clear();
      return View("SearchForSomething", searchForm);
      }






      share|improve this answer












      share|improve this answer



      share|improve this answer










      answered Feb 7 '14 at 15:05









      Tom ReganTom Regan

      1,40412339




      1,40412339













      • Both the normal <input> tag and ModelState.Clear() work for me, but I find it clearer to use the latter (with the proper comment ofr my followers) than mixing @Html.xxx and input tags in my views...

        – Fred Mauroy
        Aug 14 '18 at 8:58



















      • Both the normal <input> tag and ModelState.Clear() work for me, but I find it clearer to use the latter (with the proper comment ofr my followers) than mixing @Html.xxx and input tags in my views...

        – Fred Mauroy
        Aug 14 '18 at 8:58

















      Both the normal <input> tag and ModelState.Clear() work for me, but I find it clearer to use the latter (with the proper comment ofr my followers) than mixing @Html.xxx and input tags in my views...

      – Fred Mauroy
      Aug 14 '18 at 8:58





      Both the normal <input> tag and ModelState.Clear() work for me, but I find it clearer to use the latter (with the proper comment ofr my followers) than mixing @Html.xxx and input tags in my views...

      – Fred Mauroy
      Aug 14 '18 at 8:58











      0














      My comment is relegated to the last place (even I couldn't find it), so:



      In case you don't want to clear the modelstate, as Darren Oster suggested, removing the problematic key worked for me: ModelState.Remove("HiddenKey")






      share|improve this answer




























        0














        My comment is relegated to the last place (even I couldn't find it), so:



        In case you don't want to clear the modelstate, as Darren Oster suggested, removing the problematic key worked for me: ModelState.Remove("HiddenKey")






        share|improve this answer


























          0












          0








          0







          My comment is relegated to the last place (even I couldn't find it), so:



          In case you don't want to clear the modelstate, as Darren Oster suggested, removing the problematic key worked for me: ModelState.Remove("HiddenKey")






          share|improve this answer













          My comment is relegated to the last place (even I couldn't find it), so:



          In case you don't want to clear the modelstate, as Darren Oster suggested, removing the problematic key worked for me: ModelState.Remove("HiddenKey")







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Jul 16 '15 at 19:50









          DavidCDavidC

          4161017




          4161017























              0














              I ran into this problem as well with @Html.HiddenFor.



              @Html.Hidden("Id", Model.Id) also gave value 0, but a foreign key field, e.g., @Html.Hidden("Model_Category_ModelId", Model.Category.ModelId) did work, while it @Html.HiddenFor(m => m.Category.ModelId) did not.



              My solution was to redirect to the get action, as described in ASP NET MVC Post Redirect Get Pattern.






              share|improve this answer




























                0














                I ran into this problem as well with @Html.HiddenFor.



                @Html.Hidden("Id", Model.Id) also gave value 0, but a foreign key field, e.g., @Html.Hidden("Model_Category_ModelId", Model.Category.ModelId) did work, while it @Html.HiddenFor(m => m.Category.ModelId) did not.



                My solution was to redirect to the get action, as described in ASP NET MVC Post Redirect Get Pattern.






                share|improve this answer


























                  0












                  0








                  0







                  I ran into this problem as well with @Html.HiddenFor.



                  @Html.Hidden("Id", Model.Id) also gave value 0, but a foreign key field, e.g., @Html.Hidden("Model_Category_ModelId", Model.Category.ModelId) did work, while it @Html.HiddenFor(m => m.Category.ModelId) did not.



                  My solution was to redirect to the get action, as described in ASP NET MVC Post Redirect Get Pattern.






                  share|improve this answer













                  I ran into this problem as well with @Html.HiddenFor.



                  @Html.Hidden("Id", Model.Id) also gave value 0, but a foreign key field, e.g., @Html.Hidden("Model_Category_ModelId", Model.Category.ModelId) did work, while it @Html.HiddenFor(m => m.Category.ModelId) did not.



                  My solution was to redirect to the get action, as described in ASP NET MVC Post Redirect Get Pattern.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Aug 13 '15 at 9:55









                  R. SchreursR. Schreurs

                  3,74232943




                  3,74232943






























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