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  • Christina 127 posts 390 karma points notactivated
    Nov 05, 2019 @ 13:11
    Christina
    0

    Populate a List in Viewmodel gets null when post from View -> Surfacecontroller

    Hi I have created a FormViewModel who contains a List.

    I populate the List on render and return the model to the partialview.

    The properties from list displays in the view, but when i post the FormViewModel back to Surfacecontroller the List is empty.

    Can someone point me in right direction.

    Thanks /Christina

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  • Ben Abbott 19 posts 124 karma points
    Nov 05, 2019 @ 13:37
    Ben Abbott
    0

    The data will only be sent to the surface controller if it's attached to a form element (textbox, dropdown etc). If you need the data sent to the surface controller, one option would be to store the data in a hidden input field

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  • Christina 127 posts 390 karma points notactivated
    Nov 05, 2019 @ 14:51
    Christina
    0

    Hi Ben Thank you for helping me. I generate the list dynamically and ID and name will be different. and I get the following error No parameterless constructor has been defined for this object. Im trying to save content from FormViewModel -> Model

    @for(int i = 0; i < Model.Allslopesform.Count(); i++)
{
    @Html.CheckBoxFor(m => m.Allslopesform[i].IsOpen) 
    @Model.Allslopesform[i].SlopeName
}

    generated html

    <input id="Allslopesform_0__IsOpen" name="Allslopesform[0].IsOpen" type="checkbox" value="true"><input name="Allslopesform[0].IsOpen" type="hidden" value="false"> slope1 ...and so on
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  • Ben Abbott 19 posts 124 karma points
    Nov 05, 2019 @ 16:36
    Ben Abbott
    0

    The 'No parameterless constructor has been defined for this object' error is usually thrown when a class is being serialised but can't (as it doesn't have a default constructor with no parameters)

    Is the type used for the 'Allslopesform' property a custom class and if so, does it have constructors?

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  • Christina 127 posts 390 karma points notactivated
    Nov 05, 2019 @ 18:55
    Christina
    0

    Many Thanks For helping me I figured it out, I had to populate an array

    /C

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