check the checkbox based on model in mvc?

Question

I have a edit form which should have checkbox.

My Model for the page is

public class MyModel{
   public string Name {get;set;}
   public List<AdType> AdTypeList { get; set; }
}


Enum AdType{
  [Display(Name = "None")]
        None,

        [Display(Name = "Additional")]
        Additional_Photo,
}

So i have to check the check box with respect to the data coming from the database. And also update should happen if i make changes and submit. To work that way what changes i need to make in my html helper for the checkbox?

foreach (AdType role in Enum.GetValues(typeof(AdType)))
{
    <label>
        <input name="Roles" type="checkbox" value="@role" checked="@(Model != null)" />
        @{var x = EHelper.GetDisplayValue<AdType>(role);}
        @x
    </label>
}

I am new to mvc, please parden if i m doing something stupid.

checked="true" or checked="false" or checked="anythingAtAll" all mean the same thing - that the checkbox will be checked - its the presence of the attribute that determines if its checked. — user3559349
– user3559349, Commented Oct 18, 2017 at 6:51
Suggest you look at this answer for how to generate a strongly typed view for this — user3559349
– user3559349, Commented Oct 18, 2017 at 6:52
i want to do it using foreach. but from ur link, i didnt get any solution @stephen — hilda_sonica_vish
– hilda_sonica_vish, Commented Oct 18, 2017 at 7:10
You have an enum and you want to select multiple values, therefore it should be [Flags] (having List<AdType> is not the correct approach) In any case, your checkbox has name="Roles" which wont bind to your model. — user3559349
– user3559349, Commented Oct 18, 2017 at 7:14
And its not clear why you would want to select both None and Additional_Photo anyway — user3559349
– user3559349, Commented Oct 18, 2017 at 7:16

Dhaval Pankhaniya · Accepted Answer · 2017-10-18 07:18:12Z

1

you can put if else condition in model to create condition based html control

foreach (AdType role in Enum.GetValues(typeof(AdType)))
{
    <label>
        @if(Model != null)
        {
            <input name="Roles" type="checkbox" value="@role" checked="checked" />
        }
        else
        {
            <input name="Roles" type="checkbox" value="@role" />
        }
        @{var x = EHelper.GetDisplayValue<AdType>(role);}
        @x
    </label>
}

answered Oct 18, 2017 at 7:18

Dhaval Pankhaniya

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2 Comments

hilda_sonica_vish Over a year ago

Stephen mentions, i wnt be able to bind it to model with name=Roles

user3559349 Over a year ago

@hildasonica, It will if you add a property List<AdType> Roles (but as I noted previously, your approach makes no sense)

hilda_sonica_vish · Accepted Answer · 2017-10-20 03:44:46Z

1

@foreach (AdType role in Enum.GetValues(typeof(AdType)))
                            {
                            <label  class="col-sm-12">
                                <input name="AdTypeList" type="checkbox" value="@role" checked="@(Model != null && Model.AdTypeList!= null && Model.AdTypeList.Any(i => i.HasFlag(role)))" />
                                @{var text = EHelper.GetDisplayValue<AdType>(role);}
                                @text
                            </label>
                            }

answered Oct 20, 2017 at 3:44

hilda_sonica_vish

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1 Comment

hilda_sonica_vish Over a year ago

@stephen, Now its fine ryt?

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