CODEWITHSUNDEEP
asp.net-mvcrazorasp.net-ajaxhtml-helper
Syrsyrian
Syrsyrian

Reputation: 35

Postback a single item on a Razor ListBoxFor

I have a ListBoxFor helper that is populated with users that have to be verified from a db. I click a single user and then click a submit button. This works fine and sets the admin verified bit in the db to true.

However what I am trying to do is on an item in the list being clicked, a value auto posted back and then I will fill a textarea with the users description. I gather I will use AJAX but have found it hard to get good documentation on using AJAX with HTMLHelpers in the this way.

EDIT: Updated the Model, View and Controller as per suggestions.

Model:

public class UserAdminVerifyModel
{
    public SelectList ToBeVerifiedAdmin { get; set; }
    public string[] SelectedUsers { get; set; }
    public List<string> userdesc { get; set; }
}

Controller:

    public ActionResult AdminVerifyListBox()
    {
        UserAdminVerifyModel verifusermodel = new UserAdminVerifyModel();
        verifusermodel.ToBeVerifiedAdmin = GetUsersToBeVerified();
        return View(verifusermodel);            
    }

View:

@using (Html.BeginForm("AdminVerifyListbox", "UserRegLog"))
{
@Html.ListBoxFor(x => x.SelectedUsers, Model.ToBeVerifiedAdmin)
<br /> 
<input type="submit" value="Submit" title="submit" />
}
}

Upvotes: 0

Views: 862

Answers (1)

Darin Dimitrov
Darin Dimitrov

Reputation: 1038710

ListBoxFor is used to generate a multiple selection list. This means that you should not be binding it to a simple string property. You should use an array of strings:

public class UserAdminVerifyModel
{
    public SelectList ToBeVerifiedAdmin { get; set; }
    public string[] SelectedUsers { get; set; }
    public List<string> userdesc { get; set; }
}

and in the view bind the ListBoxFor to the SelectedUsers collection property:

@using (Html.BeginForm("AdminVerifyListbox", "UserRegLog"))
{
    @Html.ListBoxFor(x => x.SelectedUsers, Model.ToBeVerifiedAdmin)
    <br /> 
    <input type="submit" value="Submit" title="submit" />
}

Also your ToBeVerifiedAdmin is already a SelectList. You should not be calling the constructor once again in your view. This should be done in your controller action which is responsible for populating this ToBeVerifiedAdmin property from wherever your information is stored.

Upvotes: 1

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