CODEWITHSUNDEEP
c#asp.net-mvclinq
Uzair Nadeem
Uzair Nadeem

Reputation: 745

Show buttons on a partial view based on some query

I am showing search results same as searching groups on facebook enter image description here

I have a relationship Table named CommunityUser in Database having attributes CommunityID and UserID.

Using Partial View I want to show if User not already joined that Community/Group that it will show Join Button else if user already joined that community it will show Leave button.

I have written IsMember() function in my controller that takes two parameters, CommunityID and UserID. This will return true if that Community ID exist against that user ID.

        public bool IsMember(string UserID, int CommunityID) {

        var Membership = db.Users.Include(x => x.CommunityUsers).Where(s => s.Id.Equals(UserID)).Count();

        if(Membership>0)
        return true;
        else
        return false;

    }

Now what I actually need is, I want to call this function in an IF condition on my view class. It is not allowing me to call this function on my view Class.

@if (){

<button>@Html.ActionLink("Leave", "LeaveCommunity", new { id = ViewBag.ComID })</button>

}
else
{
<button>@Html.ActionLink("Join", "joinCommunity", new { id = ViewBag.ComID })</button>

}

Upvotes: 1

Views: 60

Answers (1)

Mantas Čekanauskas
Mantas Čekanauskas

Reputation: 2228

In your controller you should have a method which will return this view. So in this method you call this function

public ActionResult Index(string UserID, int CommunityID)
{
    var hasMembership = IsMember(serID, CommunityID);
    return View(hasMembership);
}

In the View it self then you just grab this variable hasMembership you just passed from @model.

@if (Model){
    <button>@Html.ActionLink("Leave", "LeaveCommunity", new { id = ViewBag.ComID })</button>
}
else
{
    <button>@Html.ActionLink("Join", "joinCommunity", new { id = ViewBag.ComID })</button>
}

Note: it might be wise to create some DTO class for passing data to a view, because you might need to pass multiple value to a view at some point. Plus the whole condition would be more readable

public SomeDTO {
    public bool IsMember {get;set}
    public List<Community> Communities {get;set;}
}

public ActionResult Index(string UserID, int CommunityID)
{
    var hasMembership = IsMember(serID, CommunityID);
    var listOfCommunities = _repo.GetComunities();

    var dto = new SomeDTO
    {
        IsMember = hasMembership,
        Communities = listOfCommunities
    }
    return View(dto);
}

@if (Model.IsMember){
    // do or do not something
}

Upvotes: 1

Related Questions