CODEWITHSUNDEEP
jqueryajaxjsonasp.net-mvc-4
annoirq
annoirq

Reputation: 865

Send JSON to Server (ASP.NET MVC4)

I have JSON:

[{"id":1,"user_id":"8","project_id":"1","mode":3},{"id":1,"user_id":"8","project_id":"2","mode":1},{"id":1,"user_id":"8","project_id":"3","mode":1}]

So, I try to send it to server:

$.ajax({
            url : "User/Permissions_Set",
            dataType: 'json',
            type: 'POST',
            data: JSON.stringify(permissions_JSON),
            success: function (data) {
                console.log(data);
            }
        });

On Serverside:

[HttpPost]
        public void Permissions_Set(List<Permission> permissions_JSON)
        {

            foreach (var permission_from_view in permissions_JSON)
            {
                var permission_from_db = db.Permissions.Where(prm => prm.project_id == permission_from_view.project_id && prm.user_id == permission_from_view.user_id).FirstOrDefault();
                permission_from_db.mode = permission_from_view.mode;
            }

            db.SaveChanges();

        }

But I have error near "foreach": Object reference not set to an instance of an object.

I think problem with List permissions_JSON, but my model "Permission" has properties "id", "user_id", "project_id", "mode"

Please, advice, how I can recieve JSON from client on serverside.

Update:

Now I've changed jquery, and it return successfull result. But anyway I can't work with permissions_JSON. So, is it possible work with permissions_JSON not like "List", but like JSON. Could, you, please anybody advice how to recieve it, and work with it in C#...

Thanks in advance.

Upvotes: 0

Views: 931

Answers (1)

PaulBinder
PaulBinder

Reputation: 2052

Edit: Try doing it this way:

var bob = {permissions_JSON:[{ id: 1, user_id: 8, project_id: 1, mode: 3}]};
request.permissions_JSON = bob;

$.ajax({
    url: "Home/Permissions_Set",
    dataType: 'json',
    type: 'POST',
    contentType: 'application/json;',
    data: JSON.stringify(bob),
    success: function (data) {
        console.log(data);
    }
});

create a new object. Attach the collection to that object. Make sure the collection on the object as the same name as your parameter.

Upvotes: 1

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