Passing JavaScript object to C# WCF service as Dictionary<string, object>

Question

I'm trying to pass JavaScript object to C# WCF service as Dictionary and I don't know how to do it...

I have a WCF service:

[OperationContract]
[WebInvoke]
public List<psy_trance_fm_genre> select(SortedDictionary<string, object> parameters)
{
    ...
}

And I have some JavaScript / JQuery code:

$.ajax({
    contentType: 'application/json; charset=utf-8',
    data: JSON.stringify({ '@genre': '', '@start_row_index': 0, '@maximum_rows': 100 }),
    error: function (jqXHR, textStatus, errorThrown) {
        ...
    },
    success: function (data, textStatus, jqXHR) {
        ...
    },
    type: 'POST',
    url: 'svc/psy_trance_fm_genres.svc/select'
});

Please help me to make them work together! Thanks in advance!

Do you really need the service to be a dictionary? That seems like it would be too open, too insecure, or too susceptible to ineffeciencies. I usually create a DTO for my services which would work great for your situation. — Jeff
– Jeff, Commented Jul 22, 2013 at 23:20
Jeff, can you, please, explain, how to use DTO to make web service and jquery work together in my case? — Vjacheslav Ravdin
– Vjacheslav Ravdin, Commented Jul 23, 2013 at 12:26
A DTO is basically just a custom class with the sole purpose of transferring data from one place to another. You would create whatever properties you need on that object and use that as your parameter in WCF e.g. public List<psy_trance_fm_genre> select(MyDTOClass params). You would need to give WCF a little help in figuring out how to serialize the class - msdn.microsoft.com/en-us/library/ms733811.aspx — Jeff
– Jeff, Commented Jul 23, 2013 at 14:08
Oh, that is what you were talking about... But why is it safer??? — Vjacheslav Ravdin
– Vjacheslav Ravdin, Commented Jul 23, 2013 at 15:14

PostureOfLearning · Accepted Answer · 2013-07-23 00:10:54Z

1

Maybe this will help you or put you in the right direction:

An example of an Ajax call I'm using:

    var data2Send = {
        "CategoryID": CatID, "AccountID": AccID, "RegionID": RegID, "PersonID": PerID, "BudgetID": BudID,
        "AccountDetailTypeID": AdtID
    }
//data2Send could also contain i.e. an array of arrays, list of lists, etc


    $.ajax({
        type: "GET",
        url: '../../Service/myservice.svc/GetAccountDetails',
        dataType: "json",
        data: data2Send,
        contentType: "application/json; charset=utf-8",
        success: function (data) { var accountDetails = JSON.parse(data.d); },
        error: function (jqXHR, textStatus, errorThrown) { alert(errorThrown); }
    });

The WCF contract:

    [WebInvoke(Method = "GET")]
    [OperationContract]
    string GetAccountDetails(int AccountID = 0, int RegionID = 0, int PersonID = 0, int CategoryID = 0, int BudgetID = 0, string AccountDetailTypeID = "");

Note that the the contract returns a string. I do this using:

        var accountDetailList = db.AccountDetails
            .Select(ad => new
            {
                AccountDetailTypeID = ad.AccountDetailTypeID,
                Reference = ad.Reference,
                Description = ad.Description,
        AccountDetailID = ad.AccountDetailID,
            })
            .ToList();

return JsonConvert.SerializeObject(accountDetailList);

I hope this helps.

answered Jul 23, 2013 at 0:10

PostureOfLearning

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1 Comment

Vjacheslav Ravdin Over a year ago

Sorry, but it is too complex. I'm sure there's a way to achieve my goal much easier...

Vjacheslav Ravdin · Accepted Answer · 2013-07-23 19:17:19Z

0

I decided to rewrite my service to use only strings and int as parameters.

As far as I understand, it's impossible to pass the dictionary in a simple straightforward way.

answered Jul 23, 2013 at 19:17

Vjacheslav Ravdin

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1 Comment

Vas Over a year ago

See stackoverflow.com/questions/15001755/…

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