Could not bind jSON to parameters : The Official Microsoft ASP.NET Forums

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fahadash

Member

73 Points

80 Posts

Could not bind jSON to parameters

Jan 16, 2013 05:31 PM|LINK

Hi,
I have a simple method with the following signature in my Controller class

[HttpPost]
        public object LogIn(string username, string password)

I am using the following JS to make the call

                var params = JSON.stringify({ username: "abc", password: "def" });
                $.post($("#serviceurl").val(), params, function (data, textStatus, jqXHR) {
                    alert("Completed : " + textStatus);}, "application/json");

I searched on google and figured a lot of samples are using Single parameter binding to I created the following model and changed the signature of my method to

        public class LogInParams
        {
            public string username { get; set; }
            public string password { get; set; }
        }

      [HttpPost]
        public object LogIn(LogInParams par)

Now the above method gets called and par is some object but the properties are null.

Can someone point me in to the right direction here ?

Thanks

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Rion William...

All-Star

27656 Points

4574 Posts

Re: Could not bind jSON to parameters

Jan 16, 2013 05:38 PM|LINK

Your parameters are already in JSON format so you don't need to use the JSON.Stringify() method.

Just pass in your existing params variable like shown below :

var params = { username: "abc", password: "def" };
$.post($("#serviceurl").val(), params, function (data, textStatus, jqXHR) {
        alert("Completed : " + textStatus);
}, "application/json");

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Edited by Rion Williams on Jan 16, 2013 05:39 PM
Edited by Rion Williams on Jan 16, 2013 05:40 PM
Edited by Rion Williams on Jan 16, 2013 05:40 PM
Edited by Rion Williams on Jan 16, 2013 05:41 PM

Reply

fahadash

Member

73 Points

80 Posts

Re: Could not bind jSON to parameters

Jan 16, 2013 05:41 PM|LINK

Rion,
Still does'nt work. The username and password properties are still null.

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Rion William...

All-Star

27656 Points

4574 Posts

Re: Could not bind jSON to parameters

Jan 16, 2013 05:49 PM|LINK

Can you post some additional code? I created an example on my machine of this same functionality and it seemed to work just fine.

Examples :

Javascript :

<script type='text/javascript'>
    $(document).ready(function () {
        var params = { username: "abc", password: "def" };
        $.post("/Default/LogIn", params, function (data, textStatus, jqXHR) {
            alert("Completed : " + textStatus);
        }, "application/json");
    });
</script>

Controller Action :

[HttpPost]
public object LogIn(string username, string password)
{
      return "Testing";
}

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Edited by Rion Williams on Jan 16, 2013 05:51 PM

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stockcer

Member

498 Points

128 Posts

Re: Could not bind jSON to parameters

Jan 16, 2013 05:55 PM|LINK

Follow this example.... (Do not forget to mark when the answer is found)

var General = {
            HaveTools: $('#chkTools').is(':checked'),
            Convicted: $('#chkFelony').is(':checked'),
            Citizen: $('#chkCitizen').is(':checked'),
            Available: $('#DateAvailable').val(),
            Phone_Cell: $('#txtPhoneCell').val(),
            Phone_home: $('#txtPhoneHome').val(),
.....

                data: JSON.stringify(General),
......

...API Code...

Public Function PostValue(ByVal General As Applications.General) As HttpResponseMessage



..Class....
 Public Class General
        Public Property HaveTools As Boolean
        Public Property Convicted As Boolean
        Public Property Citizen As Boolean
        Public Property Available As Date
        Public Property Phone_Cell As String
        Public Property Phone_Home As String
 End Class

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