Invalid json returned from aspx page in response to a Client side Ajax call

EDN Admin · Sep 15, 2012

Hi Experts,
I have come across an issue in which I am unable to serialize the Object To Json from the aspx page in reponse to a Client Side Ajax Call..
The code is like this:-
 
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd 
 
<html xmlns="http://www.w3.org/1999/xhtml 
<head runat="server 
<title>Json Demo</title> 
<script type="text/javascript" src="Scripts/jquery-1.4.1.js </script> 
<script type="text/javascript" language="javascript 
function GetCust() { 
$.ajax( 
{ 
type: "GET", 
//contentType: "application/json; charset=utf-8", 
data: { id: 5 }, 
url: "CustomerJson.aspx", 
dataType: "json", 
success: function (data) { 
alert("FirstName:" + data.d[0].FirstName + " LastName:" + data.d[0].LastName); 
}, 
error: function (xhr, status, error) { 
alert(Error Occured:+error); 
} 
 
}); 
} 
</script> 
</head> 
<body onload="GetCust() 
<form id="form1" runat="server 
 
 
 
</form> 
</body> 
</html>


{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
 
Response.ContentType = "application/json"; 
var cust = new Customer 
{ 
ID = (Request["id"] == null ? 0 : int.Parse(Request["id"])), 
FirstName = "Nilanjan", 
LastName = "Dutta" 
}; 

/ // System.Web.Script.Serialization.JavaScriptSerializer oSerializer = 
//new System.Web.Script.Serialization.JavaScriptSerializer(); 
// string sJSON = oSerializer.Serialize(cust); 
// byte[] array = Encoding.ASCII.GetBytes(sJSON); 
// Response.OutputStream.Write(array, 0, array.Length); 
 
var ser = new DataContractJsonSerializer(typeof(Customer)); 
ser.WriteObject(Response.OutputStream, cust); 
 
} 
}

 
public class Customer 
{ 
public int ID { get; set; } 
public string FirstName { get; set; } 
public string LastName { get; set; } 
 
} 
}
Although Id=5 is properly accessed in the code I am unable to get the Json Back..I am constantly getting this error in the error Callback:
ErrorOccured:Invalid JSON:
{"FirstName":"Nilanjan","ID":"5","LastName":"Dutta"}.
Please help. Thanks in advance

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Invalid json returned from aspx page in response to a Client side Ajax call

EDN Admin

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