WCF / ASMX :: Return JSON Data From A 2.0 Web Service?
Sep 10, 2010
Just ramping up on JSON and JQuery and returning data to a ASP.NET web page from a web service using Ajax. The JQuery part is pretty straight-forward. However, when trying to return JSON formatted data instead of XML from a 2.0 web service, I'm stuck. The web service does have the System.Web.Script.Services.ScriptService attribute, so I can hit it via JavaScript; however, the web service always...always...returns data in XML format, no matter if I explicitly say I want JSON as the datatype in my JQuery code. So I don't know if this is an issue with the web service or the JQuery code. I posted this here, but realize that the category could be incorrect depending on where the issue is. Is there no way to return JSON data from a 2.0 web service? It's a production web service, so I can't change the code unfortunately.
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[Code]....
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[Code]....
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[code]....
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Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
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Inherits System.Web.Services.WebService
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<System.Web.Services.WebMethod()> _
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C#
class Test { static void Main() { HelloClient client = new HelloClient();
[Code]....
This is my Ajax-enabled WCF service code:
[Code]....
This is the web.config service model setting
[Code]....
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Code:
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{
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public static LoanSize[] GetLoanSize()
[Code] ....
This is how i read it in client size
Code:
function GetLoanSize() {
$.ajax({
type: "POST",
url: "Default.aspx/GetLoanSize",
data: "{}",
contentType: "application/json; charset=utf-8",
[Code] ....
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In our project WCF service is acting as our BLL.
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Added contract
[OperationContract]
dynamic GetReferenceTableData(string tableName);
method in service:
public dynamic GetReferenceTableData(string tableName)
{
try
{
dynamic tableData = ReferenceTableDAL.GetReferenceTableData(tableName);
return tableData;
}
catch (Exception ex)
{
throw;
}
}
method at DAL(ReferenceTableDAL):
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{
Database db = DatabaseFactory.CreateDatabase(Flags.ConnectionStringKey);
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objDynamic = new List<B>();
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{
objDynamic = new List<C>();
}
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{
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{
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objDynamic.Add((A)dataRow);
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}
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{
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{
objDynamic.Add((B)dataRow);
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{
foreach (DataRow dataRow in dsTableData.Tables[0].Rows)
{
objDynamic.Add((C)dataRow);
}
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}
catch (Exception ex)
{
throw;
}
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try
{
using (DataServiceRef.DataServiceClient petService = new DataServiceRef.DataServiceClient())
{
dynamic tableData = petService.GetReferenceTableData(tableName);
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}
}
catch (Exception ex)
{
throw;
}
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Message:The underlying connection was closed: The connection was closed unexpectedly.
Stack Trace: at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
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May 7, 2015
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Javascript
<script type = "text/javascript">
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PageMethods.GetSvgElements(OnSuccessSVGElements);
}
function OnSuccessSVGElements(response) {
[code]....
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function createSuccess(context) {
$get("result").innerHTML = context.get_data();
}
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{%>
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Feb 3, 2010
we have console-hosted WCF Service and ASP.NET WEB Service (on IIS).
After some tough operation WCF Service must return some data(large data) to ASP.NET Web Service for next processing. I tested on small results - everything is ok.
But after testing on real data(serialized result object is near 4.5 mb) error occurs on ASP.NET Web Service (which is client in wcf-client-server communication).
Messages size are configured by next binding (on server and client):
NetTcpBinding netTcpBinding = new NetTcpBinding();
netTcpBinding.TransactionFlow = true;
netTcpBinding.SendTimeout = new TimeSpan(0, 4,0, 0);
netTcpBinding.Security.Mode = SecurityMode.None;
[code]...
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