problem in returning datatable using wcf service in asp.net

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hello ...
i have a wcf service from which i am returning a data table . my code is ...

C#

[ServiceContract]
public interface IMyWCFService
{	
    [OperationContract]
    Student StudentRecord();
}

[DataContract]
public class Student
{
    [DataMember]
    public DataTable StudentTable
    {
        get;
        set;
    }
}

and the other file code is ...

C#

public Student StudentRecord()
{
    Student st = new Student();
    DataTable dt = new DataTable();
    SqlConnection con = new SqlConnection("data source=ggsys03 ; initial catalog=Test ; integrated security=true");

    SqlDataAdapter da = new SqlDataAdapter("select * from studentInfo", con);
    da.Fill(dt);
    st.StudentTable = dt;
    return st;

}

when i using this it gives error ...

C#

"An exception of type 'System.ServiceModel.CommunicationException' occurred in mscorlib.dll but was not handled in user code

Additional information: An error occurred while receiving the HTTP response to http://localhost:49314/MyWCFService.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details."

how to solve out this problem ...

Posted 4-Mar-14 20:28pm

GDdixit

Updated 4-Mar-14 23:51pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v2

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Raajkumar.b 5-Mar-14 4:19am

hi,
may be the problem is in web.config file
check this link once
http://realtimescenarios.blogspot.in/2013/05/wcf-communicationexception-this-could.html

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 5-Mar-14 5:55am

Modify the web.config to allow large data.

2 solutions

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Krunal Rohit · Answer 1 · 2014-03-04T20:30:00

Solution 1

Give a name to a DataTable Like new DataTable("Students");

-KR

Posted 4-Mar-14 20:30pm

Krunal Rohit

Comments

GDdixit 5-Mar-14 2:49am

ok , i will try this but the error is same yet ..

Krunal Rohit 5-Mar-14 8:56am

Okay tell me, why are you using DataTable here ? I mean if you've created DataContract, what's the use of it ?

-KR

Amalraj Ramesh · Answer 2 · 2014-03-05T00:07:00

use like this

first increase your bufferrecive size

verify this

https://stackoverflow.com/questions/5337412/buffer-size-in-wcf-service[^]

Still it happen do like this, i hope it ill work

CSS

[ServiceContract]
public interface IMyWCFService
{
    [OperationContract]
    DataTable StudentRecord();
}

//[DataContract]
//public class Student
//{
    //[DataMember]
    //public DataTable StudentTable
    //{
     //   get;
       // set;
    //}
//}

public DataTable StudentRecord()
{
//Student st = new Student();
DataTable dt = new DataTable();
SqlConnection con = new SqlConnection("data source=ggsys03 ; initial catalog=Test ; integrated security=true");

SqlDataAdapter da = new SqlDataAdapter("select * from studentInfo", con);
da.Fill(dt);
//st.StudentTable = dt;
return dt;

}