I have a Web Api 2 Service and a WPF OData Client and I am working with Crystal Reports.
I have two tables( Teacher, Subject ) having One-to-Many relationship between them. I am trying to get Subjects against Teacher_Id.
Following is the code that I am using:
private string ServiceUri = "http://localhost:50623/odata";
private void pge_TeacherReportPage_Loaded(object sender, RoutedEventArgs e)
{
var Container = new Default.Container(new Uri(ServiceUri));
ReportDocument report = new ReportDocument();
report.Load("../../TeacherCrystalReport.rpt");
var Teacher = from c in Container.Teachers
select new
{
Name = c.Name,
FatherName = c.FatherName,
ContactNo = c.ContactNo,
Address = c.Address,
Religion = c.Religion,
CNIC = c.CNIC,
Status = c.Status,
UserName = c.UserName,
Subjects = c.Subjects.Where(s=> s.Teacher_Id == c.Teacher_Id).SingleOrDefault()
};
report.SetDataSource(Teacher);
rpt_Teacher.ViewerCore.ReportSource = report;
}
But I am unable to do so as I am getting the Following Exception:
An unhandled exception of type 'System.NotSupportedException' occurred in Microsoft.OData.Client.dll
Additional information: Constructing or initializing instances of the type <>f__AnonymousType1`9[System.String,System.String,System.String,System.String,System.String,System.String,System.String,System.String,QuizSystemClient.RestApiOData.Models.Subject] with the expression c.Subjects.Where(s => (s.Teacher_Id == c.Teacher_Id)).SingleOrDefault() is not supported.
Please tell me how can I resolve that?
My problem is solved, I had made the following changes in my code.
var Teacher = from c in Container.Teachers
select new
{
Name = c.Name,
FatherName = c.FatherName,
ContactNo = c.ContactNo,
Address = c.Address,
Religion = c.Religion,
CNIC = c.CNIC,
Status = c.Status,
UserName = c.UserName,
//I had made changes in the following code:
Subjects = c.Subjects.Select(s=>s.Subject_Name).FirstOrDefault()
};