Getting 'Specified cast is not valid.' Error on MVC SqlDataReader - asp.net-mvc

Question

Please don't mark this as DUPLICATE QUESTION.
I've been trying to do follow all the answers I have found but I still get this error. Can anyone give me idea where this error came from ??
Here's the error
Server Error in '/NomsPR' Application.
Specified cast is not valid.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidCastException: Specified cast is not valid.
Source Error:
Line 36: while (reader.Read())
Line 37: {
Line 38: results.Add( new NomsPRItem()
Line 39: {
Line 40: RequestID = reader.GetInt32(0)
Source File: c:\SVN\branches\NomsPRMonitoring\NomsPRMonitoring\Models\CheckerConnection.cs Line: 38
Stack Trace:
[InvalidCastException: Specified cast is not valid.]
System.Data.SqlClient.SqlBuffer.get_Int32() +6639748
Lear.NomsPRMonitoring.Models.CheckerConnection.LoadPRItems(DateTime from, DateTime to) in c:\SVN\branches\NomsPRMonitoring\NomsPRMonitoring\Models\CheckerConnection.cs:38
Lear.NomsPRMonitoring.Controllers.CheckerController.GetList() in c:\SVN\branches\NomsPRMonitoring\NomsPRMonitoring\Controllers\CheckerController.cs:33
lambda_method(Closure , ControllerBase , Object[] ) +79
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +261
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +39
System.Web.Mvc.Async.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() +34
System.Web.Mvc.Async.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() +124
System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +838499
System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) +15
System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +33
System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +839052
System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +28
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +65
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +51
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +51
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +606
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288
Here is my model :
public class NomsPRItem
{
public long RequestID { get; set; }
public long PartID { get; set; }
public string PartNumber { get; set; }
public string PartDesc { get; set; }
public string UnitName { get; set; }
public double PartQuantity { get; set; }
public string CurrName { get; set; }
public double PiecePrice { get; set; }
public DateTime DeliveryDate { get; set; }
public string ProposeSuppliers { get; set; }
public string Comments { get; set; }
public long AccountTypeID { get; set; }
public string AccountType { get; set; }
public string InboxLearUID { get; set; }
public bool ReviewFlag { get; set; }
public long SubCatID { get; set; }
public string SubCatName { get; set; }
public DateTime CreateDate { get; set; }
public string CreateBy { get; set; }
public DateTime LastDate { get; set; }
public string LastBy { get; set; }
public string SupplierID { get; set; }
public string CostCenter { get; set; }
public long SubAccountTypeID { get; set; }
public string SubAccountType { get; set; }
public double TotalAmount { get; set; }
public double Amount { get; set; }
public string ItemId { get; set; }
public string FullName { get; set; }
}
}
And my connection
public static List<NomsPRItem> LoadPRItems(DateTime from, DateTime to)
{
string sSrcipt = m_sReport + "and p.[RequestDate] between '" + from.ToString("yyyy-MM-dd HH:mm:ss") + "' and '" + to.ToString("yyyy-MM-dd HH:mm:ss") + "'";
List<NomsPRItem> results = new List<NomsPRItem>();
using (SqlConnection con = new SqlConnection(m_sConnectionString))
{
con.Open();
using (SqlCommand command = new SqlCommand(sSrcipt, con))
{
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
results.Add( new NomsPRItem()
{
RequestID = reader.GetInt32(0)
,PartID = reader.GetInt32(15)
,PartDesc = reader.GetString(1)
,PartNumber = reader.GetString(7)
,SupplierID = reader.GetString(16)
,AccountType = reader.GetString(3)
,CurrName = reader.GetString(4)
,PartQuantity = (double)reader.GetDecimal(5)
,PiecePrice = (double)reader.GetDecimal(6)
,Amount = (double)reader.GetDecimal(5) * (double)reader.GetDecimal(6)
});
}
}
}
return results;
}
}
I am using angularjs in this, so I am converting this data to JSON ..
Here is my controller :
public JsonResult GetList()
{
DateTime today = DateTime.Now;
List<NomsPRItem> model = CheckerConnection.LoadPRItems(new DateTime(today.Year, today.Month, 1, 0, 0, 0), today);
return Json(model, JsonRequestBehavior.AllowGet);
}
public JsonResult GetReportList(string from, string to)
{
DateTime fromd = DateTime.Now;
DateTime tod = DateTime.Now;
if (from != "undefined")
fromd = Convert.ToDateTime(from);
if (to != "undefined")
tod = Convert.ToDateTime(to);
fromd = new DateTime(fromd.Year, fromd.Month, fromd.Day, 0, 0, 0);
tod = new DateTime(tod.Year, tod.Month, tod.Day, 23, 59, 59);
return Json(CheckerConnection.LoadPRItems(fromd, tod), JsonRequestBehavior.AllowGet);
}
I hope someone can help me on this mistake !

Answer 1

Your requestID is long and you are converting it to Int32.Change it to Int64 like this.
RequestID = reader.GetInt64(0)
,PartID = reader.GetInt64(15)