Server Error in '/' Application.

Object reference not set to an instance of an object.

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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 1708:	DataRow dr = dtCart.Rows[nRow];
Line 1709:	double dPrice = 0; 
Line 1710:	double dRetailPrice = double.Parse(drp["price"].ToString());
Line 1711:	if(dr["used"].ToString() != "1")
Line 1712:	{

Source File: c:\WMS\ITERA_1_0\ik\cs\cart.cs Line: 1710

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   ASP.cart_aspx.PrintOneRow(Boolean bButton, DataRow drp, String sSystem, Int32 nRow, Double& dRowPrice, Double& dRowGST, Double& dRowTotal, Double& dRowSaving) in c:\WMS\ITERA_1_0\ik\cs\cart.cs:1710
   ASP.cart_aspx.PrintCart(Boolean bButton, Boolean bInvoice) in c:\WMS\ITERA_1_0\ik\cs\cart.cs:1571
   ASP.cart_aspx.Page_Load(Object Src, EventArgs E) in c:\WMS\ITERA_1_0\ik\cart.aspx:22
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +24
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +41
   System.Web.UI.Control.OnLoad(EventArgs e) +131
   System.Web.UI.Control.LoadRecursive() +65
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2427

Version Information: Microsoft .NET Framework Version:2.0.50727.9044; ASP.NET Version:2.0.50727.9031