Server Error in '/' Application.

Input string was not in a correct format.

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.FormatException: Input string was not in a correct format.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[FormatException: Input string was not in a correct format.]
   System.Data.Linq.SqlClient.QueryConverter.VisitInvocation(InvocationExpression invoke) +504
   System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +1467
   System.Data.Linq.SqlClient.QueryConverter.VisitExpression(Expression exp) +31
   System.Data.Linq.SqlClient.QueryConverter.VisitBinary(BinaryExpression b) +37
   System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +520
   System.Data.Linq.SqlClient.QueryConverter.VisitExpression(Expression exp) +31
   System.Data.Linq.SqlClient.QueryConverter.VisitBinary(BinaryExpression b) +23
   System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +520
   System.Data.Linq.SqlClient.QueryConverter.VisitExpression(Expression exp) +31
   System.Data.Linq.SqlClient.QueryConverter.VisitWhere(Expression sequence, LambdaExpression predicate) +134
   System.Data.Linq.SqlClient.QueryConverter.VisitSequenceOperatorCall(MethodCallExpression mc) +4785
   System.Data.Linq.SqlClient.QueryConverter.VisitMethodCall(MethodCallExpression mc) +71
   System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +1114
   System.Data.Linq.SqlClient.QueryConverter.VisitFirst(Expression sequence, LambdaExpression lambda, Boolean isFirst) +32
   System.Data.Linq.SqlClient.QueryConverter.VisitSequenceOperatorCall(MethodCallExpression mc) +582
   System.Data.Linq.SqlClient.QueryConverter.VisitMethodCall(MethodCallExpression mc) +71
   System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +1114
   System.Data.Linq.SqlClient.QueryConverter.ConvertOuter(Expression node) +105
   System.Data.Linq.SqlClient.SqlProvider.BuildQuery(Expression query, SqlNodeAnnotations annotations) +119
   System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +138
   System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute(Expression expression) +58
   System.Linq.Queryable.SingleOrDefault(IQueryable`1 source) +220
   Mesnevi.Page.Page_Load(Object sender, EventArgs e) +1671
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0