Server Error in '/' Application.

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

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.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Source Error:


Line 71: 
Line 72:         s += "<div class='courseImage'  >";
Line 73:         s += "<img  class='BookImage' itemprop='thumbnailUrl' src='/uploads/videoimage/" + GetJalaseFileName( jalaseList[0].DlLink)+".jpg' alt=' ویدئو آموزشی  " + Rec.CourseTitle+"'/>";
Line 74:         s += "</div>";
Line 75:         s += "<meta itemprop='uploadDate' content='2015 - 05 - 05T08: 00:00 + 08:00'/>";

Source File: c:\1site\20file\v1\control\MaktabItem.ascx.cs    Line: 73

Stack Trace:


[ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index]
   System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) +77
   System.Collections.Generic.List`1.get_Item(Int32 index) +14369976
   control_MaktabItem.GetcourseData() in c:\1site\20file\v1\control\MaktabItem.ascx.cs:73
   control_MaktabItem.loadCourseData(Int32 maktabCourseId) in c:\1site\20file\v1\control\MaktabItem.ascx.cs:60
   def_BaseCat.Page_Load(Object sender, EventArgs e) in c:\1site\20file\v1\def\BaseCat.aspx.cs:61
   System.Web.UI.Control.OnLoad(EventArgs e) +108
   System.Web.UI.Control.LoadRecursive() +90
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1533


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4494.0