Server Error in '/' Application.

Public member 'ToLower' on type 'DBNull' not found.

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.MissingMemberException: Public member 'ToLower' on type 'DBNull' not found.

Source Error:


Line 21:                 Dim trl As HyperLink = CType(e.Item.FindControl("lnTopLink"), HyperLink)
Line 22:                 If (e.Item.DataItem("UseURL") = True) Then
Line 23:                     trl.NavigateUrl = e.Item.DataItem("ExURL").ToLower
Line 24:                 Else
Line 25:                     If Not rp.Count = 0 Then

Source File: E:\WEBSITE\V2WEB\ham4drad\hamdardpublicschool.in\www\siteHome.master.vb    Line: 23

Stack Trace:


[MissingMemberException: Public member 'ToLower' on type 'DBNull' not found.]
   Microsoft.VisualBasic.CompilerServices.Container.GetMembers(String& MemberName, Boolean ReportErrors) +1563868
   Microsoft.VisualBasic.CompilerServices.NewLateBinding.ObjectLateGet(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack) +134
   Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateGet(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack) +1570346
   siteHome.rptMainMenu_ItemDataBound(Object sender, RepeaterItemEventArgs e) in E:\WEBSITE\V2WEB\ham4drad\hamdardpublicschool.in\www\siteHome.master.vb:23
   System.Web.UI.WebControls.RepeaterItemEventHandler.Invoke(Object sender, RepeaterItemEventArgs e) +0
   System.Web.UI.WebControls.Repeater.OnItemDataBound(RepeaterItemEventArgs e) +134
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +191
   System.Web.UI.WebControls.Repeater.AddDataItemsIntoItemsArray(IEnumerable dataSource, Boolean useDataSource) +279
   System.Web.UI.WebControls.Repeater.PostGetDataAction(IEnumerable dataSource) +104
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +80
   System.Web.UI.WebControls.Repeater.EnsureDataBound() +67
   System.Web.UI.WebControls.Repeater.OnPreRender(EventArgs e) +20
   System.Web.UI.Control.PreRenderRecursiveInternal() +110
   System.Web.UI.Control.PreRenderRecursiveInternal() +204
   System.Web.UI.Control.PreRenderRecursiveInternal() +204
   System.Web.UI.Control.PreRenderRecursiveInternal() +204
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3624


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.2634.0