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 50:     public SiteMapNode SiteMap_SiteMapResolve(object sender, SiteMapResolveEventArgs e)
Line 51:     {
Line 52:         SiteMapNode n = SiteMap.CurrentNode.Clone(true);
Line 53: 
Line 54:         #region 課程清單頁面website處理

Source File: e:\Inetpub\DSAWEB\App_Code\BasePage.cs    Line: 52

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   BasePage.SiteMap_SiteMapResolve(Object sender, SiteMapResolveEventArgs e) in e:\Inetpub\DSAWEB\App_Code\BasePage.cs:52
   System.Web.SiteMapProvider.ResolveSiteMapNode(HttpContext context) +338
   System.Web.SiteMapProvider.get_CurrentNode() +40
   System.Web.SiteMap.get_CurrentNode() +37
   BasePage.SiteMap_SiteMapResolve(Object sender, SiteMapResolveEventArgs e) in e:\Inetpub\DSAWEB\App_Code\BasePage.cs:52
   System.Web.SiteMapProvider.ResolveSiteMapNode(HttpContext context) +338
   System.Web.SiteMapProvider.get_CurrentNode() +40
   System.Web.SiteMapProvider.GetCurrentNodeAndHintAncestorNodes(Int32 upLevel) +20
   System.Web.UI.WebControls.SiteMapPath.CreateControlHierarchy() +60
   System.Web.UI.WebControls.SiteMapPath.CreateChildControls() +35
   System.Web.UI.Control.EnsureChildControls() +102
   System.Web.UI.WebControls.CompositeControl.get_Controls() +15
   System.Web.UI.WebControls.SiteMapPath.OnDataBinding(EventArgs e) +22
   System.Web.UI.WebControls.SiteMapPath.DataBind() +31
   Master_School.Page_Load(Object sender, EventArgs e) in e:\Inetpub\DSAWEB\Master\School.master.cs:40
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1031