Server Error in '/catalog20' 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 482:            <div class="row">
Line 483:                <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12 dv_user" style="">
Line 484:                    <span style=" color: #999999;font-size:12px;">Welcome <%=Session["User"].ToString()%>,</span>
Line 485:                    <a href="Login.aspx"  style=" color: #999999; font-size: 12px; letter-spacing: 1px; cursor: pointer;""><span>Logout</span></a>
Line 486:                </div>

Source File: d:\OBTWEB\WebApp\DigitalCatalog_DTXJ20\Default.aspx    Line: 484

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   ASP.default_aspx.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in d:\OBTWEB\WebApp\DigitalCatalog_DTXJ20\Default.aspx:484
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +270
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +9839490
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
   System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +55
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +67
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +101
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +43
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +129
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +14
   System.Web.UI.Page.Render(HtmlTextWriter writer) +30
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +67
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +101
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +27
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1342


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0