Server Error in '/' Application.

String reference not set to an instance of a String.
Parameter name: s

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.ArgumentNullException: String reference not set to an instance of a String.
Parameter name: s

Source Error:


Line 43:             tmpv = Request.QueryString("LD")
Line 44:             Dim provider As CultureInfo = CultureInfo.InvariantCulture
Line 45:             LD = Date.ParseExact(tmpv, "yyyyMMddHHmmss", provider)
Line 46: 
Line 47:             Dim Lang As String = ""

Source File: C:\inetpub\wwwroot\StartPage2016.aspx    Line: 45

Stack Trace:


[ArgumentNullException: String reference not set to an instance of a String.
Parameter name: s]
   System.DateTime.ParseExact(String s, String format, IFormatProvider provider) +6031711
   ASP.startpage2016_aspx.PageLoad(Object sender, EventArgs e) in C:\inetpub\wwwroot\StartPage2016.aspx:45
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   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:4.8.4700.0