Server Error in '/' Application.

Operator '>=' is not defined for type 'DBNull' and string "7.5".

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.InvalidCastException: Operator '>=' is not defined for type 'DBNull' and string "7.5".

Source Error:


Line 13:             <div class ="div1">
Line 14:                 <div>
Line 15:                     <%Response.Write(CreateStationTable(Val(Request.QueryString("Station"))))%>
Line 16:                 </div>
Line 17:                 <br />

Source File: C:\Web\Sites\www.vk5microwave.net\AR_Weather\Station.aspx    Line: 15

Stack Trace:


[InvalidCastException: Operator '>=' is not defined for type 'DBNull' and string "7.5".]
   Microsoft.VisualBasic.CompilerServices.Operators.ConditionalCompareObjectGreaterEqual(Object Left, Object Right, Boolean TextCompare) +513043
   Common.CreateStationTable(Int32 iStation) +2203
   ASP.station_aspx.__RenderStation1(HtmlTextWriter __w, Control parameterContainer) in C:\Web\Sites\www.vk5microwave.net\AR_Weather\Station.aspx:15
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +256
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +163
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
   System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +51
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +40
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Page.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266


Version Information: Microsoft .NET Framework Version:2.0.50727.8806; ASP.NET Version:2.0.50727.8762