Server Error in '/' Application. Input string was not in a correct format. 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.FormatException: Input string was not in a correct format. Source Error: The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL: 1. Add a "Debug=true" directive at the top of the file that generated the error. Example: <%@ Page Language="C#" Debug="true" %> or: 2) Add the following section to the configuration file of your application: <configuration> <system.web> <compilation debug="true"/> </system.web> </configuration> Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode. Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario. Stack Trace: [FormatException: Input string was not in a correct format.] System.Number.ParseDouble(String value, NumberStyles options, NumberFormatInfo numfmt) +14671979 System.Double.Parse(String s, NumberStyles style, IFormatProvider provider) +43 Microsoft.VisualBasic.CompilerServices.Conversions.ParseDouble(String Value, NumberFormatInfo NumberFormat) +253 Microsoft.VisualBasic.CompilerServices.Conversions.ToDouble(String Value, NumberFormatInfo NumberFormat) +83 [InvalidCastException: Conversion from string "" to type 'Double' is not valid.] Microsoft.VisualBasic.Strings.FormatNumber(Object Expression, Int32 NumDigitsAfterDecimal, TriState IncludeLeadingDigit, TriState UseParensForNegativeNumbers, TriState GroupDigits) +514 ASP.pages_main_tarieven_aspx.__RenderpnlPrintInfo(HtmlTextWriter __w, Control parameterContainer) +1797 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117 System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) +15 System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +50 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79 ASP.pages_main_tarieven_aspx.__RenderC1(HtmlTextWriter __w, Control parameterContainer) +1359 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79 ASP.masterpages_main_master.__Renderbody(HtmlTextWriter __w, Control parameterContainer) +2224 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117 System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +47 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79 ASP.masterpages_main_master.__Render__control1(HtmlTextWriter __w, Control parameterContainer) +601 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +117 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +250 System.Web.UI.Page.Render(HtmlTextWriter writer) +39 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +79 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8753 Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3282.0