[FormatException: Input string was not in a correct format.]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +12937621
System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +120
CemGida.category.getUppercatSub() in C:\Users\taygunk\Documents\Visual Studio 2017\Projects\CemGida\CemGida\category.aspx.cs:49
CemGida.category.Page_Load(Object sender, EventArgs e) in C:\Users\taygunk\Documents\Visual Studio 2017\Projects\CemGida\CemGida\category.aspx.cs:23
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.Web.UI.Control.OnLoad(EventArgs e) +95
System.Web.UI.Control.LoadRecursive() +59
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678
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