[FormatException: Input string was not in a correct format.]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +12937893
System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +120
System.Convert.ToInt32(String value) +44
up_event1.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\nludelhi.ac.in\httpdocs\up-event1.aspx.cs:20
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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