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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:
Line 27: ' // Đọc dử liều từ file count_visit.txt Line 28: Dim read As System.IO.StreamReader = New System.IO.StreamReader(Server.MapPath("count_visit.txt")) Line 29: count_visit = Integer.Parse(read.ReadLine()) Line 30: read.Close() Line 31: ' // Tăng biến count_visit thêm 1
Source File: C:\Inetpub\vhosts\yduoctuetinh.edu.vn\httpdocs\global.asax Line: 29 Stack Trace:
[FormatException: Input string was not in a correct format.] System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +13033687 System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +122 System.Int32.Parse(String s) +26 ASP.global_asax.Session_OnStart() in C:\Inetpub\vhosts\yduoctuetinh.edu.vn\httpdocs\global.asax:29 [TargetInvocationException: Exception has been thrown by the target of an invocation.] System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0 System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +91 System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +105 System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +21 System.Web.Util.ArglessEventHandlerProxy.Callback(Object sender, EventArgs e) +59 System.Web.SessionState.SessionStateModule.RaiseOnStart(EventArgs e) +10081464 System.Web.SessionState.SessionStateModule.CompleteAcquireState() +165 System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) +1126 System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +297 System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +50 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +163
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4676.0

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