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کد:
Server Error in '/' Application.
Login failed for user 'raf'. 
 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.Data.SqlClient.SqlException: Login failed for user 'raf'.

Source Error: 
 An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 


Stack Trace: 

[SqlException: Login failed for user 'raf'.]
   PublicSqlMethods.GetDataTable(String strCommand, String connectionString)
   PublicSqlMethods.GetDataTable(String strCommand)
   IPFilter.GetActiveFilterRules(IPFilterScope filterScope)
   IPFilter.IsBannedIP(IPFilterScope scope, String userIPAddress, Int32& matchedFilterID)
   IPFilter.CheckBannedIP(IPFilterScope scope)
   IPFilter.CheckBannedIP(IPFilterScope scope, Boolean bypassCommonPages)
   Global.Application_BeginRequest(Object sender, EventArgs e)
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication+IExecutionStep.Execute() +60
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +87
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