Today after installed some Windows patches to the server and reboot, one of a website does not work. It shows "Service Unavailable" when browse it. I try to restart the website but problem still exist. Finally found that the Application Pools cannot start properly because of the AD account used have changed the password.
Today I got "Cannot cast DBNull.Value to type 'System.DateTime'. Please use a nullable type." error in the C# application. After my trace, it is caused by this line: DateTime? moveOutDate = dt.Rows[0].Field ("MoveOutDate"); You should make it as: DateTime? moveOutDate = dt.Rows[0].Field ("MoveOutDate");
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