[InvalidCastException: Object cannot be cast from DBNull to other types.]
System.DBNull.System.IConvertible.ToInt32(IFormatProvider provider) +55
System.Convert.ToInt32(Object value, IFormatProvider provider) +33
MySql.Data.MySqlClient.Driver.LoadCharacterSets(MySqlConnection connection) +303
MySql.Data.MySqlClient.Driver.Configure(MySqlConnection connection) +167
MySql.Data.MySqlClient.MySqlConnection.Open() +712
scheda.Page_Load(Object sender, EventArgs e) +1492
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
System.Web.UI.Control.OnLoad(EventArgs e) +97
System.Web.UI.Control.LoadRecursive() +61
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693
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