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PODataSet raises NoNullAllowedException even if a value is passed!
 

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  1. PODataSet raises NoNullAllowedException even if a value is passed!
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    <p>I'm writing a game server to which many players connect. I load up the DB into a DataSet(strong typed). Every time a player logs in, I add a new row to Messages table using a TableAdapter.</p> <pre><code>code var newRow = _db.Messages.NewMessagesRow(); // _db is a strong-typed-dataset { newRow.Title = title; newRow.Text = text; newRow.ReceiverUID = receiverUID; newRow.Deleted = false; } // I lock the _db.Messages, so it happens one at a time lock ( _db.Messages ) { _db.Messages.AddMessagesRow( newRow ); _adapterMessages.Connection.Open(); _adapterMessages.Update( newRow ); newRow.MessageID = (Int64)_adapterMessages.GetIdentity(); newRow.AcceptChanges(); _adapterMessages.Connection.Close(); } </code></pre> <p>NewMessagesRow() and AddMessagesRow() is auto-generated by VS. I did it by adding a DataSet item(.xsd file) and dragging all the DB tables to it.</p> <pre><code> public MessagesRow NewMessagesRow() { return ((MessagesRow)(this.NewRow())); } public void AddMessagesRow(MessagesRow row) { this.Rows.Add(row); } </code></pre> <p>_db is a DataSet(strong-typed, auto-generated by VS) _db.Messages is a DataTable.</p> <p>while in testing, I get</p> <pre><code>System.Data.NoNullAllowedException: Column 'Deleted' does not allow nulls. at System.Data.DataColumn.CheckNullable(DataRow row) at System.Data.DataTable.RaiseRowChanging(...) at System.Data.DataTable.SetNewRecordWorker(...) at System.Data.DataTable.InsertRow(...) at System.Data.DataRowCollection.Add(DataRow row) at Server.Database.MessagesDataTable.AddMessagesRow(MessagesRow row) </code></pre> <p>AddMessagesRow() gets called only in the code above, and I always set false for Deleted column, but still gets this message...</p> <p>I don't use _adapterMessages anywhere else, but there are other adapters (_adapterUsers, _adapterMatches,... etc) that could be used concurrently.</p> <p>I don't get the exception every time, but if the server runs for sometime(like > 30 min) with about 1000 concurrent players, it happens.</p> <p>Any help or advices will be greatly appreciated. Thanks :)</p>
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    1. USwooohoh
    1. USwooohoh
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    1. COPls post code for NewMessagesRow and AddMessagesRow, and definition of _db.Messages
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      1. PODataSet raises NoNullAllowedException even if a value is passed!
      1. USSteve Townsend
    2. COI posted the code for NewMessagesRow() and AddMessagesRow() :) _db.Messages is just System.Data.TypedTableBase<MessagesRow> which extends DataTable. In Short, they are all just DataTable, and DataSet ..etc genereated by VS to support the strong types.
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      1. PODataSet raises NoNullAllowedException even if a value is passed!
      1. USwooohoh
 

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