我正在尝试从数据库中提取一些二进制数据并将其写入pdf文件。在大多数情况下，这进展顺利，但偶尔出现的数据行似乎会引发特定错误-

超时时间已到。在操作完成之前超时或服务器没有响应。

请记住，这仅在少数几行上发生，并且绝不是随机的。相同的行始终会引发异常。我不太确定为什么会引发异常，但是我可以跳过确实引起问题的行并继续前进。但是，我的问题是，当我捕获到异常然后尝试移至下一行时，我遇到了另一个异常-

InvalidOperationException-当关闭阅读器时，尝试调用Read的无效尝试。

这是否意味着读取器在遇到异常后会自动关闭？我将如何在没有任何戏剧的情况下继续进行下一行？

        while (sdrReader.Read()) // Second exception happens here
        {
            try
            {
                byte[] byteData = new Byte[(sdrReader.GetBytes(0, 0, null, 0, int.MaxValue))]; // first exception happens here
                sdrReader.GetBytes(0, 0, byteData, 0, byteData.Length);
                string strOutputFileName = sdrReader.GetInt32(1).ToString() + ".pdf";
                msMemoryStreams = new MemoryStream();
                msMemoryStreams.Write(byteData, 0, byteData.Length);
                byte[] byteArray = msMemoryStreams.ToArray();

                msMemoryStreams.Flush();
                msMemoryStreams.Close();

                writeByteArrayToFile(byteData, txtFilesPath.Text + "\\" + strOutputFileName);
            }
            catch (Exception e)
            {
                Logger.Write("Document failed to convert: " + e.Message);
            }
        }

根据要求进行堆栈跟踪-

   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error)
   at System.Data.SqlClient.TdsParserStateObject.ReadSni(DbAsyncResult asyncResult, TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParserStateObject.ReadNetworkPacket()
   at System.Data.SqlClient.TdsParserStateObject.ReadBuffer()
   at System.Data.SqlClient.TdsParserStateObject.ReadByteArray(Byte[] buff, Int32 offset, Int32 len)
   at System.Data.SqlClient.TdsParser.ReadSqlValue(SqlBuffer value, SqlMetaDataPriv md, Int32 length, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlDataReader.ReadColumnData()
   at System.Data.SqlClient.SqlDataReader.ReadColumn(Int32 i, Boolean setTimeout)
   at System.Data.SqlClient.SqlDataReader.GetSqlBinary(Int32 i)
   at System.Data.SqlClient.SqlDataReader.GetBytesInternal(Int32 i, Int64 dataIndex, Byte[] buffer, Int32 bufferIndex, Int32 length)
   at System.Data.SqlClient.SqlDataReader.GetBytes(Int32 i, Int64 dataIndex, Byte[] buffer, Int32 bufferIndex, Int32 length)
   at Pdf2Rtf.Form1.Read() in F:\Code\Pdf2Rtf\Pdf2Rtf\Pdf2Rtf\Form1.cs:line 77
   at Pdf2Rtf.Form1.btnRead_Click(Object sender, EventArgs e) in F:\Code\Pdf2Rtf\Pdf2Rtf\Pdf2Rtf\Form1.cs:line 24
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Pdf2Rtf.Program.Main() in F:\Code\Pdf2Rtf\Pdf2Rtf\Pdf2Rtf\Program.cs:line 18
   at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()