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PO"Invalid attempt to call Read when reader is closed" error (for lengthy operations only)
 

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  1. PO"Invalid attempt to call Read when reader is closed" error (for lengthy operations only)
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    <p>We have a operation in which more than 100.000 records are read from a csv file and inserted in a database. When I am using a file with 10 records, the operation is completed successfully in less than one minute.</p> <p>When I use 100.000 records, I am getting the following error “Invalid attempt to call Read when reader is closed.” after 10 minutes. Is there any Timeout that I can configure to avoid this error?</p> <p>Note: The CommandTimeout is already set as zero.</p> <pre><code>DbCommand cmd = db.GetStoredProcCommand("aspInsertZipCode"); cmd.CommandTimeout = 0; dataStringToProcess.Remove(dataStringToProcess.Length - 1, 1); db.AddInParameter(cmd, "@DataRows", DbType.String, dataStringToProcess.ToString()); db.AddInParameter(cmd, "currDate", DbType.DateTime, DateTime.Now); db.AddInParameter(cmd, "userID", DbType.Int32, UserID); db.AddOutParameter(cmd, "CountOfUnchangedZipCode", DbType.String, 1000); DbDataReader rdr = null; try { rdr = (DbDataReader)db.ExecuteReader(cmd); if (rdr.Read()) { if (!String.IsNullOrEmpty(Utility.GetString(rdr, "NewZipCode"))) strNewZipCode = strNewZipCode + "," + Utility.GetString(rdr, "NewZipCode"); } rdr.NextResult(); if (rdr.Read()) { strRetiredZipCode = strRetiredZipCode + "," + Utility.GetString(rdr, "RetiredZipCode"); } int TempUnchageZipCount = Convert.ToInt32(db.GetParameterValue(cmd, "CountOfUnchangedZipCode")); CountOfUnchangedZipCode = CountOfUnchangedZipCode + TempUnchageZipCount; dataStringToProcess = new StringBuilder(); cntRec = 0; } catch { if (rdr != null &amp;&amp; (!rdr.IsClosed)) rdr.Close(); throw; } finally { if (rdr != null &amp;&amp; (!rdr.IsClosed)) rdr.Close(); } cmd.Dispose(); </code></pre>
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    1. COI see you are passing the `Reader` around, is it getting closed inside them due to an swallowed exception ?
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    2. COi guess you found the solution and posted it as an answer ?
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      1. USV4Vendetta
 

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