[InvalidOperationException: Connection must be valid and open]
MySql.Data.MySqlClient.MySqlCommand.CheckState() +160
MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() +33
www.swp.com.DataHelper.ExecuteSQL(String sSQL) +220
www.swp.com.PaperInfo.Update_PDF_download(String sPaper_ID) +463
www.swp.com.CountdownloadPDF1.Page_Load(Object sender, EventArgs e) +349
System.Web.UI.Control.OnLoad(EventArgs e) +95
System.Web.UI.Control.LoadRecursive() +59
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678
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