Connection with SQL Server doesn't close/Can't Return more than 1000 results

Hi,

Recently we had some performance problems with the Reports and found that CR doesn't close the connection, creating one new connection for each report and setting them to sleep(not closing).

I've tried many different approaches found on the net, some even from the SAP Communityusing like .Close(), .Dispose() and setting ReportDocument to Null at Page_Unload.

After many trials and failures we fixed the connection issue filling a DataTable and using the ReportDocument.SetDataSource("DataTable") after cleaning all the connections in the report.

This fixed the hanging connections issue but we stuck on another problem.

I'm not sure if it's a issue with DataTable or not as the problem also happens when using crystal's connections(and creating all the connections in SQL Server) but we couldn't fill a report with more than 1000 lines(only one which had only 2 columns).

When i return 1000 lines the reports work, if i return 1001 - 1070 the report freezes in a white screen and if i return more than 1070 the report shows a "Out of Memory" exception.

We currently use VS2013 with Framework 4.0, CR 13.0.12.1494 for VS and SQL Server 2005.

All data comes from Stored Procedures.

Could anyone help me and my team with this problem ?

PS: We recently migrated from VS 2005 + Framework 3.5 + Integrated CR(reports worked properly at this point)

PS2: This is a legacy app.

PS3: The problem also happens when trying to export to pdf/xls

Here's the code

.aspx.cs page

    private ReportDocument myReportDocument;    protected void Page_Load(object sender, EventArgs e)    {        GC.Collect();        string strTipo = Request.QueryString["Tipo"];        ArrayList arrFiltros = ((ArrayList)Session["Parametros"]);        clsRelatorio objRelatorio = new clsRelatorio();        if (!string.IsNullOrEmpty(Request.QueryString["RelatorioID"]))        {            try            {                myReportDocument = objRelatorio.ObterDadosRelatorio(Convert.ToInt32(Request.QueryString["RelatorioID"]), arrFiltros, Server.MapPath("~/App_Reports/"));                if (strTipo == "Todos" || strTipo == string.Empty)                {                    CrystalReportViewer1.HasCrystalLogo = false;                    CrystalReportViewer1.EnableViewState = true;                    CrystalReportViewer1.SeparatePages = false;                    CrystalReportViewer1.HasToggleGroupTreeButton = false;                     CrystalReportViewer1.DisplayGroupTree = false;                                        CrystalReportViewer1.ReportSource = myReportDocument;                    CrystalReportViewer1.DataBind();                }                else                {                    string _Tipo = "";                    ExportFormatType _ExportFormatType;                    if (strTipo == "pdf")                    {                        _Tipo = "pdf";                        _ExportFormatType = CrystalDecisions.Shared.ExportFormatType.PortableDocFormat;                    }                    else                    {                        _Tipo = "xls";                        _ExportFormatType = CrystalDecisions.Shared.ExportFormatType.ExcelRecord;                    }                    myReportDocument.ExportToHttpResponse(_ExportFormatType, this.Response, false, "arquivo." + _Tipo);                }            }            catch (Exception ex)            {                UtilFormulario.DialogMessage(this.Page, ex.Message, "Erro", false);            }            finally            {                arrFiltros = null;                strTipo = null;            }        }    }    protected void Page_UnLoad(object sender, EventArgs e)    {        if (myReportDocument != null)        {            myReportDocument.Close();            myReportDocument.Dispose();            myReportDocument = null;            CrystalReportViewer1.Dispose();        }    }

Internal Class

internal ReportDocument ObterDadosRelatorio(int IDRelatorio, ArrayList Parametros, string MapPath)        {            clsSQLHelper objSQLHelper = new clsSQLHelper();            DataTable dt = new DataTable();            ReportDocument myReportDocument = new ReportDocument();            objSQLHelper.AdicionarParametros("RELATORIOID", IDRelatorio);            dt = objSQLHelper.CreateDataTable(Connections.DefaultConn, CommandType.StoredProcedure, "spGetReportData");            objSQLHelper.RemoverTodosParametros();            if (dt.Rows.Count > 0)            {                DataRow row = dt.Rows[0];                myReportDocument.Load(MapPath + row["Report"].ToString());                myReportDocument.DataSourceConnections.Clear();                clsUtilitarios Utils = new clsUtilitarios();                for (int i = 0; i < Parametros.Count; i++)                {                    string ParametroValor = Parametros[i].ToString();                    string strParametro = ParametroValor.Split(',')[0];                    string strValor = string.Empty;                    strValor = Utils.RetiraAcento(ParametroValor.Split(',')[1].Replace("#", ","));                    objSQLHelper.AdicionarParametros(strParametro.Replace("@", ""), String.IsNullOrEmpty(strValor) ? null : strValor);                }                SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings[row["BaseDados"].ToString()].ToString());
//WOP for finding max resuts                conn.Open();                DataTable dt2 = objSQLHelper.CreateDataTable(conn, CommandType.StoredProcedure, row["Procedure"].ToString());                conn.Close();                for (int i = 0; i < dt2.Rows.Count; i++)                {                    if (i > 1000)                        dt2.Rows.RemoveAt(i);                }                myReportDocument.SetDataSource(dt2);                myReportDocument.PrintOptions.PaperOrientation = (Convert.ToBoolean(row["Landscape"])) ? CrystalDecisions.Shared.PaperOrientation.Landscape : CrystalDecisions.Shared.PaperOrientation.Portrait;            }            return myReportDocument;        }