Solved

Running & Exporting Same Crystal Report

Posted on 2009-06-29
3
552 Views
Last Modified: 2013-11-15
Hi there,
I have a report which takes a parameter ScriptRef and return the result. I am using the code below to export that report as an HTML to a web page. Code works fine for running this report once. But I'd like to run the same report more than once (in a loop) and export the content to a stream and finally flush that combined stream in a Response.End function.
When I run the web application in a debug mode I found out that it would just run the report once and then give an error when it iterates through the loop the second time.

'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.'

The reason I want to run multiple reports in one final stream is so that user can do a batch print.

Any help will be highly appreciated.

Regards,
Fawad.

protected override void OnPreRender(EventArgs e)
    {
        string Script_Reference = "241-002-002";
        string userName = ConfigurationManager.AppSettings["UserID"];
        string password = ConfigurationManager.AppSettings["Password"];
        string serverName = ConfigurationManager.AppSettings["ServerName"];
        string databaseName = ConfigurationManager.AppSettings["DatabaseName"];
        string reportName1 = "";
        // using System.IO
        MemoryStream oStream2 = new MemoryStream(); 
 
        Response.Clear();
        Response.Buffer = true;
        //Response.ContentType = "application/pdf";
        for (int i = 0; i < 2; i++)
        {
            Label1.Text += ": Hi ";
            if (Script_Reference != null)
            {
                //try
                //{
                    lblScriptRef.Text = Script_Reference;
                    Label1.Text = "";// "Script_Reference";
                    reportName1 = AccessScript.GetScriptType(Script_Reference).Trim() + ".rpt";
                    report.Load("Path\\" + reportName1);
                    report.FileName = "Path\\" + reportName1;
                    report.SetParameterValue("Script_Reference", Script_Reference.Trim());
                    report.SetDatabaseLogon(userName, password, serverName, databaseName);
                    //CrystalReportViewer1.ReportSource = report;
                    MemoryStream oStream ;
                    oStream = (MemoryStream)
        report.ExportToStream(
        CrystalDecisions.Shared.ExportFormatType.HTML40);
                    oStream.WriteTo(oStream2);
                    oStream.Close();
                    oStream.Dispose();
                    oStream = null;
                    Script_Reference = "241-002-003";
                    report.Close();
 
                //}
                //catch (Exception ex)
                //{
                //    Label1.Text = "Please select Script from the prescription screen. " + ex.Message + " Report Name: " + reportName1;
                //}
                //CrystalReportViewer1.ReportSource = report;
            }
        }
        Response.BinaryWrite(oStream.ToArray()); 
        Response.End();
    }

Open in new window

0
Comment
Question by:OrionPMS
3 Comments
 
LVL 8

Accepted Solution

by:
Bob Hoffman earned 500 total points
ID: 24740185
crystal creates temp .rpt files that are alive on your web servers hard drive until you dispose of the report file. Try disposing of the report file after you close it. Then recreate it at the top of your loop.
0
 

Author Comment

by:OrionPMS
ID: 24743469
Thank you for your reply.

I used the report.Dispose() method and now I am not getting the error!

But now I've got another problem the final stream (ostream2) displays both report on top of each other. Is there any way I could add a page break at the end of the loop so that the next report is displayed after the first one.


Regards,
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I recently went through setting up a JasperReports Server using the AWS EC2 instance, and this article will cover some basic administration tasks I had to perform.
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

713 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question