Use ASP.NET to launch a report as a .pdf

Output a report at runtime that launches a new window with a .PDF version of the report.

Please let other users know how useful this tip is by rating it below. Do you have a tip or code of your own you'd like to share? Submit it here.


This tip shows how to output a report at runtime that launches a new window with a .PDF version of the report.

This example assumes you have a .NET report named ReportFile included in the ASP.NET project. Create a blank ASP.NET form and add the data objects (data adapter, connection, dataset) to match the report file. Then set the page.load event to the following:


    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As 
System.EventArgs) Handles MyBase.Load
        'Populate the data source of the report.
        Me.daDataAdapter.Fill(Me.dsDataSet1)
        Dim crReport As New ReportFile
        crReport.SetDataSource(dsDataSet1)
        'Change the output stream of the current form
        Dim strStream As New System.IO.BinaryReader(crReport.ExportToStream
(CrystalDecisions.[Shared].ExportFormatType.PortableDocFormat))

        Response.ClearContent()
        Response.ClearHeaders()
        Response.ContentType = "application/pdf"
        Response.BinaryWrite(strStream.ReadBytes(strStream.BaseStream.Length))
        Response.Flush()
        Response.Close()

    End Sub

By redirecting to this form, it will populate the dataset, load the report as a .PDF and redirect that output stream to the client.

To have it launch in its own window, open the form with JavaScript. Often, I will have a form with a repeater control to display data from a database, and at the bottom, I'll have a button to display a printable version. That button opens the report Web form in a new window:


<INPUT onclick="javascript:window.open('PrintPage.aspx')" type="button"
value="View Printable Version">

If you need to supply a parameter, open the page with a querystring and read that value in the page.load event. Use a parameter item for the DataAdapter.Fill:


<INPUT onclick="javascript:window.open('PrintPage.aspx?Param=Hello')" 
type="button" value="View Printable Version">

PrintPage.aspx page.load event:

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
        'Get parameter value from querystring
        Dim tcParam As String
        tcParam = Me.Request.QueryString.Get("Param")
        Me.daDataAdapter.SelectCommand.Parameters("@tValue").Value = tcParam
        Me.daDataAdapter.Fill(Me.dsDataSet1)
        Dim crReport As New ReportFile
        crReport.SetDataSource(dsDataSet1)
        Dim strStream As New System.IO.BinaryReader(crReport.ExportToStream
(CrystalDecisions.[Shared].ExportFormatType.PortableDocFormat)

        Response.ClearContent()
        Response.ClearHeaders()
        Response.ContentType = "application/pdf"
        Response.BinaryWrite(strStream.ReadBytes(strStream.BaseStream.Length))
        Response.Flush()
        Response.Close()
    End Sub

I hope this helps spark some new ideas for using reports in ASP.NET. Thanks!

This was last published in March 2004

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

SearchCloudComputing

SearchSoftwareQuality

SearchSOA

TheServerSide

SearchCloudApplications

Close