private void PrintReport(Notification notification, SubscriptionData data)
{
try
{
// Debug
m_sb.Append(System.DateTime.Now + Environment.NewLine);
// Make sure that the format for rendering to a printer is available
if (!CanRenderImage)
{
throw new Exception("The IMAGE rendering extension needed for printer delivery is not available.");
}
// Correctly format device info strings
string pageWidth = data.pageWidth + "in";
string pageHeight = data.pageHeight + "in";
string deviceInfo;
// Render each page in the report and store it in a
// Stream array until a blank page is rendered. This
// marks the end of the report
deviceInfo = String.Format(
System.Globalization.CultureInfo.InvariantCulture,
@"<DeviceInfo><OutputFormat>{0}</OutputFormat><PageHeight>{1}</PageHeight><PageWidth>{2}</PageWidth></DeviceInfo>",
"emf", pageHeight, pageWidth);
// Render report
m_files = notification.Report.Render("IMAGE", deviceInfo);
m_numberOfPages = m_files.Length;
// Write render information to the log entry
m_sb.Append("Number of pages: " + m_numberOfPages + Environment.NewLine);
// Configure printer settings
PrinterSettings printerSettings = new PrinterSettings();
printerSettings.PrintRange = PrintRange.SomePages;
printerSettings.FromPage = 1;
printerSettings.ToPage = m_numberOfPages;
/* The name of the printer comes from the subscription data.
* Validate the printer against known, installed printers on the server.
* This is done in the ValidateUserData method as well as now at deliver
* time to ensure that a printer has not been uninstalled since the time
* The subscription was created and the time the delivery takes place
*
* Note: In production code, you would want to make this check earlier
* because the Render operation can take significant amounts of time
* and memory. It is presented here in the sample flow for clarity.
*/
if (!IsValidPrinter(data.Printer))
throw new Exception("The printer " + data.Printer + " is not currently installed on the server.");
printerSettings.PrinterName = data.Printer;
// Create print document and set printer settings
PrintDocument pd = new PrintDocument();
m_currentPrintingPage = 1;
m_lastPrintingPage = m_numberOfPages;
pd.PrinterSettings = printerSettings;
// Print pages
pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
pd.Print();
// Set the status if the report pages were successfully sent to the printer
notification.Status = String.Format(
System.Globalization.CultureInfo.InvariantCulture,
"Report printed to {0}", data.Printer);
}
catch (Exception ex)
{
// Set the status of the notification if an error occurs
notification.Status = ex.Message;
// Write exception information to a logfile
m_sb.Append(ex.Message + ": " + ex.StackTrace + Environment.NewLine);
}
finally
{
WriteLog(m_sb);
m_sb = null;
}
}
/// <summary>
/// Delivers the report notification to a user based on the contents of the notification.
/// </summary>
/// <param name="notification">A Notification object containing information required by the
/// delivery extension to deliver a report.</param>
/// <returns>A Boolean value indicating whether or not to retry the delivery.</returns>
bool IDeliveryExtension.Deliver(Notification notification)
{
bool success = false;
// Set the status of the notification to pending
notification.Status = "Processing...";
try
{
// Build user data
Setting[] userSettings = notification.UserData;
SubscriptionData subscriptionData = new SubscriptionData();
subscriptionData.FromSettings(userSettings);
// Print the report
PrintReport(notification, subscriptionData);
// If delivery is successful return true
success = true;
}
catch (Exception ex)
{
// Set the status of the notification if an error occurs
notification.Status = "Error: " + ex.Message;
success = false;
}
finally
{
// Finally, save the notification information
notification.Save();
}
return success;
}
