Hello World VBNet - SDK sample

Hello World VBNet sample is a simple Windows console application that prints one page with the "novaPDF says Hello World from VB.Net" text to the novaPDF Printer. It demonstrates the basic use of the INovaPDFOptions interface with this type of code.

Note: To be able to use the samples you must install novaPDF SDK as samples work only with it. Download it here: nova PDF SDK.

The printing job is made using the package "System.Drawing.Printing" Basically the sample determines the active profile, makes a copy of it into a profile called "Test VBNet", sets the new profile as active, sets the subject of the generated PDF document, prints a page, and restores original printer settings. The location of the generated document depends on whatever the settings are for the current active profile.

Because of the specific exception based error handling in .NET, all calls to methods in the INovaPDFOptions interface must be nested within a try–catch block. Consider for example that we want to add a profile called "test", but the profile "test" already exists. Then the call pNova.AddProfile("test") will throw an "System.Runtime.InteropServices.COMException". with the ErrorCode property set to NV_PROFILE_EXISTS (0xD5DA0006).

Source Code

Imports System Imports System.Drawing Imports System.Drawing.Printing Imports System.Windows.Forms ' the novapiLib package must be added as a COM refference Imports novapiLib80 Module Module1 ' <summary> ' The main entry point for the application. ' </summary> Const PRINTER_NAME As String = "novaPDF SDK 8" Const PROFILE_NAME As String = "Test VBNet" Const PROFILE_IS_PUBLIC As Integer = 0 Const NOVAPDF_INFO_SUBJECT As String = "Document Subject" Const NV_PROFILE_EXISTS As Long = -707133434 Sub Main() Try ' create the NovaPdfOptions object Dim pNova As NovaPdfOptions80 pNova = New NovaPdfOptions80 ' initialize the NovaPdfOptions object ' if you have an application license for novaPDF SDK,  pNova.Initialize(PRINTER_NAME) ' mark start changing options ' get the active profile ... Dim activeProfile As String = "" Dim nActivePublic As Integer = 0 Try pNova.GetActiveProfile(activeProfile) Catch ex As System.Runtime.InteropServices.COMException ' ignore profile exists error If (NovaErrors.NV_NO_ACTIVE_PROFILE = ex.ErrorCode) Then System.Console.WriteLine("The printer does not have an active profile") Else 'more serious error, propagate it Throw ex End If End Try Dim newProfileID As String = "" Try ' and make a copy of it pNova.AddProfile(PROFILE_NAME, PROFILE_IS_PUBLIC, newProfileID) Catch e As System.Runtime.InteropServices.COMException ' ignore profile exists error If (NV_PROFILE_EXISTS = e.ErrorCode) Then System.Console.WriteLine("Profile already exists") Else ' more serious error, propagate it Throw e End If End Try 'load the new profile pNova.LoadProfile(newProfileID) 'nova.NovaTools.AddProfileOptions(pNova); ' and set some options ' uncomment the function calls for the options you wish to set ' change the options in the nova.cs unit 'nova.NovaTools.AddProfileOptions(pNova); 'nova.NovaTools.AddDocumentInformation(pNova); 'nova.NovaTools.AddViewerOptions(pNova); 'nova.NovaTools.AddLinksOptions(pNova); 'nova.NovaTools.AddAdvancedOptions(pNova); 'nova.NovaTools.AddGraphicsOptions(pNova); 'nova.NovaTools.AddSecurityOptions(pNova); 'nova.NovaTools.AddSaveOptions(pNova); 'nova.NovaTools.AddAfterSaveActions(pNova); 'nova.NovaTools.AddEmailOptions(pNova); 'nova.NovaTools.AddWatermarkImage(pNova); 'nova.NovaTools.AddWatermarkText(pNova); 'nova.NovaTools.AddPageContentOptions(pNova); 'nova.NovaTools.AddOverlayOptions(pNova); 'nova.NovaTools.AddSignatureOptions(pNova); 'nova.NovaTools.AddEmbedFontsOptions(pNova); 'nova.NovaTools.AddBookmarksDefinitions(pNova); 'save the new added profile pNova.SaveProfile() ' set the copy profile as active profile ... pNova.SetActiveProfile(newProfileID) ' print a test page, using the previously set active profile settings Dim pd As PrintDocument = New PrintDocument pd.PrinterSettings.PrinterName = PRINTER_NAME AddHandler pd.PrintPage, AddressOf PrintPageFunction pd.Print() If ((activeProfile.Length > 0) And (activeProfile.CompareTo(PROFILE_NAME) <> 0)) Then pNova.SetActiveProfile(activeProfile) pNova.DeleteProfile(newProfileID) End If Catch e As System.Runtime.InteropServices.COMException MessageBox.Show(e.Message) Catch e As Exception MessageBox.Show(e.Message) End Try End Sub ' and finally the function that actually prints the page Private Sub PrintPageFunction(ByVal sender As Object, ByVal ev As PrintPageEventArgs) Dim str As String = "novaPDF says Hello World from VB.Net" Dim font As Font = New Font("Arial", 16) Dim brush As Brush = New SolidBrush(Color.Black) ev.Graphics.DrawString(str, font, brush, 20.0!, 20.0!) ev.HasMorePages = False End Sub End Module 


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