PdfDocumentSource allows you to enumerate the supported export formats for a document using the SupportedExportProviders property. The property returns a collection of ExportProvider classes that contain information about the supported formats, and can be used to create the corresponding export filter by using the NewExporter method of ExportProvider class.

Different document types support different sets of export formats, therefore enumerating and creating the export filters via SupportedExportProviders yields the correct results.

To export PDF using supported exporters

1. Drag and drop C1PdfDocumentSource, SaveFileDialog, Button, and ComboBox controls from the Toolbox on the form.
2. In the Properties window, navigate to DropDownStyle property and select DropDownList from the drop-down.
3. Switch to code view and add the following namespaces in the code view.
   • Visual Basic
   • C#

   • Visual Basic

   Imports System.IO
   Imports C1.Win.C1Document
   Imports C1.Win.C1Document.Export
   

   • C#

   using System.IO;
   using C1.Win.C1Document;
   using C1.Win.C1Document.Export;
   

4. Add a PDF file to the project. In our case, we have used PDF file named DefaultDocument.pdf from the product sample.
5. Load the PDF file into the object of C1PdfDocumentSource using the LoadFromFile method.
   • Visual Basic
   • C#

   • Visual Basic

   C1PdfDocumentSource1.LoadFromFile("..\..\DefaultDocument.pdf")
   

   • C#

   c1PdfDocumentSource1.LoadFromFile(@"..\..\DefaultDocument.pdf");
   

6. Add the following code below InitializeComponent method to get the list of supported exporters using SupportedExportProviders property.
   • Visual Basic
   • C#

   • Visual Basic

   Dim supportedProviders = C1PdfDocumentSource1.SupportedExportProviders
   For Each sep In supportedProviders
       cbExporter.Items.Add(New FileAction() With {
       .Text = String.Format("Export to {0}...", sep.FormatName),
       .ExportProvider = sep
   })
   

   • C#

   var supportedProviders = c1PdfDocumentSource1.SupportedExportProviders;
   foreach (var sep in supportedProviders)
       cbExporter.Items.Add(new FileAction()
       {
           Text = string.Format("Export to {0}...",
           sep.FormatName), ExportProvider = sep
       });
   

7. Add the following code to add a class, FileAction, containing variables.
   • Visual Basic
   • C#

   • Visual Basic

   Private Class FileAction
       Public Property Text() As String
           Get
               Return m_Text
           End Get
           Set
               m_Text = Value
           End Set
       End Property
       Private m_Text As String
       Public Property ExportProvider() As ExportProvider
           Get
               Return m_ExportProvider
           End Get
           Set
               m_ExportProvider = Value
           End Set
       End Property
       Private m_ExportProvider As ExportProvider
       Public Overrides Function ToString() As String
           Return Text
       End Function
   End Class
   

   • C#

   private class FileAction
   {
       public string Text { get; set; }
       public ExportProvider ExportProvider { get; set; }
       public override string ToString()
       {
           return Text;
       }
   }
   

8. Add the following code to create a method, DoExport, for exporting the PDF to another format using Export method.
   
   • Visual Basic
   • C#

   • Visual Basic

   Private Sub DoExport(pds As C1PdfDocumentSource, ep As ExportProvider)
       SaveFileDialog1.DefaultExt = "." + ep.DefaultExtension
       SaveFileDialog1.FileName = Path.GetFileName("Document") + "." +
                                  ep.DefaultExtension
       SaveFileDialog1.Filter = String.Format("{0} (*.{1})|*.{1}|All files (*.*)|*.*",
                                ep.FormatName, ep.DefaultExtension)
   
       If SaveFileDialog1.ShowDialog(Me) <> DialogResult.OK Then
           Return
       End If
   
       Try
           Dim exporter = ep.NewExporter()
           exporter.ShowOptions = False
           exporter.FileName = SaveFileDialog1.FileName
           If exporter.ShowOptionsDialog() Then
               pds.Export(exporter)
               MessageBox.Show(Me, "Document was successfully exported.",
                               "Information", MessageBoxButtons.OK,
                               MessageBoxIcon.Information)
           End If
       Catch ex As Exception
           MessageBox.Show(Me, ex.Message, "Error", MessageBoxButtons.OK,
                           MessageBoxIcon.[Error])
       End Try
   End Sub
   

   • C#

   private void DoExport(C1PdfDocumentSource pds, ExportProvider ep)
   {
       saveFileDialog1.DefaultExt = "." + ep.DefaultExtension;
       saveFileDialog1.FileName = Path.GetFileName("Document")+ "." + 
                                  ep.DefaultExtension;
       saveFileDialog1.Filter = string.Format("{0} (*.{1})|*.{1}|All files (*.*)|*.*",
                                ep.FormatName, ep.DefaultExtension);
   
       if (saveFileDialog1.ShowDialog(this) != DialogResult.OK)
           return;
   
       try
       {
           var exporter = ep.NewExporter();
           exporter.ShowOptions = false;
           exporter.FileName = saveFileDialog1.FileName;
           if (exporter.ShowOptionsDialog())
           {
               pds.Export(exporter);
               MessageBox.Show(this, "Document was successfully exported.",
                               "Information", MessageBoxButtons.OK,
                               MessageBoxIcon.Information);
           }
       }
       catch (Exception ex)
       {
           MessageBox.Show(this, ex.Message, "Error", MessageBoxButtons.OK,
                           MessageBoxIcon.Error);
       }
   }
   

9. Add the following code to the button's click event to call the DoExport method that accepts the object of C1PdfDocumentSource and ExportProvider as parameters.
   
   • Visual Basic
   • C#

   • Visual Basic

   DoExport(C1PdfDocumentSource1, DirectCast(cbExporter.SelectedItem,
            FileAction).ExportProvider)
   

   • C#

   DoExport(c1PdfDocumentSource1, ((FileAction)
            cbExporter.SelectedItem).ExportProvider);