PdfDocumentProcessor.CreateEmptyDocument(String) Method

Creates an empty PDF document with no pages using the file path.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Docs.v23.2.dll

NuGet Package: DevExpress.Document.Processor

Declaration

C#

public void CreateEmptyDocument(
    string path
)

VB.NET

Public Sub CreateEmptyDocument(
    path As String
)

Parameters

Name	Type	Description
path	String	A string that is the full path to the PDF document file.

Remarks

Use this method to create an empty document. Then, you can continue to generate the document layout (e.g., append pages with graphics to the PDF document, generate bookmarks, and attach files) using the PDF document creation API. For more information, see the Additional Content topic.

This method allows you to decrease memory consumption when merging is performed especially for large documents. This is achieved by saving merge result directly on a local disk. So, the whole document content is not kept in memory during the merging process.

Note

When all operations with a document created using the overloaded CreateEmptyDocument method are completed, you need to close the document either by calling the PdfDocumentProcessor.CloseDocument method or disposing of the PdfDocumentProcessor instance.

The PDF specification does not describe empty documents. For this reason, most third-party PDF viewers cannot open such files. This does not apply to the DevExpress WinForms PDF Viewer and WPF PDF Viewer, which are less demanding concerning the validity of opened documents, and are capable of opening documents containing no pages.

Example

This example shows how to use PDF Graphics API to create a document with graphics content.

View Example

Program.cs

using DevExpress.Pdf;
using System;
using System.Drawing;
//...

using (PdfDocumentProcessor processor = new PdfDocumentProcessor()) {

    // Create an empty document.
    processor.CreateEmptyDocument("..\\..\\Result.pdf");

    // Create and draw PDF graphics.
    using (PdfGraphics graph = processor.CreateGraphics())
    {
        DrawGraphics(graph);

        // Render a page with graphics.
        processor.RenderNewPage(PdfPaperSize.Letter, graph);
    }
}


static void DrawGraphics(PdfGraphics graph) {
    // Draw text lines on the page.
    SolidBrush black = (SolidBrush)Brushes.Black;

    DXFont font1 = new DXFont("Times New Roman", 32, DXFontStyle.Bold);
    graph.DrawString("PDF Document Processor", font1, black, 180, 150);

    DXFont font2 = new DXFont("Arial", 20);
    graph.DrawString("Display, Print and Export PDF Documents", font2, black, 168, 230);

    DXFont font3 = new DXFont("Arial", 10);
    graph.DrawString("The PDF Document Processor is a non-visual component " +
                        "that provides the application programming interface of the PDF Viewer.", font3, black, 16, 300);

}

Program.vb

Imports DevExpress.Pdf
Imports System
Imports System.Drawing
'...

Using processor As New PdfDocumentProcessor()

    ' Create an empty document.
    processor.CreateEmptyDocument("..\..\Result.pdf")

    ' Create and draw PDF graphics.
    Using graph As PdfGraphics = processor.CreateGraphics()
        DrawGraphics(graph)

        ' Render a page with graphics.
        processor.RenderNewPage(PdfPaperSize.Letter, graph)
    End Using
End Using

Shared Sub DrawGraphics(ByVal graph As PdfGraphics)
    ' Draw text lines on the page.
    Dim black As SolidBrush = CType(Brushes.Black, SolidBrush)

    Dim font1 As New DXFont("Times New Roman", 32, DXFontStyle.Bold)
    graph.DrawString("PDF Document Processor", font1, black, 180, 150)

    Dim font2 As New DXFont("Arial", 20)
    graph.DrawString("Display, Print and Export PDF Documents", font2, black, 168, 230)

    Dim font3 As New DXFont("Arial", 10)
    graph.DrawString("The PDF Document Processor is a non-visual component " & "that provides the application programming interface of the PDF Viewer.", font3, black, 16, 300)
End Sub

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the CreateEmptyDocument(String) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

pdf-document-api-extract-pages-from-document/CS/ExtractFirstPage/Program.cs#L10

using (PdfDocumentProcessor target = new PdfDocumentProcessor()) {
    target.CreateEmptyDocument("..\\..\\ExtractedFirstPage.pdf");
    target.Document.Pages.Add(source.Document.Pages[0]);

pdf-document-api-create-combo-box-field/CS/AddComboBoxField/Program.cs#L11

// Create an empty document.
processor.CreateEmptyDocument("..\\..\\Result.pdf");

pdf-document-api-create-check-box-field/CS/AddCheckBoxField/Program.cs#L10

// Create an empty document.
processor.CreateEmptyDocument("..\\..\\Result.pdf");

pdf-document-api-add-link-to-uri/CS/AddLinkToUri/Program.cs#L12

// Create an empty document.
processor.CreateEmptyDocument("..\\..\\Result.pdf");

pdf-document-api-create-list-box-field/CS/AddListBoxField/Program.cs#L10

// Create an empty document.
processor.CreateEmptyDocument("..\\..\\Result.pdf");

VB.NET

pdf-document-api-extract-pages-from-document/VB/ExtractFirstPage/Program.vb#L11

Using target As PdfDocumentProcessor = New PdfDocumentProcessor()
    target.CreateEmptyDocument("..\..\ExtractedFirstPage.pdf")
    target.Document.Pages.Add(source.Document.Pages(0))

pdf-document-api-create-combo-box-field/VB/AddComboBoxField/Program.vb#L11

' Create an empty document.
processor.CreateEmptyDocument("..\..\Result.pdf")
' Create graphics and draw a combo box field.

pdf-document-api-create-check-box-field/VB/AddCheckBoxField/Program.vb#L11

' Create an empty document.
processor.CreateEmptyDocument("..\..\Result.pdf")
' Create graphics and draw a check box field.

pdf-document-api-add-link-to-uri/VB/AddLinkToUri/Program.vb#L12

' Create an empty document.
processor.CreateEmptyDocument("..\..\Result.pdf")
' Create and draw graphics.

pdf-document-api-create-list-box-field/VB/AddListBoxField/Program.vb#L11

' Create an empty document.
processor.CreateEmptyDocument("..\..\Result.pdf")
' Create graphics and draw a list box field.