The sample demonstrates how to work with automatic fields in PDF document.
using System;
using System.Drawing;
using Spire.Pdf;
using Spire.Pdf.AutomaticFields;
using Spire.Pdf.Graphics;
namespace AutomaticField
{
class Program
{
static void Main(string[] args)
{
//Create a pdf document.
PdfDocument doc = new PdfDocument();
doc.DocumentInformation.Author = "Spire.Pdf";
//margin
PdfUnitConvertor unitCvtr = new PdfUnitConvertor();
PdfMargins margin = new PdfMargins();
margin.Top = unitCvtr.ConvertUnits(2.54f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
margin.Bottom = margin.Top;
margin.Left = unitCvtr.ConvertUnits(3.17f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
margin.Right = margin.Left;
for (int i = 1; i < 4; i++)
{
//create section
PdfSection section = doc.Sections.Add();
section.PageSettings.Size = PdfPageSize.A4;
section.PageSettings.Margins = margin;
for (int j = 0; j < i; j++)
{
// Create one page
PdfPageBase page = section.Pages.Add();
DrawAutomaticField(page);
}
}
//Save pdf file.
doc.SaveToFile("AutomaticField.pdf");
doc.Close();
//Launching the Pdf file.
System.Diagnostics.Process.Start("AutomaticField.pdf");
}
private static void DrawAutomaticField(PdfPageBase page)
{
float y = 0;
//title
PdfBrush brush1 = PdfBrushes.CadetBlue;
PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("Arial", 16f, FontStyle.Bold));
PdfStringFormat format1 = new PdfStringFormat(PdfTextAlignment.Center);
page.Canvas.DrawString("Automatic Field List", font1, brush1,
page.Canvas.ClientSize.Width / 2, y, format1);
y = y + font1.MeasureString("Automatic Field List", format1).Height;
y = y + 5;
String[] fieldList = new String[]
{
"DateTimeField",
"CreationDateField",
"DocumentAuthorField",
"SectionNumberField",
"SectionPageNumberField",
"SectionPageCountField",
"PageNumberField",
"PageCountField",
"DestinationPageNumberField",
"CompositeField"
};
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 9f));
PdfStringFormat fieldNameFormat = new PdfStringFormat();
fieldNameFormat.MeasureTrailingSpaces = true;
foreach (String fieldName in fieldList)
{
//draw field name
String text = String.Format("{0}: ", fieldName);
page.Canvas.DrawString(text, font, PdfBrushes.DodgerBlue, 0, y);
float x = font.MeasureString(text, fieldNameFormat).Width;
RectangleF bounds = new RectangleF(x, y, 200, font.Height);
DrawAutomaticField(fieldName, page, bounds);
y = y + font.Height + 3;
}
}
private static void DrawAutomaticField(string fieldName, PdfPageBase page, RectangleF bounds)
{
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 9f, FontStyle.Italic));
PdfBrush brush = PdfBrushes.OrangeRed;
PdfStringFormat format
= new PdfStringFormat(PdfTextAlignment.Left, PdfVerticalAlignment.Middle);
if ("DateTimeField" == fieldName)
{
PdfDateTimeField field = new PdfDateTimeField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.DateFormatString = "yyyy-MM-dd HH:mm:ss";
field.Draw(page.Canvas);
}
if ("CreationDateField" == fieldName)
{
PdfCreationDateField field = new PdfCreationDateField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.DateFormatString = "yyyy-MM-dd HH:mm:ss";
field.Draw(page.Canvas);
}
if ("DocumentAuthorField" == fieldName)
{
PdfDocumentAuthorField field = new PdfDocumentAuthorField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Draw(page.Canvas);
}
if ("SectionNumberField" == fieldName)
{
PdfSectionNumberField field = new PdfSectionNumberField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Draw(page.Canvas);
}
if ("SectionPageNumberField" == fieldName)
{
PdfSectionPageNumberField field = new PdfSectionPageNumberField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Draw(page.Canvas);
}
if ("SectionPageCountField" == fieldName)
{
PdfSectionPageCountField field = new PdfSectionPageCountField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Draw(page.Canvas);
}
if ("PageNumberField" == fieldName)
{
PdfPageNumberField field = new PdfPageNumberField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Draw(page.Canvas);
}
if ("PageCountField" == fieldName)
{
PdfPageCountField field = new PdfPageCountField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Draw(page.Canvas);
}
if ("DestinationPageNumberField" == fieldName)
{
PdfDestinationPageNumberField field = new PdfDestinationPageNumberField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Page = page as PdfNewPage;
field.Draw(page.Canvas);
}
if ("CompositeField" == fieldName)
{
PdfSectionPageNumberField field1 = new PdfSectionPageNumberField();
field1.NumberStyle = PdfNumberStyle.LowerRoman;
PdfSectionPageCountField field2 = new PdfSectionPageCountField();
PdfCompositeField fields = new PdfCompositeField();
fields.Font = font;
fields.Brush = brush;
fields.StringFormat = format;
fields.Bounds = bounds;
fields.AutomaticFields = new PdfAutomaticField[] { field1, field2 };
fields.Text = "section page {0} of {1}";
fields.Draw(page.Canvas);
}
}
}
}
Imports System.Drawing
Imports Spire.Pdf
Imports Spire.Pdf.AutomaticFields
Imports Spire.Pdf.Graphics
Namespace AutomaticField
Friend Class Program
Shared Sub Main(ByVal args() As String)
'Create a pdf document.
Dim doc As New PdfDocument()
doc.DocumentInformation.Author = "Spire.Pdf"
'margin
Dim unitCvtr As New PdfUnitConvertor()
Dim margin As New PdfMargins()
margin.Top = unitCvtr.ConvertUnits(2.54F, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point)
margin.Bottom = margin.Top
margin.Left = unitCvtr.ConvertUnits(3.17F, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point)
margin.Right = margin.Left
For i As Integer = 1 To 3
'create section
Dim section As PdfSection = doc.Sections.Add()
section.PageSettings.Size = PdfPageSize.A4
section.PageSettings.Margins = margin
For j As Integer = 0 To i - 1
' Create one page
Dim page As PdfPageBase = section.Pages.Add()
DrawAutomaticField(page)
Next j
Next i
'Save pdf file.
doc.SaveToFile("AutomaticField.pdf")
doc.Close()
'Launching the Pdf file.
Process.Start("AutomaticField.pdf")
End Sub
Private Shared Sub DrawAutomaticField(ByVal page As PdfPageBase)
Dim y As Single = 0
'title
Dim brush1 As PdfBrush = PdfBrushes.CadetBlue
Dim font1 As New PdfTrueTypeFont(New Font("Arial", 16.0F, FontStyle.Bold))
Dim format1 As New PdfStringFormat(PdfTextAlignment.Center)
page.Canvas.DrawString("Automatic Field List", font1, brush1, _
page.Canvas.ClientSize.Width \ 2, y, format1)
y = y + font1.MeasureString("Automatic Field List", format1).Height
y = y + 5
Dim fieldList() As String _
= {"DateTimeField", "CreationDateField", "DocumentAuthorField", _
"SectionNumberField", "SectionPageNumberField", "SectionPageCountField", _
"PageNumberField", "PageCountField", "DestinationPageNumberField", "CompositeField"}
Dim font As New PdfTrueTypeFont(New Font("Arial", 9.0F))
Dim fieldNameFormat As New PdfStringFormat()
fieldNameFormat.MeasureTrailingSpaces = True
For Each fieldName As String In fieldList
'draw field name
Dim text As String = String.Format("{0}: ", fieldName)
page.Canvas.DrawString(text, font, PdfBrushes.DodgerBlue, 0, y)
Dim x As Single = font.MeasureString(text, fieldNameFormat).Width
Dim bounds As New RectangleF(x, y, 200, font.Height)
DrawAutomaticField(fieldName, page, bounds)
y = y + font.Height + 3
Next fieldName
End Sub
Private Shared Sub DrawAutomaticField(ByVal fieldName As String, ByVal page As PdfPageBase, _
ByVal bounds As RectangleF)
Dim font As New PdfTrueTypeFont(New Font("Arial", 9.0F, FontStyle.Italic))
Dim brush As PdfBrush = PdfBrushes.OrangeRed
Dim format As New PdfStringFormat(PdfTextAlignment.Left, PdfVerticalAlignment.Middle)
If "DateTimeField" = fieldName Then
Dim field As New PdfDateTimeField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.DateFormatString = "yyyy-MM-dd HH:mm:ss"
field.Draw(page.Canvas)
End If
If "CreationDateField" = fieldName Then
Dim field As New PdfCreationDateField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.DateFormatString = "yyyy-MM-dd HH:mm:ss"
field.Draw(page.Canvas)
End If
If "DocumentAuthorField" = fieldName Then
Dim field As New PdfDocumentAuthorField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.Draw(page.Canvas)
End If
If "SectionNumberField" = fieldName Then
Dim field As New PdfSectionNumberField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.Draw(page.Canvas)
End If
If "SectionPageNumberField" = fieldName Then
Dim field As New PdfSectionPageNumberField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.Draw(page.Canvas)
End If
If "SectionPageCountField" = fieldName Then
Dim field As New PdfSectionPageCountField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.Draw(page.Canvas)
End If
If "PageNumberField" = fieldName Then
Dim field As New PdfPageNumberField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.Draw(page.Canvas)
End If
If "PageCountField" = fieldName Then
Dim field As New PdfPageCountField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.Draw(page.Canvas)
End If
If "DestinationPageNumberField" = fieldName Then
Dim field As New PdfDestinationPageNumberField()
field.Font = font
field.Brush = brush
field.StringFormat = format
field.Bounds = bounds
field.Page = TryCast(page, PdfNewPage)
field.Draw(page.Canvas)
End If
If "CompositeField" = fieldName Then
Dim field1 As New PdfSectionPageNumberField()
field1.NumberStyle = PdfNumberStyle.LowerRoman
Dim field2 As New PdfSectionPageCountField()
Dim fields As New PdfCompositeField()
fields.Font = font
fields.Brush = brush
fields.StringFormat = format
fields.Bounds = bounds
fields.AutomaticFields = New PdfAutomaticField() {field1, field2}
fields.Text = "section page {0} of {1}"
fields.Draw(page.Canvas)
End If
End Sub
End Class
End Namespace
