As a standalone professional PDF document creation component, Spire.PDF allows developers/programmers using C#/VB.NET to setup PDF page. By using Spire.PDF, we can easily use C#/VB.NET to set PDF page background color and rotate page as we like. Now, we will introduce you how to use C#/VB.NET to set PDF page background and rotate.
Note: Please make sure Spire.PDF and Visual Studio are correctly installed on system.
Step 1 Create a Project
Create a project in Visual Studio and add Spire.PDF dll as reference.
Step 2 C#/VB.NET Setup PDF Page Background Color
First, Create a PDF Page.
Spire.PDF presents an easy way to create PDF page for developers. Following the code below:
Spire.PDF enables users to create new blank PDF document for drawing images. Use the following code to create a new PDF document and a page.
[C#]
//Create a pdf document.
PdfDocument doc = new PdfDocument();
//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;
[Visual Basic]
'Create a pdf document.
Dim doc As New PdfDocument()
'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
Second, draw/setup Page
Now, we can setup PDF page size, margin and background. Spire.PDF offers all color choices for users.
[C#]
// Create one page
PdfPageBase page = doc.Pages.Add(PdfPageSize.A4, margin);
page.BackgroundColor = Color.Chocolate;
//Draw page
DrawPage(page);
page = doc.Pages.Add(PdfPageSize.A4, margin);
page.BackgroundColor = Color.Coral;
[Visual Basic]
' Create one page
Dim page As PdfPageBase = doc.Pages.Add(PdfPageSize.A4, margin)
page.BackgroundColor = Color.Chocolate
'Draw page
DrawPage(page)
page = doc.Pages.Add(PdfPageSize.A4, margin)
page.BackgroundColor = Color.Coral
Third, Add Content in PDF Page
After we setup PDF page background color, we can use Spire.PDF to add some contents.
[C#]
private static void DrawPage(PdfPageBase page)
{
float pageWidth = page.Canvas.ClientSize.Width;
float y = 0;
//title
y = y + 5;
PdfBrush brush2 = new PdfSolidBrush(Color.Black);
PdfTrueTypeFont font2 = new PdfTrueTypeFont(new Font("Arial", 16f, FontStyle.Bold));
PdfStringFormat format2 = new PdfStringFormat(PdfTextAlignment.Center);
format2.CharacterSpacing = 1f;
String text = "Summary of Science";
page.Canvas.DrawString(text, font2, brush2, pageWidth / 2, y, format2);
SizeF size = font2.MeasureString(text, format2);
y = y + size.Height + 6;
//icon
PdfImage image = PdfImage.FromFile("Wikipedia_Science.png");
page.Canvas.DrawImage(image, new PointF(pageWidth - image.PhysicalDimension.Width, y));
float imageLeftSpace = pageWidth - image.PhysicalDimension.Width - 2;
float imageBottom = image.PhysicalDimension.Height + y;
//refenrence content
PdfTrueTypeFont font3 = new PdfTrueTypeFont(new Font("Arial", 9f));
PdfStringFormat format3 = new PdfStringFormat();
format3.ParagraphIndent = font3.Size * 2;
format3.MeasureTrailingSpaces = true;
format3.LineSpacing = font3.Size * 1.5f;
String text1 = "(All text and picture from ";
String text2 = "Wikipedia";
String text3 = ", the free encyclopedia)";
page.Canvas.DrawString(text1, font3, brush2, 0, y, format3);
size = font3.MeasureString(text1, format3);
float x1 = size.Width;
format3.ParagraphIndent = 0;
PdfTrueTypeFont font4 = new PdfTrueTypeFont(new Font("Arial", 9f, FontStyle.Underline));
PdfBrush brush3 = PdfBrushes.Blue;
page.Canvas.DrawString(text2, font4, brush3, x1, y, format3);
size = font4.MeasureString(text2, format3);
x1 = x1 + size.Width;
page.Canvas.DrawString(text3, font3, brush2, x1, y, format3);
y = y + size.Height;
//content
PdfStringFormat format4 = new PdfStringFormat();
text = System.IO.File.ReadAllText("Summary_of_Science.txt");
PdfTrueTypeFont font5 = new PdfTrueTypeFont(new Font("Arial", 10f));
format4.LineSpacing = font5.Size * 1.5f;
PdfStringLayouter textLayouter = new PdfStringLayouter();
float imageLeftBlockHeight = imageBottom - y;
PdfStringLayoutResult result
= textLayouter.Layout(text, font5, format4, new SizeF(imageLeftSpace, imageLeftBlockHeight));
if (result.ActualSize.Height < imageBottom - y)
{
imageLeftBlockHeight = imageLeftBlockHeight + result.LineHeight;
result = textLayouter.Layout(text, font5, format4, new SizeF(imageLeftSpace, imageLeftBlockHeight));
}
foreach (LineInfo line in result.Lines)
{
page.Canvas.DrawString(line.Text, font5, brush2, 0, y, format4);
y = y + result.LineHeight;
}
PdfTextWidget textWidget = new PdfTextWidget(result.Remainder, font5, brush2);
PdfTextLayout textLayout = new PdfTextLayout();
textLayout.Break = PdfLayoutBreakType.FitPage;
textLayout.Layout = PdfLayoutType.Paginate;
RectangleF bounds = new RectangleF(new PointF(0, y), page.Canvas.ClientSize);
textWidget.StringFormat = format4;
textWidget.Draw(page, bounds, textLayout);
[Visual Basic]
Private Shared Sub DrawPage(ByVal page As PdfPageBase)
Dim pageWidth As Single = page.Canvas.ClientSize.Width
Dim y As Single = 0
'title
y = y + 5
Dim brush2 As PdfBrush = New PdfSolidBrush(Color.Black)
Dim font2 As New PdfTrueTypeFont(New Font("Arial", 16.0F, FontStyle.Bold))
Dim format2 As New PdfStringFormat(PdfTextAlignment.Center)
format2.CharacterSpacing = 1.0F
Dim text As String = "Summary of Science"
page.Canvas.DrawString(text, font2, brush2, pageWidth / 2, y, format2)
Dim size As SizeF = font2.MeasureString(text, format2)
y = y + size.Height + 6
'icon
Dim image As PdfImage = PdfImage.FromFile("Wikipedia_Science.png")
page.Canvas.DrawImage(image, New PointF(pageWidth - image.PhysicalDimension.Width, y))
Dim imageLeftSpace As Single = pageWidth - image.PhysicalDimension.Width - 2
Dim imageBottom As Single = image.PhysicalDimension.Height + y
'refenrence content
Dim font3 As New PdfTrueTypeFont(New Font("Arial", 9.0F))
Dim format3 As New PdfStringFormat()
format3.ParagraphIndent = font3.Size * 2
format3.MeasureTrailingSpaces = True
format3.LineSpacing = font3.Size * 1.5F
Dim text1 As String = "(All text and picture from "
Dim text2 As String = "Wikipedia"
Dim text3 As String = ", the free encyclopedia)"
page.Canvas.DrawString(text1, font3, brush2, 0, y, format3)
size = font3.MeasureString(text1, format3)
Dim x1 As Single = size.Width
format3.ParagraphIndent = 0
Dim font4 As New PdfTrueTypeFont(New Font("Arial", 9.0F, FontStyle.Underline))
Dim brush3 As PdfBrush = PdfBrushes.Blue
page.Canvas.DrawString(text2, font4, brush3, x1, y, format3)
size = font4.MeasureString(text2, format3)
x1 = x1 + size.Width
page.Canvas.DrawString(text3, font3, brush2, x1, y, format3)
y = y + size.Height
'content
Dim format4 As New PdfStringFormat()
text = System.IO.File.ReadAllText("Summary_of_Science.txt")
Dim font5 As New PdfTrueTypeFont(New Font("Arial", 10.0F))
format4.LineSpacing = font5.Size * 1.5F
Dim textLayouter As New PdfStringLayouter()
Dim imageLeftBlockHeight As Single = imageBottom - y
Dim result As PdfStringLayoutResult _
= textLayouter.Layout(text, font5, format4, New SizeF(imageLeftSpace, imageLeftBlockHeight))
If result.ActualSize.Height < imageBottom - y Then
imageLeftBlockHeight = imageLeftBlockHeight + result.LineHeight
result = textLayouter.Layout(text, font5, format4, New SizeF(imageLeftSpace, imageLeftBlockHeight))
End If
For Each line As LineInfo In result.Lines
page.Canvas.DrawString(line.Text, font5, brush2, 0, y, format4)
y = y + result.LineHeight
Next line
Dim textWidget As New PdfTextWidget(result.Remainder, font5, brush2)
Dim textLayout As New PdfTextLayout()
textLayout.Break = PdfLayoutBreakType.FitPage
textLayout.Layout = PdfLayoutType.Paginate
Dim bounds As New RectangleF(New PointF(0, y), page.Canvas.ClientSize)
textWidget.StringFormat = format4
textWidget.Draw(page, bounds, textLayout)
Effective Screenshot:
Step 3 Rotate PDF Page
Spire.PDF can easily help developers set up PDF page rotate. The following code is showing you how to set 180 degree rotate.
[C#]
//create section
PdfSection section = doc.Sections.Add();
section.PageSettings.Size = PdfPageSize.A4;
section.PageSettings.Margins = margin;
//Rotate 180
section = doc.Sections.Add();
section.PageSettings.Size = PdfPageSize.A4;
section.PageSettings.Margins = margin;
section.PageSettings.Rotate = PdfPageRotateAngle.RotateAngle180;
page = section.Pages.Add();
DrawPage(page);
[Visual Basic]
'create section
Dim section As PdfSection = doc.Sections.Add()
section.PageSettings.Size = PdfPageSize.A4
section.PageSettings.Margins = margin
'Rotate 180
section = doc.Sections.Add()
section.PageSettings.Size = PdfPageSize.A4
section.PageSettings.Margins = margin
section.PageSettings.Rotate = PdfPageRotateAngle.RotateAngle180
page = section.Pages.Add()
DrawPage(page)
Effective Screenshot:
Step 4 Save and Preview
Once we finish all setup operations, we can use the following code to save and preview.
[C#]
//Save pdf file.
doc.SaveToFile("PageSetup.pdf");
doc.Close();
//Launching the Pdf file.
System.Diagnostics.Process.Start("PageSetup.pdf");
[Visual Basic]
'Save pdf file.
doc.SaveToFile("PageSetup.pdf")
doc.Close()
'Launching the Pdf file.
Process.Start("PageSetup.pdf")
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