Knowledgebase (2344)
Children categories
Convert PDF to SVG with Custom Width and Height in C#, VB.NET
2017-10-24 07:04:26 Written by AdministratorWe've have demonstrated how to convert PDF page to SVG file format in the previous post. This guidance shows you how we can specify the width and height of output file using the latest version of Spire.PDF with C# and VB.NET.
Step 1: Load a sample PDF document to PdfDocument instance.
PdfDocument document = new PdfDocument();
document.LoadFromFile("pdf-sample.pdf");
Step 2: Specify the output file size through ConvertOptions.SetPdfToSvgOptions() method.
PdfToSvgConverter converter = new PdfToSvgConverter(inputFile);
converter.SvgOptions.ScaleX = (float)0.5;
converter.SvgOptions.ScaleY = (float)0.5;
converter.Convert(outputFile);
Step 3: Save PDF to SVG file format.
document.SaveToFile("result.svg", FileFormat.SVG);
Output:
Full Code:
using Spire.Pdf;
using Spire.Pdf.Conversion;
namespace ConvertPDFtoSVG
{
class Program
{
static void Main(string[] args)
{
PdfDocument document = new PdfDocument();
PdfToSvgConverter converter = new PdfToSvgConverter(inputFile);
converter.SvgOptions.ScaleX = (float)0.5;
converter.SvgOptions.ScaleY = (float)0.5;
converter.Convert(outputFile);
}
}
}
Imports Spire.Pdf
Imports Spire.Pdf.Conversion
Namespace ConvertPDFtoSVG
Class Program
Private Shared Sub Main(args As String())
Dim document As New PdfDocument()
document.LoadFromFile("pdf-sample.pdf")
' Specify the width And height of output SVG file
Dim Converter As New PdfToSvgConverter(inputFile)
Converter.SvgOptions.ScaleX = CSng(0.5)
Converter.SvgOptions.ScaleY = CSng(0.5)
Converter.Convert(outputFile)
document.SaveToFile("result.svg", FileFormat.SVG)
End Sub
End Class
End Namespace
Nested group is a group that contains multiple inner, nested groups. This article demonstrates how to create groups and how to outline the outer and inner groups using Spire.XLS with C# and VB.NET.
Step 1: Create a Workbook instance and get the first worksheet.
Workbook workbook = new Workbook(); Worksheet sheet = workbook.Worksheets[0];
Step 2: Insert sample data to cells.
sheet.Range["A1"].Value = "Project plan for project X"; sheet.Range["A3"].Value = "Set up"; sheet.Range["A4"].Value = "Task 1"; sheet.Range["A5"].Value = "Task 2"; sheet.Range["A7"].Value = "Launch"; sheet.Range["A8"].Value = "Task 1"; sheet.Range["A9"].Value = "Task 2";
Step 3: Set the IsSummaryRowBelow property as false, which indicates the summary rows appear above detail rows.
sheet.PageSetup.IsSummaryRowBelow = false;
Step 4: Group the rows that you want to group.
sheet.GroupByRows(2, 9, false); sheet.GroupByRows(4, 5, false); sheet.GroupByRows(8, 9, false);
Step 5: Save the file.
workbook.SaveToFile("output.xlsx", ExcelVersion.Version2013);
Output:
Full Code:
using Spire.Xls;
using System.Drawing;
namespace CreateNestedGroup
{
class Program
{
static void Main(string[] args)
{
Workbook workbook = new Workbook();
Worksheet sheet = workbook.Worksheets[0];
CellStyle style = workbook.Styles.Add("style");
style.Font.Color = Color.CadetBlue;
style.Font.IsBold = true;
sheet.PageSetup.IsSummaryRowBelow = false;
sheet.Range["A1"].Value = "Project plan for project X";
sheet.Range["A1"].CellStyleName = style.Name;
sheet.Range["A3"].Value = "Set up";
sheet.Range["A3"].CellStyleName = style.Name;
sheet.Range["A4"].Value = "Task 1";
sheet.Range["A5"].Value = "Task 2";
sheet.Range["A4:A5"].BorderAround(LineStyleType.Thin);
sheet.Range["A4:A5"].BorderInside(LineStyleType.Thin);
sheet.Range["A7"].Value = "Launch";
sheet.Range["A7"].CellStyleName = style.Name;
sheet.Range["A8"].Value = "Task 1";
sheet.Range["A9"].Value = "Task 2";
sheet.Range["A8:A9"].BorderAround(LineStyleType.Thin);
sheet.Range["A8:A9"].BorderInside(LineStyleType.Thin);
sheet.GroupByRows(2, 9, false);
sheet.GroupByRows(4, 5, false);
sheet.GroupByRows(8, 9, false);
workbook.SaveToFile("output.xlsx", ExcelVersion.Version2013);
}
}
}
Imports Spire.Xls
Imports System.Drawing
Namespace CreateNestedGroup
Class Program
Private Shared Sub Main(args As String())
Dim workbook As New Workbook()
Dim sheet As Worksheet = workbook.Worksheets(0)
Dim style As CellStyle = workbook.Styles.Add("style")
style.Font.Color = Color.CadetBlue
style.Font.IsBold = True
sheet.PageSetup.IsSummaryRowBelow = False
sheet.Range("A1").Value = "Project plan for project X"
sheet.Range("A1").CellStyleName = style.Name
sheet.Range("A3").Value = "Set up"
sheet.Range("A3").CellStyleName = style.Name
sheet.Range("A4").Value = "Task 1"
sheet.Range("A5").Value = "Task 2"
sheet.Range("A4:A5").BorderAround(LineStyleType.Thin)
sheet.Range("A4:A5").BorderInside(LineStyleType.Thin)
sheet.Range("A7").Value = "Launch"
sheet.Range("A7").CellStyleName = style.Name
sheet.Range("A8").Value = "Task 1"
sheet.Range("A9").Value = "Task 2"
sheet.Range("A8:A9").BorderAround(LineStyleType.Thin)
sheet.Range("A8:A9").BorderInside(LineStyleType.Thin)
sheet.GroupByRows(2, 9, False)
sheet.GroupByRows(4, 5, False)
sheet.GroupByRows(8, 9, False)
workbook.SaveToFile("output.xlsx", ExcelVersion.Version2013)
End Sub
End Class
End Namespace
PDF layer is a feature that arranges the content of a PDF file in layers, which allows users to selectively set some content to be visible and others to be invisible in the same PDF file. PDF layers are a common element used in layered artwork, maps and CAD drawings. This article will demonstrate how to programmatically add, hide or delete layers in a PDF file using Spire.PDF for .NET.
- Add Layers to a PDF Document in C# and VB.NET
- Set Visibility of Layers in a PDF Document in C# and VB.NET
- Delete Layers in a PDF Document in C# and VB.NET
Install Spire.PDF for .NET
To begin with, you need to add the DLL files included in the Spire.PDF for.NET package as references in your .NET project. The DLLs files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.PDF
Add Layers to a PDF Document in C# and VB.NET
Spire.PDF for .NET provides PdfDocument.Layers.AddLayer() method to add a layer in a PDF document, and you can then draw text, lines, images or shapes on the PDF layer. The detailed steps are as follows.
- Create a PdfDocument instance.
- Load a sample PDF file using PdfDocument.LoadFromFile() method.
- Add a layer with specified name in the PDF using PdfDocument.Layers.AddLayer(String) method. Or you can also set the visibility of the layer while adding it using PdfDocument.Layers.AddLayer(String, PdfVisibility) method.
- Create a canvas for the layer using PdfLayer.CreateGraphics() method.
- Draw text, image or other elements on the canvas.
- Save the result document using PdfDocument.SaveToFile() method.
- C#
- VB.NET
using Spire.Pdf;
using Spire.Pdf.Graphics;
using Spire.Pdf.Graphics.Layer;
using System.Drawing;
namespace AddLayersToPdf
{
class Program
{
static void Main(string[] args)
{
//Create a PdfDocument instance and load a sample PDF file
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile(@"C:\Users\Administrator\Desktop\Sample.pdf");
//Invoke AddLayerWatermark method to add a watermark layer
AddLayerWatermark(pdf);
//Invoke AddLayerHeader method to add a header layer
AddLayerHeader(pdf);
//Save to file
pdf.SaveToFile("AddLayers.pdf");
pdf.Close();
}
private static void AddLayerWatermark(PdfDocument doc)
{
//Create a layer named "Watermark"
PdfLayer layer = doc.Layers.AddLayer("Watermark");
//Create a font
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 48), true);
//Specify the watermark text
string watermarkText = "CONFIDENTIAL";
//Get text size
SizeF fontSize = font.MeasureString(watermarkText);
//Calculate two offsets
float offset1 = (float)(fontSize.Width * System.Math.Sqrt(2) / 4);
float offset2 = (float)(fontSize.Height * System.Math.Sqrt(2) / 4);
//Get page count
int pageCount = doc.Pages.Count;
//Declare two variables
PdfPageBase page;
PdfCanvas canvas;
//Loop through the pages
for (int i = 0; (i < pageCount); i++)
{
page = doc.Pages[i];
//Create a canvas from layer
canvas = layer.CreateGraphics(page.Canvas);
canvas.TranslateTransform(page.Canvas.Size.Width / 2 - offset1 - offset2, page.Canvas.Size.Height / 2 + offset1 - offset2);
canvas.SetTransparency(0.4f);
canvas.RotateTransform(-45);
//Draw sting on the canvas of layer
canvas.DrawString(watermarkText, font, PdfBrushes.DarkBlue, 0, 0);
}
}
private static void AddLayerHeader(PdfDocument doc)
{
// Create a layer named "Header"
PdfLayer layer = doc.Layers.AddLayer("Header");
//Get page size
SizeF size = doc.Pages[0].Size;
//Specify the initial values of X and y
float x = 90;
float y = 40;
//Get page count
int pageCount = doc.Pages.Count;
//Declare two variables
PdfPageBase page;
PdfCanvas canvas;
//Loop through the pages
for (int i = 0; (i < pageCount); i++)
{
//Draw an image on the layer
PdfImage pdfImage = PdfImage.FromFile(@"C:\Users\Administrator\Desktop\img.jpg");
float width = pdfImage.Width;
float height = pdfImage.Height;
page = doc.Pages[i];
canvas = layer.CreateGraphics(page.Canvas);
canvas.DrawImage(pdfImage, x, y, width, height);
//Draw a line on the layer
PdfPen pen = new PdfPen(PdfBrushes.DarkGray, 2);
canvas.DrawLine(pen, x, (y + (height + 5)), (size.Width - x), (y + (height + 2)));
}
}
}
}
Set Visibility of Layers in a PDF Document in C# and VB.NET
To set the visibility of an existing layer, you'll need to get a specified layer by its index or name using PdfDocument.Layers property, and then show or hide the layer using PdfLayer.Visibility property. The detailed steps are as follows.
- Create a PdfDocument instance.
- Load a sample PDF document using PdfDocument.LoadFromFile() method.
- Set the visibility of a specified layer using PdfDocument.Layers.Visibility property.
- Save the result document using PdfDocument.SaveToFile() method.
- C#
- VB.NET
using Spire.Pdf;
using Spire.Pdf.Graphics.Layer;
namespace HideLayer
{
class Program
{
static void Main(string[] args)
{
//Create a PdfDocument instance
PdfDocument pdf = new PdfDocument();
//Load a sample PDF document
pdf.LoadFromFile("AddLayers.pdf");
//Hide a specified layer by index
pdf.Layers[0].Visibility = PdfVisibility.Off;
//Hide a specified layer by name
//pdf.Layers["Watermark"].Visibility = PdfVisibility.Off;
//Save the result document
pdf.SaveToFile("HideLayer.pdf");
}
}
}
Delete Layers in a PDF Document in C# and VB.NET
Spire.PDF for .NET also allows you to remove an existing layer by its name using PdfDocument.Layers.RemoveLayer(String) method. But kindly note that the names of PDF layers may not be unique and this method will remove all PDF layers with the same name. The detailed steps are as follows.
- Create a PdfDocument instance.
- Load a sample PDF document using PdfDocument.LoadFromFile() method.
- Delete a specified layer by its name using PdfDocument.Layers.RemoveLayer(String) method.
- Save the result document using PdfDocument.SaveToFile() method.
- C#
- VB.NET
using Spire.Pdf;
namespace DeleteLayer
{
class Program
{
static void Main(string[] args)
{
//Create a PdfDocument instance
PdfDocument pdf = new PdfDocument();
//Load a sample PDF document
pdf.LoadFromFile("AddLayers.pdf");
//Remove a layer by name
pdf.Layers.RemoveLayer(("Watermark"));
//Save the result document
pdf.SaveToFile("DeleteLayer.pdf", FileFormat.PDF);
}
}
}
Apply for a Temporary License
If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.
