How to measure a text to draw in PDF using C# and VB.NET?
Syncfusion Essential PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can measure a text to draw in PDF using C# and VB.NET.
Steps to measure a text to draw in PDF document programmatically:
- Create a new C# console application project.
- Install the Syncfusion.Pdf.WinForms NuGet package as reference to your .NET Framework application from NuGet.org.
- Include the following namespaces in the Program.cs file.
C#
using Syncfusion.Pdf; using Syncfusion.Pdf.Graphics; using System.Drawing;
VB.NET
Imports Syncfusion.Pdf Imports Syncfusion.Pdf.Graphics Imports System.Drawing
- Use the following code snippet to measure a text to draw in the PDF document.
C#
//Create the new PDF document
PdfDocument document = new PdfDocument();
//Add a page to the document
PdfPage page = document.Pages.Add();
//Create PDF graphics for the page
PdfGraphics graphics = page.Graphics;
//Create a new PDF font instance
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 12);
string text = "Hello World!";
//Measure the text
SizeF size = font.MeasureString(text);
//Draw string to the PDF page
graphics.DrawString(text, font, PdfBrushes.Black, new RectangleF(PointF.Empty, size));
//Draw rectangle
graphics.DrawRectangle(PdfPens.Red, PdfBrushes.Transparent, new RectangleF(0, 0, size.Width, size.Height));
//Save the document
document.Save("Output.pdf");
//Close the document
document.Close(true);
//This will open the PDF file so, the result will be seen in default PDF Viewer
Process.Start("Output.pdf");
VB.NET
'Create the new PDF document
Dim document As New PdfDocument()
'Add a page to the document
Dim page As PdfPage = document.Pages.Add()
'Create PDF graphics for the page
Dim graphics As PdfGraphics = page.Graphics
'Create a new PDF font instance
Dim font As PdfFont = New PdfStandardFont(PdfFontFamily.Helvetica, 12)
Dim text As String = "Hello World!"
'Measure the text
Dim size As SizeF = font.MeasureString(text)
'Draw string to the PDF page
graphics.DrawString(text, font, PdfBrushes.Black, New RectangleF(PointF.Empty, size))
'Draw rectangle
graphics.DrawRectangle(PdfPens.Red, PdfBrushes.Transparent, New RectangleF(0, 0, size.Width, size.Height))
'Save the document
document.Save("Output.pdf")
'Close the document
document.Close(True)
'This will open the PDF file so, the result will be seen in default PDF Viewer
Process.Start("Output.pdf")
A complete working sample can be downloaded from MeasureTextSample.zip.
By executing the program, you will get the PDF document as follows. 
Take a moment to peruse the documentation, where you can find other options like draw text in PDF using standard and true type fonts, display Unicode text, draw Right-To-Left text, HTML styled text, inserting rich text format content, draw complex script language text, create multicolumn PDF, ordered list and unordered list with code examples.
Refer here to explore the rich set of Syncfusion Essential PDF features.
Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.
