Tutorial: how to add watermark to a picture using built-in .NET functionality

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This tutorial demonstrates how to add a red text (watermark) to a photo file using .NET built-in functionality without any 3rd party components and libraries (like our Watermarking SDK) in Visual Basic.NET

Download source code for this example: HowToAddWatermarkToImageInDotNetWithout3rdPartyTools_vb.zip (300 KB)

Input image:

sample input image

Output image:

output image

Imports System.Diagnostics
Imports System.Drawing

Module Module1

Sub Main()
Dim image As Image
Dim graphics As Graphics
Dim font As Font
Dim point As PointF

‘ Load image
image = Drawing.Image.FromFile(“my_sample_image.jpg”)
‘ Create graphics from image
graphics = Drawing.Graphics.FromImage(image)
‘ Create font
font = New Font(“Times New Roman”, 42.0F)
‘ Create text position
point = New PointF(150, 150)
‘ Draw text
Graphics.DrawString(“Watermark”, Font, Brushes.Red, Point)
‘ Save image
image.Save(“my_sample_output.jpg”)
‘ Open generated image file in default image viewer installed in Windows
Process.Start(“my_sample_output.jpg”)
End Sub

End Module

Download source code for this example: HowToAddWatermarkToImageInDotNetWithout3rdPartyTools_vb.zip (300 KB)