Visual C#.NET - Image Hotspot Annotation

C# Image Hotspot Annotation - Preparation

• Yiigo.Image for .NET Download: Download this C# imaging library SDK online and unzip the file.
• Yiigo.Image for .NET Installation: Install the Visual C# image component by running the exe file.
• Yiigo.Image for .NET Activation: Activate the purchased license by entering the serial number or requesting an evaluation license first and follow the wizard for activation.

C# Image Hotspot Annotation - Rectangle Annotation

• Minimum requirement first: you should have installed Microsoft Visual Studio 2005 or above, or Visual Studio Express.
• Start your Visual Studio and create an empty Visual C#.NET imaging project with the given template. Or you can open the C# image project you are working on.
• Now you can add the annotation library DLL to your project reference: Yiigo.Image.Annotation.dll.
• Enable the namespace Yiigo.Image.Annotate in your project.
• Copy the C# sample code below to add a rectangle hotspot annotation on your png image. Other image formats are supported including Jpeg, Gif, Tiff, etc.
• You can also adjust annotation settings, such as flipping, rotating, resizing, text editing, etc.

using System;
using System.Object;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using Yiigo.Image.Annotation;

/*Create a freehand hotspot annotation on your image.
FreehandFotspotAnnotation myAnnotation = new FreehandHotspotAnnotation();
*/

// Create a rectangle hotspot annotation on your image.
HotspotAnnotation myAnnotation = new HotspotAnnotation();

myAnnotation.AnnotationData = "Hotspot Annotation";
myAnnotation.Fill = new AnnotationBrush(Color.Blue);
myAnnotation.Shadow = new AnnotationBrush(Color.Blue);
myAnnotation.Location = new PointF(100, 100);
myAnnotation.Size = new SizeF(120, 80);
annotationController1.CurrentLayer.Items.Add(myAnnotation);

C# Image Hotspot Annotation - Freehand Hotspot Annotation

• Start your Microsoft Visual Studio and open your Visual C# image project.
• Add Yiigo.Image.Annotation.dll to your project reference.
• Copy the C# sample code below to add a freehand hotspot annotation on your png image.
• Now you need to use your mouse to draw out the shape of the freehand hotspot annotation. Then you can customize the annotation settings in Visual C# coding.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using Yiigo.Image.Annotation;

//Create a freehand hotspot annotation on your image.
FreehandFotspotAnnotation myAnnotation = new FreehandHotspotAnnotation();

C# Image Hotspot Annotation - Settings & Parameters

• Location stands for the center point of the hotspot annotation, measured by the horizontal and vertical coordinates.
• Size stands for the width and height of the freehand rectangle annotation, measured in pixel.
• Color parameter is the one for you to customize the outline color and the rectangle background color.

• C# Image Project - Callout Annotation Creation
• C# Image Project - Ellipse Annotation Creation
• C# Image Project - Freehand Annotation Creation
• C# Image Project - Polygon Annotation Creation
• C# Image Project - Rectangle Annotation Creation
• C# Image Project - Rubber Stamp Annotation Creation
• C# Image Project - Text Annotation Creation
• C# Image Project - Line Annotation Creation