Category Archives: image processing

Use the mouse wheel to scale an image in C#

Posted on August 7, 2017 by RodStephens

This example lets you use the mouse wheel to zoom in and out on an image. To use the mouse wheel, the program needs to catch the MouseWheel event. Unfortunately that event isn’t listed in the Form Designer so you … Continue reading →

Posted in events, graphics, image processing | Tagged C#, C# programming, events, example, example program, graphics, image processing, mouse wheel, scale, Windows Forms programming, zoom | Leave a comment

Save several images into Access in C#

Posted on May 12, 2017 by Rod Stephens

The example Save images in an Access database in C# includes an Access database. Unfortunately if you save several images into the database and then open the database in Access, Access removes the images. It just doesn’t seem to understand … Continue reading →

Posted in database, graphics, image processing, Office | Tagged Access, C#, C# programming, database, example, example program, graphics, image, image file, image processing, initialize list, list, ListBox, Microsoft Access, Office, picture, save images, save several images, Windows Forms programming | 1 Comment

Load images from an Access database in C#

Posted on May 10, 2017 by Rod Stephens

The post Save images in an Access database in C# explains how to save images in an Access database. This post explains how to load images from an Access display them. Like previous examples, this program uses a SQL statement … Continue reading →

Save images in an Access database in C#

Posted on May 9, 2017 by Rod Stephens

This example shows how you can save images in an Access database. The example Use filenames stored in a database to display images in C# shows how to display images by saving the image file names in a database and … Continue reading →

Use the Filter property to select image files in C#

Posted on May 8, 2017 by Rod Stephens

This example is mostly intended to make it easier to find these filters. I use them a lot and it’s a pain to have to recreate them every time I need them. When you click the Different Types button, the … Continue reading →

Posted in controls, dialogs, image processing | Tagged bmp, C#, C# programming, controls, dialogs, example, example program, filter property, image files, image processing, images, jpg, picture files, pictures, png, tif, Windows Forms programming | Leave a comment

Use filenames stored in a database to display images in C#

Posted on May 5, 2017 by Rod Stephens

The reason so many people ask how to store and retrieve images in a database is that it’s hard. You need to use a special data type such as the BLOB (Binary Large Object) or MEMO data type depending on … Continue reading →

Posted in database, graphics, image processing, user interface | Tagged C#, C# programming, database, example, example program, graphics, image, image file, image processing, initialize list, list, ListBox, picture, user interface, Windows Forms programming | 2 Comments

Make the basis for a card game in C#

Posted on March 13, 2017 by RodStephens

The goal of this example is to provide some support for building a card game. It shows how to make a class to represent cards and to to tell what card is displayed in a PictureBox. It’s actually relatively straightforward. … Continue reading →

Posted in games, graphics, image processing, puzzles | Tagged C#, C# programming, card deck, card game, cards, example, example program, games, graphics, image processing, playing cards, puzzles, Windows Forms programming | Leave a comment

Verify sizes of playing cards in C#

Posted on March 13, 2017 by RodStephens

Recently I wanted to use some playing cards in a program so I looked online for some nice images. I could have included 55 or so separate images (including jokers and backs), but I decided it would be easier to … Continue reading →

Posted in games, graphics, image processing, puzzles | Tagged C#, C# programming, card deck, cards, example, example program, games, graphics, image processing, playing cards, puzzles, Windows Forms programming | Leave a comment

Make light pixels transparent in an image in C#

Posted on February 7, 2017 by RodStephens

Recently I had an image and I wanted to make all of the light pixels transparent. Ideally I could simply make the white pixels transparent, but the image was scanned so few of the pixels were pure white. What I … Continue reading →

Posted in graphics, image processing | Tagged Bitmap, C#, C# programming, example, example program, graphics, image processing, ImageAttributes, light pixels, tansparent background, transparent, Windows Forms programming | Leave a comment

Draw a smiley face with WPF in C#

Posted on February 6, 2017 by RodStephens

Often I need to use images for demonstration purposes or for a book, and a smiley face makes a neutral, pleasant image. This example shows how to draw a smiley face with XAML and WPF, and then save an image … Continue reading →