How do i automatic load an image in my C# program with open with( from left click of the mouse).

Question

I've developed a program with windows forms that open images and show them in a image box (because i hate the image viewer from windows 10, is too slow) so i decided to start this easy project.
But after finished everything i've decided to improve my program a little.
My idea is, if i click, lets take for example, on an excel file in pc, the excel program open and automaticly load that file that i clicked on, i dont need to click in file and after this click on menu, file, load and choose a file to load.
I want to do exact the same, but with png and jpg files.
I've tried to do the same, but my program don't automatic load the image file, because i don't know how to get a path from a random jpg that i click on to open.
Somebody can help me, i'm new programming in C#.

Answer 1

You will want to change the default app association for .png and .jpg files. Here is one way to do it:
1. In Windows 10 File Explorer right-click on an image file that you want to associate with your viewer.
2. Select Open with >
3. Select Choose another app
4. Click on More apps
5. Put a check mark in the box for Always use this app to open .[xxx] files
6. Click on Look for another app on this PC
7. Navigate to your viewer, click on it and press Open. Hereafter, double-clicking on the same file type should open with your viewer program instead of Microsoft Photos.

Answer 2

I've already did this and unfortunally, this only opens my application when i click in a jpg or png file, what i'm looking for is how to open and automatic load.

If i could get the path from the last file that i clicked on from an history open file log, it will be something simple. But i really don't know where i can find this.

But thanks anyway😉

Answer 3

Windows adds the path\filename to the command line. Your program needs to read the command line arguments passed into main.

This link should give a quick start toward that end. https://www.c-sharpcorner.com/article/access-command-line-arguments-in-C-Sharp/