Highlighting an area on an image in C#?

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I would like to write a program where I have an image with locations marked and a search field next to it. When an item is searched I want it to indicate on the image somehow.

I'm thinking a box or highlight or arrow image that is activated over the standard image? Would this need to be transparent then? What would be the nicest way to indicate this, using winforms or otherwise for windows 10.

Thanks.

Edit: In Summary, A CAD drawing will be made and a list of places will correspond to the map. When a user selects from the list, I would like the map to highlight for that room.

What I have tried:

Nothing yet, not sure how this would be possible.

Posted 8-Aug-21 23:26pm

Paul Carson 2021

Updated 9-Aug-21 1:13am

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Richard MacCutchan 9-Aug-21 5:35am

What do you mean by "items": people, places, businesses ... ?

Paul Carson 2021 9-Aug-21 5:43am

Sorry I meant places. A CAD drawing will be made and a list of places will correspond to the map. When a user selects from the list, I would like the map to highlight for that room.

Richard MacCutchan 9-Aug-21 6:18am

Then you will need to create a dictionary of some sort to relate the search names to the positions on the drawing.

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RickZeeland · Answer 1 · 2021-08-09T01:13:00

Solution 1

You could use ColorMatrix() and ImageAttributes() for this, see this CodeProject article:
Color Matrix Image Drawing Effects[^]

Posted 9-Aug-21 1:13am

RickZeeland

Highlighting an area on an image in C#?

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Solution 1

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Highlighting an area on an image in C#?

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Solution 1

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