C# draw on a image

[raala]

Dear experts,
Iwant t,o
1.open an existing image (in the form i need browse button from with i should be able to locate the file)
2.Draw some rectangles on it.
3.save new image as a jpeg also by browsing and locating the plase

plz give me steps and codes.

[Plater]

Look at the Bitmap and Graphics objects, they contain the bulk of your work. The OpenFileDialog and SaveFileDialog will help you with file selecting.
Please research and do your own work

[raala]

Actually I’m new to C#.NET really appreciate if you could tell me what ihave to do step wise and please give me the cording.

[IanWright]

@raala
Well it doesn't really work like that on here. People like to see you do your own work...

Browsing : Look at the OpenFileDialog class as mentioned, this will allow you to browse to your file.

Drawing rectangles... take a look at Graphics.FromImage() and then Graphics.DrawRectangle().

Saving... Look at Bitmap.Save()

That's a little bit more information than you've been given. If you're not sure where to look try typing "MSDN OpenFileDialog". It's got everything on there, and often with good examples.

[raala]

thanx for your reply. But I can't understand what is ment my"people like to see you do your own work.."

[Bassem]

Hi raala,
Don't wast your time posting "thanks" and "what did you mean?" instead check class Bitmap as Plater an IanWright said.
With Bitmap you can get to the data of the image (pixels) modify as you wish.
Use OpenFileDialog control and SaveFileDialog, so easy to use.

When you've any problem, post your code and we'll be glad to help you.

Regards,
Bassem

[Plater]

@raala
It means we're not here to do your work for you. We have given you more than enough to accomplish your task. Its up to you to look up how to use those classes and implement it.

[Frinavale]

@raala
Hi Raala,


All the information you need on the Graphics class, Bitmap class, and any other .NET classes or controls can be found in the MSDN Library. This resource should get you pointed in the right direction. I recommend bookmarking the MSDN Library and using it as your primary resource when developing in .NET.

You're also going to be interested in using the OpenFileDialog. This lets the user browse for a file and will give you a path to the file they selected.

Once you have a path to the file you need to open it. There are a number of classes available to you in .NET that will let you open files. These are found in the System.IO namespace. The File class in the System.IO namespace has a bunch of methods that let you do things like open, copy, move files.

First try loading an image and saving it.
Then try moving on from there.

-Frinny