Re: Saving image - C# Discussion Boards

22-Apr-05 9:23

I know PHP and Java, and I'm just starting to learn C#, so I don't know many of the C# methods.

I'm trying to write a method that will open a bmp image and save it on the hard drive. I want to compile the image with the program, so I added it as an item in the Solution Explorer, but now I dont know how to access it.

What method do I use to access it?

Thanks

Polis Pilavas22-Apr-05 9:46

22-Apr-05 9:46

wetdog500 wrote:
so I added it as an item in the Solution Explorer

Umm.. what exactly did u added and how?

To open a bitmap and save it somewhere else on ur machine you could say:

// Create an instance of the Bitmap class and reference an actual<br />
// bitmap on your machine<br />
System.Drawing.Bitmap myB = new System.Drawing.Bitmap(@"C:\myBitmap.bmp");<br />
<br />
// Save the bitmap somewhere<br />
myB.Save("......");

Regards,
Polis

Can you practice what you teach?

wetdog50022-Apr-05 9:54

22-Apr-05 9:54

In the Solutions Explorer I right clicked on my project's name then went to 'Add', 'Add Existing Item...'.

Next I selected a .bmp image and hit enter.

Does that help?

Polis Pilavas22-Apr-05 9:58

22-Apr-05 9:58

wetdog500 wrote:
In the Solutions Explorer I right clicked on my project's name then went to 'Add', 'Add Existing Item...'.

Well, not really. What you did, is just adding a specific bitmap image as a resource into your solution. If all u need is opening a bitmap during runtime and save it somewhere else, you just have to follow the small code sample I provided you with before.. or something similar.

Hope this helps

Regards,
Polis

Can you practice what you teach?

wetdog50022-Apr-05 10:09

22-Apr-05 10:09

Thanks, but what path do I use to access the image?

Polis Pilavas22-Apr-05 10:21

22-Apr-05 10:21

Well, that's up to you.

I think that you would want your users to be able to specify the path to a bitmapt for themselves by browsing for a specific file or typing down the filename path for themselves. It wouldn't really made much sense to just specify a fixed filename path in your code right?

A simple example:
You could drop two textboxes and a button on your form. The users would then type a path to a bitmap in the first textbox, the new path to which the bitmap will be copied in the second textbox (if it does exists under that path), and finally press the button to actually copy the bitmap.

On the button click event you could have something like this:

// First get the bitmap's original path<br />
Bitmap myBitmap = new Bitmap(this.textbox1.text);<br />
<br />
// Copy the bitmap to the new path<br />
myBitmap.Save(this.textbox2.text);

A small tip:
Btw, you would have to provide some checkups. E.g. make sure that the path names the user provided are valid before attempting to load a bitmap. Or, make sure that the user HAS provided paths for both textboxes.

Regards,
Polis

Can you practice what you teach?

wetdog50022-Apr-05 10:30

22-Apr-05 10:30

No, I'm sorry I didn't explain myself well enough.

I want to have the user copy a resource in my program, not on the hard disk, to a loction on their hard disk.

How do I access that resource?

Polis Pilavas22-Apr-05 10:40

22-Apr-05 10:40

wetdog500 wrote:
How do I access that resource?

To programmatically access one of your resources you could say something like:

Assembly myAssembly = GetExecutingAssembly();
Stream resourceStream = myAssembly.GetManifestResourceStream("myBitmap.bmp");
Bitmap image = new Bitmap(resourceStream);

wetdog500 wrote:
I want to have the user copy a resource in my program

I am not sure whether you can do that. Resources are part of your assembly and are included in it every time you compile your program

Regards,
Polis

Can you practice what you teach?

wetdog50022-Apr-05 10:51

22-Apr-05 10:51

Thanks!

Polis Pilavas22-Apr-05 10:53

22-Apr-05 10:53

It's alright. Glad I could help

Regards,
Polis

Can you practice what you teach?

Cool: MessageBox.Show(3.1415927.ToString());

jinzhecheng23-Apr-05 9:00

jinzhecheng

23-Apr-05 9:00

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbtskretrievingresourceswithresourcemanager.asp[^]

look at this.

Member 9622-Apr-05 8:04

Member 96

22-Apr-05 8:04

I didn't know you could do that but it makes sense now that I think about it.

"If there is a God, atheism must seem to Him as less of an insult than religion." - Edmond de Goncourt

turbochimp22-Apr-05 8:28

turbochimp

22-Apr-05 8:28

It is cool indeed, although I have to assume your example is contrived since just using "3.1415927" would have avoided boxing the numeric value (as well as a call to the member function 'ToString()').
In general, gratuitous boxing/unboxing is discouraged because of its performance cost, although the ability to box/unbox value types clearly serves a purpose, and is ingrained into the .Net Framework - the ArrayList type is a perfect example.

The most exciting phrase to hear in science, the one that heralds the most discoveries, is not 'Eureka!' ('I found it!') but 'That's funny...’

DavidNohejl22-Apr-05 9:18

DavidNohejl

22-Apr-05 9:18

And does it return "pi" or "π" ? Roll eyes | :rolleyes:

David

Never forget: "Stay kul and happy" (I.A.)

David's thoughts / dnhsoftware.org / MyHTMLTidy

turbochimp22-Apr-05 9:38

turbochimp

22-Apr-05 9:38

Neither. The framework doesn't return 'pi' until you have at least 20 significant digits.

Poke tongue | ;-P

The most exciting phrase to hear in science, the one that heralds the most discoveries, is not 'Eureka!' ('I found it!') but 'That's funny...’