Programming Forums > Application Development > C#

csrocker101 · Mar 13th, 2008, 4:13 PM

I'm using the .NET compact Framework to make a phone and trying to load six images into a Bitmap Array. For some reason I keep getting errors at runtime. Here is my code:

(Toggle Plain Text)

public partial class Form1 : Form
    {
        Bitmap[] image = new Bitmap[5];

        public Form1()
        {
                InitializeComponent();

                image[0] = new  Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Black.bmp"));
                image[1] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Blue.bmp"));
                image[2] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Grey.bmp"));
                image[3] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Red.bmp"));
                image[4] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.White.bmp"));
                image[5] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Yellow.bmp"));       
        }

I Think it has something to do with where I am placing my files. But I added them the correct way by right-clicking my project in the solution explorer->Open->Resources->Add Resources->Add existing item but...it's still not working! It compiles but at run time I get exceptions saying "NullReferenceException." I have put the images files EVERYWHERE. I put them in the debug file as well and it's still not working!! Any Ideas on what I am doing wrong??

Arla · Mar 13th, 2008, 4:40 PM

I'd guess it's as easy as your statement

(Toggle Plain Text)

Bitmap[] image = new Bitmap[5];

You're only allowing for 5 things, yet you're adding 6, therefore the last one is going to bomb out (think that's it from a very quick review).

csrocker101 · Mar 13th, 2008, 9:59 PM

I don't think that has anything to do with it since 0 is counts as an index in the array..as in 0, 1, 2, 3 4, 5...Plus I think if that was the problem it would give me an array out of bounds exception

Dameon · Mar 13th, 2008, 10:45 PM

new Bitmap[5] creates an array of 5 bitmaps, indices 0 through 4.

You are correct that you would get a bounds exception. And you will, when you fix the first one. The exception is happening somewhere before the image[5] = line.

BstrucT · Mar 14th, 2008, 12:29 AM

Just a thought, I am probably wrong, but had a similar problem.

Are all the image files you are importing in the same format?

Worth having a double look.

>BstrucT<

csrocker101 · Mar 14th, 2008, 9:30 AM

Ya all the images are in ".bmp" format. I am using the .NET compact framework and apparently I read somewhere that mobile devices (including the emulator) cannot read files from a computers Hard drive directory. I tried referencing it directly from my hard drive by using:

(Toggle Plain Text)

image[0] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("C:\\Documents and Settings\\Kevin Brunette\\Desktop.Mobile Apps and Devices (200600255)\\Mobile Apps and Devices (200600255)\\Resources\\Black.bmp"))

And this time I get a "DirectoryNotFoundException" but how cant that be when the file is there! I have put it everywhere in the debug folder, added a folder in the solution explorer called "resources" and tried to reference from that and STILL getting the same exceptions.

mbd · Mar 14th, 2008, 10:41 AM

my advice would be to step through your progam in the debugger and add all those function calls as watches. i might separate the
"...new Bitmap(Assembly..." part into two lines so it would be easier to inspect the return value of getmanifestresourcestream.

csrocker101 · Mar 16th, 2008, 4:00 PM

I FINALLY FIXED the problem. The .NET framework apparently can't recognize drive spaces and files on a normal computer so you have to make the resources embedded. By doing the following...

[code]class ImageFiles
{
image[0] = Properties.Resources.Red;
}

It fixed the problem and now works perfectly!

BstrucT · Mar 17th, 2008, 12:57 AM

Cool man, will make a make a note of that for myself in my C# file for future reference.
hehe, glad you got it sorted.

Mar 13th, 2008, 4:13 PM	#1
csrocker101 Programmer Join Date: Dec 2006 Posts: 47 Rep Power: 0	Help loading images into Bitmap Array I'm using the .NET compact Framework to make a phone and trying to load six images into a Bitmap Array. For some reason I keep getting errors at runtime. Here is my code: (Toggle Plain Text) public partial class Form1 : Form { Bitmap[] image = new Bitmap[5]; public Form1() { InitializeComponent(); image[0] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Black.bmp")); image[1] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Blue.bmp")); image[2] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Grey.bmp")); image[3] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Red.bmp")); image[4] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.White.bmp")); image[5] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Yellow.bmp")); } public partial class Form1 : Form { Bitmap[] image = new Bitmap[5]; public Form1() { InitializeComponent(); image[0] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Black.bmp")); image[1] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Blue.bmp")); image[2] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Grey.bmp")); image[3] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Red.bmp")); image[4] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.White.bmp")); image[5] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("Mobile Apps and Devices.Resources.Yellow.bmp")); } I Think it has something to do with where I am placing my files. But I added them the correct way by right-clicking my project in the solution explorer->Open->Resources->Add Resources->Add existing item but...it's still not working! It compiles but at run time I get exceptions saying "NullReferenceException." I have put the images files EVERYWHERE. I put them in the debug file as well and it's still not working!! Any Ideas on what I am doing wrong??

Mar 13th, 2008, 4:40 PM	#2
Arla Hobbyist Programmer Join Date: Mar 2005 Posts: 164 Rep Power: 4	Re: Help loading images into Bitmap Array I'd guess it's as easy as your statement (Toggle Plain Text) Bitmap[] image = new Bitmap[5]; Bitmap[] image = new Bitmap[5]; You're only allowing for 5 things, yet you're adding 6, therefore the last one is going to bomb out (think that's it from a very quick review).

Mar 13th, 2008, 9:59 PM	#3
csrocker101 Programmer Join Date: Dec 2006 Posts: 47 Rep Power: 0	Re: Help loading images into Bitmap Array I don't think that has anything to do with it since 0 is counts as an index in the array..as in 0, 1, 2, 3 4, 5...Plus I think if that was the problem it would give me an array out of bounds exception

Mar 13th, 2008, 10:45 PM	#4
Dameon Troll Join Date: Apr 2005 Location: Texas Posts: 732 Rep Power: 4	Re: Help loading images into Bitmap Array new Bitmap[5] creates an array of 5 bitmaps, indices 0 through 4. You are correct that you would get a bounds exception. And you will, when you fix the first one. The exception is happening somewhere before the image[5] = line. __________________ MD5(sig) = bcef75433db02e9ad9bf81d6f7c5c270

Mar 14th, 2008, 12:29 AM	#5
BstrucT Hobbyist Programmer Join Date: Dec 2007 Location: Durban, South-Africa Posts: 175 Rep Power: 1	Re: Help loading images into Bitmap Array Just a thought, I am probably wrong, but had a similar problem. Are all the image files you are importing in the same format? Worth having a double look. >BstrucT< __________________ The more the human race tries to change everything, when not needed, the less will they be able to change themselves when they need to.

Mar 14th, 2008, 9:30 AM	#6
csrocker101 Programmer Join Date: Dec 2006 Posts: 47 Rep Power: 0	Re: Help loading images into Bitmap Array Ya all the images are in ".bmp" format. I am using the .NET compact framework and apparently I read somewhere that mobile devices (including the emulator) cannot read files from a computers Hard drive directory. I tried referencing it directly from my hard drive by using: (Toggle Plain Text) image[0] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("C:\\Documents and Settings\\Kevin Brunette\\Desktop.Mobile Apps and Devices (200600255)\\Mobile Apps and Devices (200600255)\\Resources\\Black.bmp")) image[0] = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("C:\\Documents and Settings\\Kevin Brunette\\Desktop.Mobile Apps and Devices (200600255)\\Mobile Apps and Devices (200600255)\\Resources\\Black.bmp")) And this time I get a "DirectoryNotFoundException" but how cant that be when the file is there! I have put it everywhere in the debug folder, added a folder in the solution explorer called "resources" and tried to reference from that and STILL getting the same exceptions.

Mar 14th, 2008, 10:41 AM	#7
mbd Programmer Join Date: Nov 2007 Posts: 86 Rep Power: 1	Re: Help loading images into Bitmap Array my advice would be to step through your progam in the debugger and add all those function calls as watches. i might separate the "...new Bitmap(Assembly..." part into two lines so it would be easier to inspect the return value of getmanifestresourcestream.

Mar 16th, 2008, 4:00 PM	#8
csrocker101 Programmer Join Date: Dec 2006 Posts: 47 Rep Power: 0	Re: Help loading images into Bitmap Array I FINALLY FIXED the problem. The .NET framework apparently can't recognize drive spaces and files on a normal computer so you have to make the resources embedded. By doing the following... [code]class ImageFiles { image[0] = Properties.Resources.Red; } It fixed the problem and now works perfectly!

Mar 17th, 2008, 12:57 AM	#9
BstrucT Hobbyist Programmer Join Date: Dec 2007 Location: Durban, South-Africa Posts: 175 Rep Power: 1	Re: Help loading images into Bitmap Array Cool man, will make a make a note of that for myself in my C# file for future reference. hehe, glad you got it sorted. __________________ The more the human race tries to change everything, when not needed, the less will they be able to change themselves when they need to.

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Programming Forums > Application Development > C#

Help loading images into Bitmap Array