Develop Reference

How do I load an image at run time?

Hello guys I've tried to call an image at run time in XNA but it gives me an error "file not found" I've given the full path but it keeps returning a error. All I want is load a single image at some point the image does not exist when the game is executed (hard to explain). So I wanted to load this image generated by the game process is it possible?
if (File.Exists(FILE))//Checks if the file exist
ImageTexture = this.Content.Load<Texture2D>(#"C:\FullPath");

A: What is "C:\FullPath"? It's nothing. I very much doubt you have a file there.
B: XNA requires you load a local file if you're going to use Content.Load - it must be in the GamePath/Content folder. EG: GamePath/Content/MySprite.xnb
C: If you want to load a random image, you must use Texture2D.FromStream, like so:
System.IO.FileStream mystream = new System.IO.FileStream("C:/MyFile.png", System.IO.FileAccess.Read);
Image = Texture2D.FromStream(GraphicsDevice, mystream);
mystream.Dispose();

Portability worries because of custom cursor path in C#

I am using a custom cursor named hand2.cur in my C#-WPF application. I have added the cursor to a folder named Images which has all the images that I use in my application. However I've realized that I cannot add relative path to use my custom cursor as:
Cursor newCur = new Cursor("Images\\hand2.cur");
window.Cursor = newCur;
So I used this:
string absolute = System.IO.Path.GetFullPath("hand2.cur");
Cursor newCur = new Cursor(absolute);
window.Cursor = newCur;
This tries to find the hand2.cur file in the \bin\Release folder. So I added the file there and I got it working.
But the problem is, if I Publish this application and use it on a different computer, it does not work. Now the problem is with the cursor file path, because if I deploy it after commenting those 3 lines, it works correctly. So what do I do to rectify this problem?
I am using other images from the Image folder in my XAML code and they seem to port fine. But then again my knowledge of WPF is limited so if anyone has any ideas, that would help.
EDIT: I have added my Images folder to the project. I have also set the Build Action of the cursor file hand2.cur to Embedded Resource. However when I use the following two lines, I get an XAMLParseException.
System.Windows.Resources.StreamResourceInfo info = Application.GetResourceStream(new Uri("pack://application:,,,/Slideshow;component/Images/hand2.cur"));
window.Cursor = new System.Windows.Input.Cursor(info.Stream);
The Inner Exception field when I view the details of the error reads: {"Cannot locate resource 'images/hand2.cur'."}

You could make the cursor a resource in your app/assembly and then use GetResourceStream with the pack Uri to the resources location. Pass the Stream of the StreamResourceInfo to the ctor of the Cursor. e.g.
var info = Application.GetResourceStream(new Uri("pack://application:,,,/Images/hand2.cur"));
var cursor = new Cursor(info.Stream);

I've got this working after I added the cursor file hand2.cur to my Resource1.resx resource file. Then I used the following statement in my code:
window.Cursor = new Cursor(new System.IO.MemoryStream(MyNameSpace.Resource1.hand2));

Null Reference Exception when StreamResourceInfo attempts to get a ResourceStream?

I'm following one of the MSDN Introduction to Windows Phone Development labs, and have run into a problem with this lab (Introduction to Controls Available for Windows Phone Applications). The lab provides both the starting files, and the end files (i.e., what the program should look like upon completion of the lab).
The particular part of the lab that has me stumped is the point where I'm reading in a series of images from an Assets folder, then displaying them in a ListBox on screen. Whenever this code tries to run, it throws a Null Reference Exception:
public static BitmapImage GetImage(string filename)
{
string imgLocation = Application.Current.Resources["ImagesLocation"].ToString();
StreamResourceInfo imageResource = Application.GetResourceStream(new Uri(imgLocation + filename, UriKind.Relative));
BitmapImage image = new BitmapImage();
image.SetSource(imageResource.Stream);
return image;
}
I've dug into as much as I can, and imageResource always winds up Null somehow, and I can't for the life of me figure out where it's going wrong.
I've included a link to the two projects here (129 MB, sorry for that). Everything under the "Begin" folder is what I've done so far (and throws an Exception when I attempt to navigate to the Images page during runtime). Everything under the "End" folder is what it's supposed to end up looking like, and is functional.
I'm very new to C# and WP7 development, so any help would be greatly appreciated. Thank you!

Try to change the build for the .bmp to "Resource".
Here's a couple of links explaining it:
http://forums.silverlight.net/t/238891.aspx/1
Application.GetResourceStream called on a Content Resource still return null

The problem is that when you set your images directory in App.xaml file, there is a mistake in the tutorial. You should set the application resource, ImagesLocation like this:
<system:String x:Key="ImagesLocation">Begin;component/Assets/Images/</system:String>
Where Begin is your project name ;component/ is needed as separator, and finally the Assets/Images/ is the relative path to your images directory.

Copy Image to images directory in WPF

I am developing a WPF application. I am letting user to select some picture and after that i want to save that image in EmployeePics directory which is in same Project directoy.
Here is the screenshot:
I have written following code but its not working:
string appPath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "EmployeePics\\");
File.Copy(Chosen_File, appPath + Chosen_File);
I am getting following exception:

Try to use File.Copy method. If it is not impossible, please, provide more details.
Update:
To resolve pictures directory you could use System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "EmployeePics").
Update 2
Full code:
File.Copy(Chosen_File, Path.Combine(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "EmployeePics"), Path.GetFileName(Chosen_File))).

PNG and jpg images not appearing in C# application

I have a problem with displaying certain images in my application using C#. I am using the Image class to specify the location and the BitmapImage to specify the source. The UriSource is relative and I just specify the name. It worked for some images, but for others, the image simply does not appear. My image instance is 35x35 big and another is 100x100 big (pixels).
Anyone knows why this might be occurring and how to fix it?
Thanks.
Here's the code I used:
Image removeImage = new Image();
removeImage.HorizontalAlignment = HorizontalAlignment.Left;
removeImage.VerticalAlignment = VerticalAlignment.Top;
removeImage.Margin = new Thickness(490, 10, 0, 0);
removeImage.Width = 35;
removeImage.Height = 35;
BitmapImage source = new BitmapImage();
source.BeginInit();
source.UriSource = new Uri("delete.png", UriKind.RelativeOrAbsolute);
source.EndInit();
removeImage.Source = source;
removeImage.Stretch = Stretch.None;
removeImage.Visibility = Visibility.Visible;
removeImage.MouseDown += new MouseButtonEventHandler(removeImage_MouseDown);

Not sure about the location of image files. If images are in your current project folder then you have to set Copy To Output Directory=Copy Always property of image file from Properties Windows.

The best way that I know of to diagnose a problem like that (assuming a quick peer review of the code gets you nowhere), is to use ProcessMonitor: http://technet.microsoft.com/en-us/sysinternals/bb896645
You can use this tool to monitor all of the file activity on your machine (make sure to use the include/exclude filters to limit the noise).
It's very likely that the reason that the images are not showing up is because your application is looking for them in the wrong place (either they didn't get copied, or the relative path is off).
ProcessMonitor will log every attempt that Windows makes to access your .jpg (whether it fails or succeeds). If you search for your file name in the log, you should find it, probably along with an error message, and the full path that Windows was using to open the file.
The most common results I see are
Path that was actually being used was different from the path you needed.
The path was correct, but your files weren't there (build/copy/install problem)
The path was correct, but your web app did not have permissions to read the file.
In all those cases, ProcessMonitor will show you what happened.