How can I set a dynamic resource path?

Question

I want to access my resources this way:

string iconVar = "20"; imgIcon.Image = "Properties.Resources." + iconVar;

This is not possible because I give a string and not an image.

So the question is, how can I access the resources without giving the name of the resource in the code?

I know normally you should use

imgIcon.Image = Properties.Resources.image1;

The thing is, I don't know yet if it's gonna be image1 or image 2 that I'm gonna use.

I tried this:

imgIcon.ImageLocation = "pack://application:,,,/project1;component/Properties.Resources._" + iconVar; imgIcon.Refresh();

But that doesn't seem to work.

check this question: stackoverflow.com/questions/7873453/… — w.b
– w.b, Commented Jan 1, 2014 at 17:34

Community · Accepted Answer · 2017-05-23 12:11:34Z

You say you do not know yet what image you will use, why is this? And is there a reason you want to determine what image you want based on a string?

If you plan on setting the images based on certain conditions, you could try this instead of working with a string:

Image image1 = Properties.Resources.image1; Image image2 = Properties.Resources.image2; imgIcon.Image = someBool ? image1 : image2;

If you have not decided yet what image you want for the final version and you want to easily change it everywhere in your code simultaneously, define the image as a global variable and use the variable.

Edit:

To load an image based on the name of said image, you could try the following (not tested myself, but taken from this answer):

imgIcon.Image = (Image)Resources.ResourceManager.GetObject("20");

In my resources I have icon 1 till icon 500. Via a web request (json) I get the number of which icon I'm gonna use. Then I want to display that icon in a picturebox. I could use 500 cases. But that's not really clean. Hope I explained enough. Thanks for the answer though!
@FCJesse Have a look at the update, I added a way of loading a resource based on a string.

Grant Winney · Accepted Answer · 2014-01-01 17:33:29Z

I'll make a few assumptions:

you're using WinForms
you've already added the image to your project resources as an "image"
the imgIcon control is a PictureBox

If that's all true, then you should be able to assign it directly.

imgIcon.Image = Properties.Resources.YourImageName

I'm not sure what you mean by "without giving the name of the resource". If you want to specify an image, you'll have to give its name.

Sorry for not enough information. That's basically it. But the thing is, I don't know if I want to use YourImageName1 or YourImageName2.
I know. What I mean is, I have a string, the string is the name of the resource. The string is called iconVar. iconVar can either be image1, image2.

Alberto · Accepted Answer · 2014-01-01 17:34:50Z

If we are talking about wpf, I think you need something like this:

BitmapImage bi = new BitmapImage(); bi.BeginInit(); bi.UriSource = new Uri("pack://application:,,,/YourApplicationName;component/Properties.Resources."+iconVar, UriKind.RelativeOrAbsolute); bi.EndInit(); imgIcon.Image.Source = bi;

make sure to replace YourApplicationName with your actual application name (the name of the assembly/exe)

I'm using WinForms so I did this: imgIcon.ImageLocation = "pack://application:,,,/project1;component/Properties.Resources._" + iconVar; It doesn't seem to work.
I only used the trick with the "pack://". I didn't copy his code.

FC Jesse · Accepted Answer · 2014-01-02 18:00:54Z

I fixed it. This is the code I used:

Assembly _assembly; Stream _imageStream; _assembly = Assembly.GetExecutingAssembly(); _imageStream = _assembly.GetManifestResourceStream("project.Resources._" + iconVar + ".png"); imgIcon.Image = new Bitmap(_imageStream);

Thanks you for your responses!

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