Read from content resource file

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I added an image in resource file and read it. It was easy.
But when i changed the build action to content and then tried to read it, gave me exception.

C#

var rm = new ResourceManager("Resource1", System.Reflection.Assembly.GetExecutingAssembly());
pictureBox1.Image = (Bitmap)rm.GetObject("excel");

does any one has an idea on this.

Posted 26-Apr-11 18:34pm

nitin_ion

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Sergey Alexandrovich Kryukov 27-Apr-11 0:58am

Tag it! Language, platform, version... How an expert can pay attention for the question of interest?
--SA

3 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-04-26T19:06:00

Solution 3

Typically, in practice, this is much more easy than that. You usually don't need to write any code.

Let's take your bitmap. Create an new .resx file, open it, go to the menu on top and click "Resources"... "Add existing file". Browse and load the bitmap file, say "MyPicture.png". It will add a copy of "MyPicture.png" to your project and a link to this file in your resource.

You resource will create two nodes in solution explorer: .resx file and its child node with auto-generated .cs file. Open this file, locate a static class and its static property with the name close to the name of your bitmap file, something like "MyPicture". This is your bitmap, a static property you should use to access your bitmap in your resource.

Use it!
Don't use ResourceManager or anything like that — it is already done for you!

[EDIT]

In connection to discussion:

If you need to read a nearly permanent file (like a resource, something not modified during run time), place it in executable directory or a relative path relative to the executable directory. Here is how to calculate it:

C#

string exePath =
    System.IO.Path.GetDirectoryName(
       System.Reflection.Assembly.GetEntryAssembly().Location);

—SA

Posted 26-Apr-11 19:06pm

Sergey Alexandrovich Kryukov

Updated 26-Apr-11 21:53pm

v2

Comments

nitin_ion 27-Apr-11 1:11am

I tried it also but when i refer it

pictureBox1.Image = Resource1.excel;

it gives error

"Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "WindowsFormsApplication1.Resource1.resources" was correctly embedded or linked into assembly"

My resource file is content [build action] and public [access modifier]

Sergey Alexandrovich Kryukov 27-Apr-11 1:29am

Something is broken, I don't know what. Did you make sure your source bitmap file (what is it, excel.png?) is a valid bitmap showing correctly with some viewer?

When I do it from scratch it always works right away.
--SA

Abhinav S 27-Apr-11 1:43am

Yeah. Different approach. 5.

Sergey Alexandrovich Kryukov 27-Apr-11 3:17am

Thank you, Abhinav.
I just figured out OP does not need any embedded resources at all. Just a bad confusion. Please see below. Not my fault. (Sigh...)
--SA

nitin_ion 27-Apr-11 1:44am

Yes image is bitmap and it does show it in image editors. If you have a sample code can you send me.
My purpose for this is to update resource files only instead of updating the exe everytime.

Sergey Alexandrovich Kryukov 27-Apr-11 3:16am

OK, this is a problem to be fixed first.

>If you have a sample code can you send me.
Can I? Thank you very much! What source code? I just explained, no coding needed.

What a confusion! If your purpose if updating it without recompilation, forget about embedding resource. Add the file just to a project, go to its property and make sure it is copied to output path. In this way, some file will be there by default, but you can update/replace it at any time in the deployed location. That's it. (Sigh...)
--SA

nitin_ion 27-Apr-11 3:30am

what you are saying is correct but this also does it.
ResXResourceReader r = new ResXResourceReader("C:\\Users\\njain\\Documents\\Visual Studio 2008\\Projects\\WindowsFormsApplication1\\WindowsFormsApplication1\\Resource1.resx");
foreach (DictionaryEntry d in r)
{
pictureBox1.Image =(Image) d.Value;
}

//Close the resxReader
r.Close();

Sergey Alexandrovich Kryukov 27-Apr-11 3:49am

No, it makes no sense if you need to replace the resource without recompilation. It won't work. Just read the separate file, not embedded in an executable resource. Also, never use absolute path -- it won't work.

Please see how to calculate the path in my updated answer (after [EDI]). Careful: there are other methods like using "main" or command line arguments or some other -- they are not portable, did not work in identical way for different hosting!
--SA

Abhinav S · Answer 2 · 2011-04-26T18:38:00

Solution 1

A file setup for build action Content as shown below will not be included in the assembly. As a result whe you try to load the file using the resource manager you get an error. You might want to check out msdn for more details on build actions.

Posted 26-Apr-11 18:38pm

Abhinav S

Comments

Sergey Alexandrovich Kryukov 27-Apr-11 1:07am

I think it needs much more simple approach.
Please see my answer.
--SA

Abhinav S 27-Apr-11 1:43am

I just explained to him why he gets the error :).

Tarun.K.S 27-Apr-11 14:49pm

Correct.

nitin_ion · Answer 3 · 2011-04-26T18:55:00

I tried reading it as xml and it did worked

C#

var x = new XmlDocument();
               XmlNode rootNode;
               x.Load("C:\\Users\\njain\\Documents\\Visual Studio 2008\\Projects\\WindowsFormsApplication1\\WindowsFormsApplication1\\Resource1.resx");
               rootNode = x.SelectSingleNode("root");
               foreach (XmlNode Node in rootNode)
               {
                   if ((Node.Name == "data") && Node.Attributes["name"].Value == "excel")
                   {
                       var cc = Node.LastChild.LastChild.Value;
                       var c=cc.Split(';');
                   }
               }

Read from content resource file

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