The Bitmap.FromResource() function

[DJ Trauma]

Hi all. I'm trying to use the Bitmap.FromResource() function in C#, but I don't understand the first part of the syntax -> 'System.IntPntr hInstance'.

Could someone explain me what I have to fill in there. I guess it must be some sort of pointer to my program. I tried a couple of things, including 'IntPtr.Zero', but it doesn't work. The program gives me the following error:

System.ArgumentException: Invalid parameter used

Is there someone who knows how to fix this? Thx in advance.

[Andareed]

HINSTANCE and HMODULE are the base addresses of any exe/dll/images loaded into memory. Are you loading the resource from your executable? If yes, you can use 0 (IntPtr.Zero?). If you are loading from a dll, how are you loading the dll?

[DJ Trauma]

I added the bitmap resource directly to the project (in VSNET -> right-click on Project title -> Add -> Bitmap ...) and so I guess it's loading from my executable, but IntPtr.Zero keeps giving me the error.

[azcodemonkey]

Try using this method.

Bitmap _bmp;

_bmp = new Bitmap(GetType(), "name_of_resource.bmp");

[DJ Trauma]

Nope, it doesn't work. I get the following error returned:

System.ArgumentException: Source 1.bmp cannot be found in the class Elvish_Dance.Form1.

at System.Drawing.Bitmap..ctor(Type type, String resource)

at Elvish_Dance.Form1.timer_Tick(Object sender, EventArgs e) in c:\documents and settings\djtrauma\mijn documenten\visual studio projects\elvish dance\elvish dance\form1.cs:line 146

at System.Windows.Forms.Timer.OnTick(EventArgs e)

at System.Windows.Forms.Timer.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr idEvent, IntPtr dwTime)

Part of my code:

Bitmap _bmp;

 ?	switch(gen)
 ?	{
 ? ?case 1:
 ? ?	_bmp = new Bitmap(GetType(), "1.bmp");
 ? ?	screen.Image = _bmp;
 ? ?	break;
 ? ?case 2:
 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ...

[WebWacker]

One solution would be this:

Select the resource in your Solution Explorer and change the "Build Action" property to "Embedded Resource".

When a resource is added like that, it can be accessed from the Assembly.

public Stream GetEmbeddedFile(string Name)
{
     try
     {
          Assembly asm = Assembly.GetExecutingAssembly();
          return asm.GetManifestResourceStream(Name);
     }
     catch
     {
          return null;
     }
}

This method returns any embedded resource as a stream, or null when an exception occurs.

The Name parameter should include the AssemblyName, something like: MyApplication.1.bmp

A Bitmap can be created by using Bitmap.FromStream(...);

Hope this helps :)

[DJ Trauma]

Thank you so much, WebWacker (and all the others too of course) :) Your solution works perfectly.