Return a Bitmap as IPicture

[Yoavo]

Hi,
I am writing a COM class in c# which needs to implement an interface which
one of its methods declared in the following way:
public stdole.IPicture GetBitmap()
{
}

I have a bitmap (MyBitmap.bmp) in my c# application and I want to load it,
and return it as a return value of the method GetBitmap.
I created a System.Drawing. Bitmap object and load it with MyBitmap.bmp file.
Now, I tried to convert my Bitmap object to stdole.IPicture , but I dont know
how to do it.

Can someone please help (or suggest a different approach) ?

thanks,
Yoav.

[Dave Sexton]

Hi Yoavo,

System.Drawing. Bitmap does not implement the OLE IPicture interface. You'll
have to create your own implementation of that interface to wrap the Bitmap
object.

Actually, just on a hunch I searched for IPicture in the VS.NET 2005 object
browser and I discovered the following method:

System.Windows. Forms.AxHost.Ge tIPictureFromPi cture(System.Dr awing.Image)

Take a look at some of the other AxHost methods that deal with IPicture as
well. They may come in handy.

- Dave Sexton

"Yoavo" <yo**@cimatron. co.ilwrote in message
news:O%******** ********@TK2MSF TNGP03.phx.gbl. ..

Hi,
I am writing a COM class in c# which needs to implement an interface which
one of its methods declared in the following way:
public stdole.IPicture GetBitmap()
{
}

I have a bitmap (MyBitmap.bmp) in my c# application and I want to load it,
and return it as a return value of the method GetBitmap.
I created a System.Drawing. Bitmap object and load it with MyBitmap.bmp
file.
Now, I tried to convert my Bitmap object to stdole.IPicture , but I dont
know how to do it.

Can someone please help (or suggest a different approach) ?

thanks,
Yoav.

[Nicholas Paldino [.NET/C# MVP]]

Unfortunately, this won't work. It is protected.

Instead, set a reference to Microsoft.Visua lBasic.Compatab ility, and
call either the static ImageToIPicture ir ImageToIPicture Disp methods on the
Support class in the Microsoft.Visua lBasic.Compatab ility.VB6 namespace.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Dave Sexton" <dave@jwa[remove.this]online.comwrote in message
news:%2******** ********@TK2MSF TNGP04.phx.gbl. ..

Hi Yoavo,

System.Drawing. Bitmap does not implement the OLE IPicture interface.
You'll have to create your own implementation of that interface to wrap
the Bitmap object.

Actually, just on a hunch I searched for IPicture in the VS.NET 2005
object browser and I discovered the following method:

System.Windows. Forms.AxHost.Ge tIPictureFromPi cture(System.Dr awing.Image)

Take a look at some of the other AxHost methods that deal with IPicture as
well. They may come in handy.

- Dave Sexton

"Yoavo" <yo**@cimatron. co.ilwrote in message
news:O%******** ********@TK2MSF TNGP03.phx.gbl. ..

>Hi,
I am writing a COM class in c# which needs to implement an interface
which one of its methods declared in the following way:
public stdole.IPicture GetBitmap()
{
}

I have a bitmap (MyBitmap.bmp) in my c# application and I want to load
it, and return it as a return value of the method GetBitmap.
I created a System.Drawing. Bitmap object and load it with MyBitmap.bmp
file.
Now, I tried to convert my Bitmap object to stdole.IPicture , but I dont
know how to do it.

Can someone please help (or suggest a different approach) ?

thanks,
Yoav.

[Yoavo]

Hi Nicholas,
I tried to follow your instructions but I cant create
"Microsoft.Visu alBasic.Compata bility":
The only member of "Microsoft.Visu alBasic" is
"Microsoft.Visu alBasic.VBCodeP rovider"...
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote in
message news:%2******** ********@TK2MSF TNGP05.phx.gbl. ..

Unfortunately, this won't work. It is protected.

Instead, set a reference to Microsoft.Visua lBasic.Compatab ility, and
call either the static ImageToIPicture ir ImageToIPicture Disp methods on
the Support class in the Microsoft.Visua lBasic.Compatab ility.VB6
namespace.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Dave Sexton" <dave@jwa[remove.this]online.comwrote in message
news:%2******** ********@TK2MSF TNGP04.phx.gbl. ..

>Hi Yoavo,

System.Drawing .Bitmap does not implement the OLE IPicture interface.
You'll have to create your own implementation of that interface to wrap
the Bitmap object.

Actually, just on a hunch I searched for IPicture in the VS.NET 2005
object browser and I discovered the following method:

System.Windows .Forms.AxHost.G etIPictureFromP icture(System.D rawing.Image)

Take a look at some of the other AxHost methods that deal with IPicture
as well. They may come in handy.

- Dave Sexton

"Yoavo" <yo**@cimatron. co.ilwrote in message
news:O%******* *********@TK2MS FTNGP03.phx.gbl ...

>>Hi,
I am writing a COM class in c# which needs to implement an interface
which one of its methods declared in the following way:
public stdole.IPicture GetBitmap()
{
}

I have a bitmap (MyBitmap.bmp) in my c# application and I want to load
it, and return it as a return value of the method GetBitmap.
I created a System.Drawing. Bitmap object and load it with MyBitmap.bmp
file.
Now, I tried to convert my Bitmap object to stdole.IPicture , but I dont
know how to do it.

Can someone please help (or suggest a different approach) ?

thanks,
Yoav.

[Dave Sexton]

Hi Yoavo,

Nicholas is correct, the method is protected static however it's documented
on MSDN so I don't see why you can't use it. If his VB assembly suggestion
doesn't work for you here is some code that will wrap the
AxHost.GetIPict ureFromPicture method for you, keeping the actual
implementation private since it's a bit ugly. Also, keep in mind that you
don't get intellisense for the call to "AxHost.GetIPic tureFromPicture "
because it's marked with EditorBrowsable (false), but I tested the code and
it compiles and executes just fine:

public static class ImageUtilities
{
public static object ConvertToIPictu re(Image image)
{
return ImageOLEConvert er.Instance.Con vertToIPicture( image);
}

private class ImageOLEConvert er : AxHost
{
public static readonly ImageOLEConvert er Instance = new
ImageOLEConvert er();

private ImageOLEConvert er()
: base(Guid.Empty .ToString())
{
}

public object ConvertToIPictu re(Image image)
{
return AxHost.GetIPict ureFromPicture( image);
}
}
}

In your code, just call ImageUtilities. ConvertToIPictu re(myImage).

HTH

"Yoavo" <yo**@cimatron. co.ilwrote in message
news:%2******** **********@TK2M SFTNGP05.phx.gb l...

Hi Nicholas,
I tried to follow your instructions but I cant create
"Microsoft.Visu alBasic.Compata bility":
The only member of "Microsoft.Visu alBasic" is
"Microsoft.Visu alBasic.VBCodeP rovider"...
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote
in message news:%2******** ********@TK2MSF TNGP05.phx.gbl. ..

> Unfortunately, this won't work. It is protected.

Instead, set a reference to Microsoft.Visua lBasic.Compatab ility, and
call either the static ImageToIPicture ir ImageToIPicture Disp methods on
the Support class in the Microsoft.Visua lBasic.Compatab ility.VB6
namespace.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Dave Sexton" <dave@jwa[remove.this]online.comwrote in message
news:%2******* *********@TK2MS FTNGP04.phx.gbl ...

>>Hi Yoavo,

System.Drawin g.Bitmap does not implement the OLE IPicture interface.
You'll have to create your own implementation of that interface to wrap
the Bitmap object.

Actually, just on a hunch I searched for IPicture in the VS.NET 2005
object browser and I discovered the following method:

System.Window s.Forms.AxHost. GetIPictureFrom Picture(System. Drawing.Image)

Take a look at some of the other AxHost methods that deal with IPicture
as well. They may come in handy.

- Dave Sexton

"Yoavo" <yo**@cimatron. co.ilwrote in message
news:O%****** **********@TK2M SFTNGP03.phx.gb l...
Hi,
I am writing a COM class in c# which needs to implement an interface
which one of its methods declared in the following way:
public stdole.IPicture GetBitmap()
{
}

I have a bitmap (MyBitmap.bmp) in my c# application and I want to load
it, and return it as a return value of the method GetBitmap.
I created a System.Drawing. Bitmap object and load it with MyBitmap.bmp
file.
Now, I tried to convert my Bitmap object to stdole.IPicture , but I dont
know how to do it.

Can someone please help (or suggest a different approach) ?

thanks,
Yoav.