"Roger Beniot" <roger_beniot@yahoo.com> wrote in message
news:1127942167.859674.189360@z14g2000cwz.googlegroups.com...
>I am trying to add EXIF properties to my JPEG pictures taken w/ a Canon
> digital camera. The fields I want to add related to GPS data.
>
> I have tried the suggestions listed at:
> http://www.pixvillage.com/blogs/devblog/archive/2005/03/27/176.aspx
>
> I have tried the following:
> 1) adding an image w/ PropertyItems to the assembly as a resource,
> loading the resource, getting a property item, changing the property
> item values, setting the property item to my Image and saving (using
> the various implementations of Image.Save)
>
> 2) using reflection to get the PropertyItem constructor (yes not the
> recommneded way but worth a try).
>
> 3) just loading an image w/ PropertyItems, getting a property item,
> changing the property item values, setting the property item on my
> image and saving the image.
>
> 4) also tried getting the JPEG image encoder and using it
>
> In all cases the new property item is added but when I save the image
> and then enumerator through the PropertyItems my new property is not
> there.
>
> I have tried saving as the original file, a different file name, etc.
>
>
> Here is a very simple snip of what I've tried doing (C#):
>
> Bitmap bmp = (Bitmap) Bitmap.FromFile(BASE_FILE);
>
> PropertyItem pi = bmp.GetPropertyItem(0x10f);
> pi.Id = 0x8825;
> pi.Type = 2;
> pi.Value = data;
> pi.Len = data.Length;
>
> bmp.SetPropertyItem(pi);
>
> PropertyItem propItem = bmp.GetPropertyItem(0x8825);
>
> bmp.Save(NEW_FILE2);
>
>
> Thanks,
> Roger
>

"Roger Beniot" <roger_beniot@yahoo.com> wrote in message
news:1127958349.910369.292090@o13g2000cwo.googlegroups.com...
> Michael... what documentation are you looking at (provide a link)?...
>
> Everything I've read says it is supported:
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdicpp/GDIPlus/GDIPlusreference/constants/imagepropertytagconstants/propertyitemdescriptions.asp
>
> Plus it shouldn't make any difference... I should be able to add any
> custom/non-supported property and have it correctly saved to the file.
> I have tried adding a variety of different image properties (copyright,
> description, artist, etc) and none of those save either.
>
> -roger
>
> Michael Phillips, Jr. wrote:
>> The MSDN documentation states that PropertyTagGpsIFD is not exposed by
>> gdi+
>> for public use.
>>
>>
>> "Roger Beniot" <roger_beniot@yahoo.com> wrote in message
>> news:1127942167.859674.189360@z14g2000cwz.googlegroups.com...
>> >I am trying to add EXIF properties to my JPEG pictures taken w/ a Canon
>> > digital camera. The fields I want to add related to GPS data.
>> >
>> > I have tried the suggestions listed at:
>> > http://www.pixvillage.com/blogs/devblog/archive/2005/03/27/176.aspx
>> >
>> > I have tried the following:
>> > 1) adding an image w/ PropertyItems to the assembly as a resource,
>> > loading the resource, getting a property item, changing the property
>> > item values, setting the property item to my Image and saving (using
>> > the various implementations of Image.Save)
>> >
>> > 2) using reflection to get the PropertyItem constructor (yes not the
>> > recommneded way but worth a try).
>> >
>> > 3) just loading an image w/ PropertyItems, getting a property item,
>> > changing the property item values, setting the property item on my
>> > image and saving the image.
>> >
>> > 4) also tried getting the JPEG image encoder and using it
>> >
>> > In all cases the new property item is added but when I save the image
>> > and then enumerator through the PropertyItems my new property is not
>> > there.
>> >
>> > I have tried saving as the original file, a different file name, etc.
>> >
>> >
>> > Here is a very simple snip of what I've tried doing (C#):
>> >
>> > Bitmap bmp = (Bitmap) Bitmap.FromFile(BASE_FILE);
>> >
>> > PropertyItem pi = bmp.GetPropertyItem(0x10f);
>> > pi.Id = 0x8825;
>> > pi.Type = 2;
>> > pi.Value = data;
>> > pi.Len = data.Length;
>> >
>> > bmp.SetPropertyItem(pi);
>> >
>> > PropertyItem propItem = bmp.GetPropertyItem(0x8825);
>> >
>> > bmp.Save(NEW_FILE2);
>> >
>> >
>> > Thanks,
>> > Roger
>> >
>