Image::FindNextItem method (gdiplusheaders.h)

The Image::FindNextItem method is used along with the Image::FindFirstItem method to enumerate the metadata items stored in this Image object. The Image::FindNextItem method retrieves the description and the data size of the next metadata item in this Image object.

Syntax

Status FindNextItem(
  [in, out] ImageItemData *item
);

Parameters

[in, out] item

Type: ImageItemData*

Pointer to an ImageItemData object. On input, the Desc member points to a buffer (allocated by the caller) large enough to hold the metadata description (1 byte for JPEG, 4 bytes for PNG, 11 bytes for GIF), and the DescSize member specifies the size (1, 4, or 6) of the buffer pointed to by Desc. On output, the buffer pointed to by Desc receives the metadata description, and the DataSize member receives the size, in bytes, of the metadata itself.

Return value

Type: Status

If the method succeeds, it returns Ok, which is an element of the Status enumeration.

If the method fails, it returns one of the other elements of the Status enumeration.

Remarks

Image::FindFirstItem and Image::FindNextItem do not enumerate the metadata items stored by the Image::SetPropertyItem method.

Examples

The following example displays the description and data size for each metadata item in an Image object.

Status stat;        
Image image(L"River5.png");

CHAR descBuf[5] = {0, 0, 0, 0, 0};
ImageItemData itemData;
ZeroMemory(&itemData, sizeof(itemData));
itemData.Size = sizeof(itemData);
itemData.DescSize = 4;
itemData.Desc = descBuf;

stat = image.FindFirstItem(&itemData);

while(Ok == stat)
{
   printf("%s   %d\n", itemData.Desc, itemData.DataSize);
   stat = image.FindNextItem(&itemData);
}

Requirements

See also

Image

Image::GetItemData