GdPicture image identifier.
Example





In This Topic
GdPicture14 Namespace / GdPictureImaging Class / HasAttachedThumbnail Method

HasAttachedThumbnail Method (GdPictureImaging)

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Some images embed a thumbnail bitmap for previewing purpose. This method helps to determine if a specific GdPicture image has one.
Syntax
'Declaration
 

Public Function HasAttachedThumbnail( _
   ByVal ImageID As Integer _
) As Boolean
public bool HasAttachedThumbnail( 
   int ImageID
)
public function HasAttachedThumbnail( 
    ImageID: Integer
): Boolean; 
public function HasAttachedThumbnail( 
   ImageID : int
) : boolean;
public: bool HasAttachedThumbnail( 
   int ImageID
) 
public:
bool HasAttachedThumbnail( 
   int ImageID
)

Parameters

ImageID
GdPicture image identifier.

Return Value

True if a thumbnail bitmap is attached to the image, False otherwise.
Remarks
Use the GetStat() method to check if this method has completed successfully.

This method requires the Image Documents component to run.

Example
Removing the existing thumbnail and creating and attaching a new one to a GdPicture image. 
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg");
 
    int thumbnailID = 0;
    if (gdpictureImaging.HasAttachedThumbnail(imageID))
    {
        // Get the already attached thumbnail and save it as an image, then detach it.
        thumbnailID = gdpictureImaging.GetAttachedThumbnail(imageID);
        gdpictureImaging.SaveAsJPEG(thumbnailID, "thumbnail.jpg", 75);
        gdpictureImaging.DetachThumbnail(imageID);
        gdpictureImaging.ReleaseGdPictureImage(thumbnailID);
    }
 
    // Create a new thumbnail with a system-defined size and attach it to an image.
    thumbnailID = gdpictureImaging.CreateThumbnail(imageID, 0, 0);
    gdpictureImaging.AttachThumbnail(imageID, thumbnailID);
 
    // Release used resources.
    gdpictureImaging.ReleaseGdPictureImage(thumbnailID);
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}
See Also

Reference

GdPictureImaging Class
GdPictureImaging Members
GetAttachedThumbnail Method