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LoadItem Method (ImageViewerVirtualizer)
Summary
Load the image data for an item.
Syntax
protected abstract object LoadItem(ImageViewerItem item)
Protected MustOverride Function LoadItem(ByVal item As ImageViewerItem) As Object
protected:virtual Object^ LoadItem(ImageViewerItem^ item) abstract
Parameters
item
Source item
Return Value
The image object for this item.
Remarks
This method is called when an item comes into view and is not cached in memory.
Implementers must load the image data from the external source and return it here. This can be one of the following:
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RasterImage object. Will used as if it was set in ImageViewerItem.Image.
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SvgDocument object. Will used as if it was set in ImageViewerItem.SvgDocument.
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null, there is no image data for this object.
You should encapsulate the code inside this method with a try/catch and handle the error correctly. This method will not automatically fire the ItemError event.
Example
For an example, refer to ImageViewerVirtualizer.
Requirements
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