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NF:winsync.ISynchronousDataRetriever.LoadChangeData |
ISynchronousDataRetriever::LoadChangeData (winsync.h) |
Retrieves item data for a change. (ISynchronousDataRetriever.LoadChangeData) |
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winsync\isynchronousdataretriever_loadchangedata.htm |
winsync |
ae309301-3810-4785-b4f2-a55fbdf819d8 |
12/05/2018 |
ISynchronousDataRetriever interface [Windows Sync],LoadChangeData method, ISynchronousDataRetriever.LoadChangeData, ISynchronousDataRetriever::LoadChangeData, LoadChangeData, LoadChangeData method [Windows Sync], LoadChangeData method [Windows Sync],ISynchronousDataRetriever interface, winsync.isynchronousdataretriever_loadchangedata, winsync/ISynchronousDataRetriever::LoadChangeData |
winsync.h |
Windows |
Windows 7 [desktop apps only] |
Windows Server 2008 R2 [desktop apps only] |
Windows |
19H1 |
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Retrieves item data for a change.
Metadata that describes the change for which data should be retrieved.
Returns the item data for the change specified in pLoadChangeContext.
The possible return codes include, but are not limited to, the values shown in the following table.
| Return code | Description |
|---|---|
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The method succeeded. |
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The source provider determines the data retrieval interface that is implemented by the object that is returned in ppUnkData. The destination provider can acquire this interface by using the QueryInterface method of ppUnkData.
The following example is an implementation of LoadChangeData that finds the specified change in a custom data store and returns a copy of it.
STDMETHODIMP CItemStore::LoadChangeData(
ILoadChangeContext * pLoadChangeContext,
IUnknown ** ppUnkData)
{
HRESULT hr = E_UNEXPECTED;
if (NULL == pLoadChangeContext || NULL == ppUnkData)
{
hr = E_POINTER;
}
else
{
// Find the item in the data store, clone it, and return its IUnknown interface.
ISyncChange* pChange = NULL;
hr = pLoadChangeContext->GetSyncChange(&pChange);
if (SUCCEEDED(hr))
{
SYNC_GID gidItem;
DWORD cbID = sizeof(gidItem);
hr = pChange->GetRootItemId((BYTE*)&gidItem, &cbID);
if (SUCCEEDED(hr))
{
IXMLDOMNode* pNodeItem = NULL;
hr = FindItem(&gidItem, &pNodeItem);
if (SUCCEEDED(hr))
{
IXMLDOMNode* pNodeClone = NULL;
hr = pNodeItem->cloneNode(TRUE, &pNodeClone);
if (SUCCEEDED(hr))
{
hr = pNodeClone->QueryInterface(IID_IUnknown, (void**)ppUnkData);
pNodeClone->Release();
}
pNodeItem->Release();
}
}
pChange->Release();
}
}
return hr;
}