我正在尝试使用 XMLLITE 读取器和写入器更新 XML 文档节点属性,但我做不到。当我尝试添加新属性时,作者正在添加。
我的问题是是否可以使用 XMLLITE 更新现有的 XML 节点属性值?
<parent>
<child Name="AAA">Yes
</child>
</parent>
我想更新上面的 XML Node Attribute of Name
<parent>
<child Name="BBB">Yes
</child>
</parent>
XMLLIte c++ 代码
//if the element is price, then discount price by 25%
if (wcscmp(pQName, L"child") == 0)
{
inPrice = TRUE;
/*if (FAILED(hr = pWriter->WriteAttributeString(NULL, L"test", NULL, L"TEST")))
{
wprintf(L"Error writing WriteAttributeString, error is %08.8lx", hr);
return -1;
}*/
/*if (FAILED(hr = pWriter->WriteNodeShallow(pReader, FALSE)))
{
wprintf(L"Error writing WriteNodeShallow, error is %08.8lx", hr);
return -1;
}*/
//if (FAILED(hr = pReader->MoveToAttributeByName(L"Name", NULL)))
if (FAILED(hr = pReader->MoveToFirstAttribute()))
{
wprintf(L"Error Moving to Attribute, error is %08.8lx", hr);
}
LPCWSTR AttributeValue = NULL ;
if (FAILED(hr = pReader->GetValue(&AttributeValue, NULL)))
{
wprintf(L"Error Moving to Attribute, error is %08.8lx", hr);
}
if (FAILED(hr = pWriter->WriteNodeShallow(pReader, FALSE)))
{
wprintf(L"Error writing WriteNodeShallow, error is %08.8lx", hr);
return -1;
}
inPrice = TRUE;
if (FAILED(hr = pWriter->WriteAttributeString(NULL, L"Name", NULL, L"BBB")))
{
wprintf(L"Error writing WriteAttributeString, error is %08.8lx", hr);
return -1;
}
}
else
{
inPrice = FALSE;
if (FAILED(hr = pWriter->WriteNodeShallow(pReader, FALSE)))
{
wprintf(L"Error writing WriteNodeShallow, error is %08.8lx", hr);
return -1;
}
}
正如您所提到的,我尝试这样做,我尝试设置属性的值,但它没有设置现有属性的值,但是如果我尝试添加新属性,那么它会添加属性。
当我尝试循环遍历节点列表时,节点类型永远不会出现 XmlNodeType_Attribute: I 'M NOT SURE WHY?
请给我你的建议,
谢谢卡提克