[英]Adding subtree to boost::property_tree element
我想要的是:
<tree>
<objects>
<object id="12345678">
<AdditionalInfo>
<Owner>Mr. Heik</Owner>
<Health>37/100</Health>
</AdditionalInfo>
</object>
</objects>
</tree>
我得到的是:
<tree>
<objects>
<object id="12345678"/>
<AdditionalInfo>
<Owner>Mr. Heik</Owner>
<Health>37/100</Health>
</AdditionalInfo>
</objects>
</tree>
我試過的是:
using boost::property_tree::ptree;
ptree pt;
boost::property_tree::ptree nodeObject;
nodeObject.put("object.<xmlattr>.id", 12345678);
boost::property_tree::ptree nodeInfo;
nodeInfo.put("Owner", "Mr. Heik");
nodeInfo.put("Health", "37/100");
// Put everything together
nodeObject.put_child("AdditionalInfo", nodeInfo);
pt.add_child("tree.objects", nodeObject);
write_xml("output.xml", pt);
我試圖通過使用put / add / add_child / etc獲得所需的結果。 但沒有成功。 我必須使用哪些增強功能?
這行:
nodeObject.put("object.<xmlattr>.id", 12345678);
正在使用給定屬性將新的子項添加到當前節點的子路徑“對象”中。
只需在節點上設置屬性:
nodeObject.put("<xmlattr>.id", 12345678);
並將節點直接添加到樹中的正確路徑:
pt.add_child("tree.objects.object", nodeObject);
最終代碼:
ptree pt;
boost::property_tree::ptree nodeObject;
nodeObject.put("<xmlattr>.id", 12345678);
boost::property_tree::ptree nodeInfo;
nodeInfo.put("Owner", "Mr. Heik");
nodeInfo.put("Health", "37/100");
nodeObject.put_child("AdditionalInfo", nodeInfo);
pt.add_child("tree.objects.object", nodeObject);
write_xml("output.xml", pt);
輸出:
<?xml version="1.0" encoding="utf-8"?>
<tree>
<objects>
<object id="12345678">
<AdditionalInfo>
<Owner>Mr. Heik</Owner>
<Health>37/100</Health>
</AdditionalInfo>
</object>
</objects>
</tree>
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