如何修改xml内部属性

时间:2013-06-24 09:38:46

标签: c# xml

我正在尝试编辑xml文件。

XmlDocument myXmlDocument = new XmlDocument();
myXmlDocument.Load(@"C:\\Users\\Vahid\\Desktop\\HG\\HG\\HG\\singleM.kml");
XmlNode myNode = myXmlDocument.SelectSingleNode(
    "/kml/Document/Placemark/Point/coordinates");
myNode.Value = coordinates;
myXmlDocument.Save(@"C:\\Users\\Vahid\\Desktop\\HG\\HG\\HG\\singleM.kml");

这是我的xml(.kml)文件:

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2"
    xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
<Document>
    <name>change.kml</name>
    <Style id="sn_ylw-pushpin"></Style>
    <Placemark>
    <Point>
        <coordinates>0, 0,0</coordinates>
    </Point>
    <name>12</name>
</Placemark>
</Document>
</kml>

1 个答案:

答案 0 :(得分:0)

Xml名称空间:

XmlNamespaceManager ns = new XmlNamespaceManager(myXmlDocument.NameTable);
ns.AddNamespace("kml", "http://www.opengis.net/kml/2.2");
XmlNode myNode = myXmlDocument.SelectSingleNode("/kml:kml/kml:Document/kml:Placemark/kml:Point/kml:coordinates", ns);
myNode.InnerText = coordinates;

请注意,此处"kml" / "kml:"没有什么特别之处 - 它也可以是:

XmlNamespaceManager ns = new XmlNamespaceManager(myXmlDocument.NameTable);
ns.AddNamespace("x", "http://www.opengis.net/kml/2.2");
XmlNode myNode = myXmlDocument.SelectSingleNode("/x:kml/x:Document/x:Placemark/x:Point/x:coordinates", ns);
myNode.InnerText = coordinates;

重要的是,每个元素都在命名空间http://www.opengis.net/kml/2.2中; AddNamespace只是添加别名,以便我们可以方便地讨论命名空间 - 然后我们使用别名编写xpath,并将namespace-manager传递给{{ 1}}方法。