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在XML处理中,StringReader类可以用来读取XML字符串并将其转换为XML节点或文档对象,以便进行进一步的处理和操作。以下是StringReader类在XML处理中的一些常见应用:
- 将XML字符串加载到XmlDocument对象中:
string xmlString = "<root><child>value</child></root>"; XmlDocument doc = new XmlDocument(); using (StringReader stringReader = new StringReader(xmlString)) { using (XmlReader xmlReader = XmlReader.Create(stringReader)) { doc.Load(xmlReader); } }
- 遍历XML节点并获取节点的属性和值:
string xmlString = "<root><child attribute='value'>content</child></root>"; using (StringReader stringReader = new StringReader(xmlString)) { using (XmlReader xmlReader = XmlReader.Create(stringReader)) { while (xmlReader.Read()) { if (xmlReader.NodeType == XmlNodeType.Element) { if (xmlReader.HasAttributes) { string attributeValue = xmlReader.GetAttribute("attribute"); Console.WriteLine(attributeValue); } } else if (xmlReader.NodeType == XmlNodeType.Text) { string nodeValue = xmlReader.Value; Console.WriteLine(nodeValue); } } } }
- 使用XPath表达式查询XML节点:
string xmlString = "<root><child attribute='value'>content</child></root>"; using (StringReader stringReader = new StringReader(xmlString)) { using (XmlReader xmlReader = XmlReader.Create(stringReader)) { XPathDocument xpathDoc = new XPathDocument(xmlReader); XPathNavigator navigator = xpathDoc.CreateNavigator(); XPathNodeIterator iterator = navigator.Select("//child"); while (iterator.MoveNext()) { string nodeValue = iterator.Current.Value; Console.WriteLine(nodeValue); } } }
总的来说,StringReader类在XML处理中可以帮助我们方便地将XML字符串转换为XML节点或文档对象,并进行各种操作和查询。