VB.NET XPathNavigator.Evaluate方法代码示例

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本文整理汇总了VB.NET中System.Xml.XPath.XPathNavigator.Evaluate方法的典型用法代码示例。如果您正苦于以下问题：VB.NET XPathNavigator.Evaluate方法的具体用法？VB.NET XPathNavigator.Evaluate怎么用？VB.NET XPathNavigator.Evaluate使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。

在下文中一共展示了XPathNavigator.Evaluate方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。

示例1: XPathDocument

Dim document As XPathDocument = New XPathDocument("books.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

Dim total As Double = CType(navigator.Evaluate("sum(descendant::book/price)"), Double)
Console.WriteLine("Total price for all books: {0}", total.ToString())

开发者ID:VB.NET开发者，项目名称:System.Xml.XPath，代码行数:5，代码来源:XPathNavigator.Evaluate

示例2: XPathDocument

Dim document As XPathDocument = New XPathDocument("books.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

Dim query As XPathExpression = navigator.Compile("sum(descendant::book/price)")

Dim total As Double = CType(navigator.Evaluate(query), Double)
Console.WriteLine("Total price for all books: {0}", total.ToString())

开发者ID:VB.NET开发者，项目名称:System.Xml.XPath，代码行数:7，代码来源:XPathNavigator.Evaluate

示例3: XPathDocument

Dim document As XPathDocument = New XPathDocument("contosoBooks.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

Dim manager As XmlNamespaceManager = New XmlNamespaceManager(navigator.NameTable)
manager.AddNamespace("bk", "http://www.contoso.com/books")

Dim total As Double = CType(navigator.Evaluate("sum(descendant::bk:book/bk:price)", manager), Double)
Console.WriteLine("Total price for all books: {0}", total.ToString())

开发者ID:VB.NET开发者，项目名称:System.Xml.XPath，代码行数:8，代码来源:XPathNavigator.Evaluate

示例4: XPathDocument

Dim document As XPathDocument = New XPathDocument("books.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

Dim nodes As XPathNodeIterator = navigator.Select("//book")
Dim query As XPathExpression = nodes.Current.Compile("sum(descendant::price)")

Dim total As Double = CType(navigator.Evaluate(query, nodes), Double)
Console.WriteLine("Total price for all books: {0}", total.ToString())

开发者ID:VB.NET开发者，项目名称:System.Xml.XPath，代码行数:8，代码来源:XPathNavigator.Evaluate

注：本文中的System.Xml.XPath.XPathNavigator.Evaluate方法示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。