You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application contains the following XML fragment: <ApplicationMenu> <MenuItem name="File">…

The correct answer is D. /ApplicationMenu/MenuItem[@name='File']/descendant::MenuItem. XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[@name='File']/descendant:: XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[@name='File']//MenuItem"); // 02 == XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[2]/descendant::MenuItem")…

advanced WCF features

Question

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application contains the following XML fragment:

<ApplicationMenu> <MenuItem name="File"> <MenuItem name="New"> <MenuItem name="Project" /> <MenuItem name="Web Site" /> </MenuItem> <MenuItem name="Open"> <MenuItem name="Project" /> <MenuItem name="Web Site" /> </MenuItem> <MenuItem name="Save" /> </MenuItem> <MenuItem name="Edit"> <MenuItem name="Cut" /> <MenuItem name="Copy" /> <MenuItem name="Paste" /> </MenuItem> <MenuItem name="Help"> <MenuItem name="Help" /> <MenuItem name="About" /> </MenuItem> </ApplicationMenu> The application queries the XML fragment by using the XmlDocument class. You need to select all the descendant elements of the MenuItem element that has its name attribute as File. Which XPath expression should you use?

Options

A//*[@name='File'][name()='MenuItem']
B/ApplicationMenu/MenuItem['File']//MenuItem
C/ApplicationMenu/MenuItem/descendant::MenuItem['File']
D/ApplicationMenu/MenuItem[@name='File']/descendant::MenuItem

How the community answered

(26 responses)

A
4% (1)
B
12% (3)
C
8% (2)
D
77% (20)

Explanation

XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[@name='File']/descendant:: XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[@name='File']//MenuItem"); // 02 == XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[2]/descendant::MenuItem"); // 03 XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[last()]/descendant::MenuItem"); // 04 XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem/descendant::MenuItem[/ApplicationMenu/ MenuItem/@name=@name]"); // 05 XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem/"); // 06 XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem/descendant::[@Description]"); //07 XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[MenuItem][position()=2]"); // 08 == 09 XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[MenuItem and position()=2]"); // 09 == 08 XmlNodeList nodes = doc.SelectNodes("/ApplicationMenu/MenuItem[SubMenu or position()=2]"); // 10

Topics

#XPath#descendant axis#attribute predicate#XML navigation

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