what does Descendants keyword does in LINQ ?[Answered] RSS

• • Reply
  sudip_inn

  Contributor

  2231 Points

  3706 Posts

  what does Descendants keyword does in LINQ ?

  Jul 19, 2015 08:29 AM|sudip_inn|LINK

  <div>

  what Descendants keyword does ?

  can we omit this ? please write in details with example to understand the usage of Descendants keyword. thanks

  var items = xmldoc.Descendants("whatevernodename")
             .Select(node => node.Value.ToString())
             .Skip(PageTimes100)
             .Take(100)
             .ToList();

  </div>
• • Reply
  Fei Han - MS...

  All-Star

  40565 Points

  6233 Posts

  Microsoft

  Re: what does Descendants keyword does in LINQ ?

  Jul 20, 2015 04:00 AM|Fei Han - MSFT|LINK

  Hi sudip_inn,

  sudip_inn

  what Descendants keyword does ?

  XDocument.Descendants method could returns a collection of the descendant elements for this document or element, in document order. It has two overloads Descendants() and Descendants(XName). For more information, please refer to this link.

  https://msdn.microsoft.com/en-us/library/system.xml.linq.xdocument.descendants(v=vs.110).aspx

  Besides, this sample is for your reference.

  EmployeesInfo.XML

  <?xml version="1.0" encoding="utf-8" ?>
  <Employees>
    <employee id ="1" name="emp1"  designation="Managing Director" company="comp1">emp1</employee>
    <employee id ="2" name="emp2"  designation="Team Leader (S/W)" company="comp2">emp2</employee>
    <employee id ="3" name="emp3"  designation="Managing Director" company="comp1">emp3</employee>
  </Employees>
  

  Web page

  <div>
      <asp:Button ID="btnfind" runat="server" Text="Find Descendant Elements " OnClick="btnfind_Click" />
      <asp:GridView ID="GridView1" runat="server"></asp:GridView>
  </div>
  

  protected void btnfind_Click(object sender, EventArgs e)
  {
      XDocument xmldoc = XDocument.Load(Server.MapPath("Data/EmployeesInfo.XML"));
      var items = xmldoc.Descendants("employee").Select(node => node.Value.ToString()).ToList();
  
      GridView1.DataSource = items;
      GridView1.DataBind();
  }
  

  

  Best Regards,

  Fei Han

  
  
  

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