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what does Descendants keyword does in LINQ ?

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User264732274 posted

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();

Sunday, July 19, 2015 8:29 AM

Answers

User61956409 posted

Hi 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

Marked as answer by Anonymous Thursday, October 7, 2021 12:00 AM

Monday, July 20, 2015 4:00 AM

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what does Descendants keyword does in LINQ ?

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