如何获得XElement的价值

Question

I am parsing through an xml doc and I need to get the value of a Property element. As of right now I have a line of code that returns this:

<Property name="ID" value="thevalueineed"/>

Here is my line of code used.

var ID = from el in linkedinfo.DescendantsAndSelf("Property") 
         where (string)el.Attribute("name") == "ID" 
         select el.Attributes("value").ToString();

What would be the next step I am missing that would I get thevalueineed from that Element that I have in var ID ?

Answer 1

Just change your select as

select (string)el.Attribute("value")

A working code.

var xDoc = XDocument.Parse(@"<root><Property name=""ID"" value=""thevalueineed""/></root>");

var ID = from el in xDoc.Root.DescendantsAndSelf("Property")
            where (string)el.Attribute("name") == "ID"
            select (string)el.Attribute("value");

var val = ID.First();

Answer 2

This should work

var ID = from el in linkedinfo.Descendants("Property") 
         where el.Attribute("name").Value == "ID" 
         select el.Attribute("value").Value;

Answer 3

I would personally use .Value instead of casting to string:

XElement linkedTeethInfo = XElement.Parse(@"<Property name=""ID"" value=""thevalueineed""/>");

var ID = from el in linkedTeethInfo.DescendantsAndSelf("Property") 
    where el.Attribute("name").Value == "ID" 
    select el.Attribute("value").Value;

Console.WriteLine("ID: {0}", ID.First());

Created a small fiddle here: https://dotnetfiddle.net/mrSITM

Answer 4

I personally like this method when reading XML files but I don't know if it will work with your XML file.

// Create a DataSet
DataSet ds = new DataSet();

// Get the data from the XML file
ds.ReadXml("C:\\myXMLFile.xml");

// Get values
foreach (DataRow dr in ds.Tables[0].Rows)
{
    string value = dr["ID"].ToString(); 
}

Answer 5

select el.Attributes("value")

will return an a type

System.Linq.Enumerable.WhereSelectEnumerableIterator<System.Xml.Linq.XElement,System.Collections.Generic.IEnumerable<System.Xml.Linq.XAttribute>>

try this:

var ID = element.DescendantsAndSelf("Property").Where(x => x.Attribute("name").Value == "id").Select(x => x.Attribute("value")).First();