C# xml to linq query

Question

I'm still struggling with the XML to Linq syntax.

I have a XML-structure where I'm trying to query the different prices of a product.

This is the XML:

  <product>
    <description>productname</description>
    <properties>
      <property>
        <key>RetailPrice</key>
        <value>100.00 $</value>
      </property>
      <property>
        <key>StockPrice</key>
        <value>80.00 $</value>
      </property>
    </properties>
  </product>

There is a big amount of <product> in the XML-file so I'm trying to query the price of a specific productname.

Does anybody know how to do this?

Answer 1

You can use the XElement class. Look at the related post: How to use a LINQ query to get XElement values when XElements have same name .

Do something like:

string[] prices = xml.Elements("product")
.Where(x => x.Element("description").Value == productName)
.Element("properties")
.Elements("property")
.Where(x => x.Element("key").Value == "RetailPrice")
.Select(x => x.Element("value").Value)
.ToArray();

You could do additional null checking with C# 6 null-propagation operator.

string[] prices = xml.Elements("product")
.Where(x => x.Element("description")?.Value == productName)
.Element("properties")
.Elements("property")
.Where(x => x.Element("key")?.Value == "RetailPrice")
.Select(x => x.Element("value").Value)
.ToArray();