Question

I’d like to ask about how to replace element in xml for experts.

The xml is like this,

Source:

<root>
    <elements>
        <element src="aaaa" />
        <element src="a" />
        <element src="aaa" />
    </elements>
</root>

What I’d like to do is :

1. Find src element’s value.
2. Convert src’s value to character number by using Convert(string value) method.

ex. aaaa => 4, a => 1, aaa => 3

1. Replace src’s value.

Result:

<root>
    <elements>
        <element src="4" />
        <element src="1" />
        <element src="3" />
    </elements>
</root> 

Answer 1

Is this what you’re after?

var source = "<root><elements><element src=\"aaaa\"/><element src=\"a\"/>" +
             "<element src=\"aaa\"/></elements></root>";

var doc = XElement.Parse(source);

foreach (var element in doc.Descendants("element"))
{
    element.Attribute("src").Value = element.Attribute("src").Value.Length.ToString();
}

Results in:

<root>
  <elements>
    <element src="4" />
    <element src="1" />
    <element src="3" />
  </elements>
</root>