从属性指定的XML读取

Question

I have the following XML file:

<Categories>
<Category name="TopDown">
    <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
    <Path>http://localhost:8080/images/TopDown/Blu-Ray.png</Path>
    <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
    <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
    <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
    <Path>http://localhost:8080/images/TopDown/Divx.png</Path>  
</Category>
<Category name="SideScroll">
    <Path>http://localhost:8080/images/SideScroll/MediaMonkey.png</Path>
    <Path>http://localhost:8080/images/SideScroll/Miro.png</Path>
    <Path>http://localhost:8080/images/SideScroll/QuickTime.png</Path>
    <Path>http://localhost:8080/images/SideScroll/VLC.png</Path>
    <Path>http://localhost:8080/images/SideScroll/WinAmp.png</Path>
</Category>

In my c# code, I have a function that gets a string that represents the Category "name" attribute, and if that string equals to that attribute I'd like to get all the text between the "Path" tags. For Instance, if the function gets a string parameter that equals "TopDown" the output would be :

http://localhost:8080/images/TopDown/Divx.png
    http://localhost:8080/images/TopDown/Blu-Ray.png
    http://localhost:8080/images/TopDown/Divx.png
    http://localhost:8080/images/TopDown/Divx.png
    http://localhost:8080/images/TopDown/Divx.png
    http://localhost:8080/images/TopDown/Divx.png

Thank you.

Answer 1

You can do this with LINQ To XML:

var xdoc = @"<Categories>
    <Category name='TopDown'>
        <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
        <Path>http://localhost:8080/images/TopDown/Blu-Ray.png</Path>
        <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
        <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
        <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
        <Path>http://localhost:8080/images/TopDown/Divx.png</Path>
    </Category>
    <Category name='SideScroll'>
        <Path>http://localhost:8080/images/SideScroll/MediaMonkey.png</Path>
        <Path>http://localhost:8080/images/SideScroll/Miro.png</Path>
        <Path>http://localhost:8080/images/SideScroll/QuickTime.png</Path>
        <Path>http://localhost:8080/images/SideScroll/VLC.png</Path>
        <Path>http://localhost:8080/images/SideScroll/WinAmp.png</Path>
    </Category>
</Categories>";

var paths = XDocument.Parse(xdoc).Descendants("Category")
        .Where(w => (string)w.Attribute("name") == "TopDown")
        .Select(s => s.Elements("Path").Select (x => (string)x)).ToList();


foreach (var x in paths)
    Console.WriteLine(x);

You can copy paste that into linqpad or visual studio and it'll run.