How can I access a single XML element's value using C#.net web-pages with WebMatrix?

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@using System.Xml.Linq

XDocument doc = XDocument.Load(Server.MapPath("~/User_Saves/cradebaugh/testFile.xml"));

foreach (XElement element in doc.Element("root").Element("requisitionData").Descendants())
{
    string value = element.Value;
}

or with XPath:

@using System.Xml.Linq
@using System.Xml.XPath

XDocument doc = XDocument.Load(Server.MapPath("~/User_Saves/cradebaugh/testFile.xml"));

foreach (XElement element in doc.XPathSelectElement("//requisitionData").Descendants())
{
    string value = element.Value;
}

UPDATE:

And if you wanted to select for example the second <element1> node from your updated example:

string value = doc.XPathSelectElement("//requisitionData[2]/element1").Value;
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VoidKing
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VoidKing

I am currently an IT specialist for a municipal organization in the state of Oklahoma, and while I perform all sorts of IT specific tasks, my projects almost always include programming/web development. Since I started (a newb fresh out of college) I have learned a massive amount about programming best practices and functionality. I very much have Stack Overflow to thank for a lot of this. I have come to be an avid believer of Stack Exchange and their original goals (goals I think they are accomplishing very well, I might add). As a programmer, who constantly has to try new things, Stack Overflow has proven an invaluable resource for me. I try, research, try again, delve into old school books, and try again, but when push comes to shove, there are many times when my current level of experience in whatever language, proves inadequate and leaves me scratching my head, so to speak. It seems, that when I am in my darkest hour of coding, Stack Overflow (i.e., the community therein) not only gets me through the problem, but also teaches me how I can handle similar situations in the future, thus always making me a better programmer all around. :) I enjoy programming more than any other IT related task. Guess that's just who I am, but I suppose I am preaching to the choir here.

Updated on April 11, 2020

Comments

  • VoidKing
    VoidKing about 4 years

    I've looked at a lot of resources, done a lot of research, and tried many "best-guesses" to access a single element at a time using WebMatrix with C#, web-pages, however nothing I am trying is getting through.

    Consider a simple xml document that looks like this:

    <root>
        <requisitionData>
            <element1>I am element 1</element1>
            <element2>I am element 2</element2>
        </requisitionData>
    </root>
    

    I know I can use a foreach loop, like so:

    @using System.Xml.Linq
    
    XDocument doc = XDocument.Load(Server.MapPath("~/User_Saves/cradebaugh/testFile.xml"));
    
    foreach (XElement element in doc.Descendants("requisitionData"))
    {
        @element.Value
    }
    

    And that, of course, works fine. But what if I simply wanted to store the single element, <element1>'s value in a string variable?

    I've looked here (link below), but I can't make heads or tails of this code (it barely even looks like C# to me, but then again, I'm so new to parsing XML...):

    http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/b14ce4d1-77f1-420d-ad91-0989794a1d45/

    I've also checked here: How to Get XML Node from XDocument

    But the code shown makes no sense to me here either. I keep thinking there must be a simpler way to do this, hopefully without learning a whole new querying approach.

    ---------------------------------THINGS I'VE TRIED---------------------------------

    XDocument doc = XDocument.Load(Server.MapPath("~/User_Saves/cradebaugh/testFile.xml"));
    
    string element = doc.Descendants("requisitionData").Descendants("element1").Value;
    

    Error I receive: "missing using directive or assembly reference

    XDocument doc = XDocument.Load(Server.MapPath("~/User_Saves/cradebaugh/testFile.xml"));
    
    XElement element = doc.Descendants("element1");
    string val = element.Value;
    

    Error I receive: Cannot implicitly convert type 'System.Collections.Generic.IEnumerable' to 'System.Xml.Linq.XElement'. An explicit conversion exists (are you missing a cast?)

    I have, indeed, tried other things, but I get pretty much the same errors as shown above. Am I making this harder than it is, or am I oversimplifying it?

    -------------------------UPDATE------------------------------

    I was able to get this to work:

    string element = doc.Element("root").Element("requisitionData").Element("element1").Value;
    
    @element
    

    However, one thing that concerns me about this approach is that .Element selects the 'first' match, so in an xml document that looks like this:

    <root>
        <requisitionData>
            <element1>I am element 1</element1>
            <element2>I am element 2</element2>
        </requisitionData>
        <requisitionData>
            <element1>I am element 1</element1>
            <element2>I am element 2</element2>
        </requisitionData>
    </root>
    

    How could I access the second occurrence of <element1>?