What is a xname xname? (With Code Example)
What is a xname
naming Elements Without x:Name The casing syntax can be utilized to name
components, yet a few classes characterize their Name property that can be
treated as the component's name. So, what is a xname you can name the
preceding the OK button as follows, without the x: prefix:
<Button Name
*okButton">X</Buttons

What is a xname?
What is a xname
You can use either segment, be that as it may, you can't use both
simultaneously. Actually. XAML's idea of names (with x: Name) and the Ul
system's idea of names (with Name) are autonomous, however by and by, it is
entirely expected to treat them conversely.

Supporting
Compiled XAML with Any .NET Language
In the event that
you need to use XAML assemblage with a subjective .NET language, there are two
fundamental prerequisites for empowering this: having a relating CodeDom
supplier and having an MSBuild target document. In addition, language support
for halfway classes is useful yet not carefully required.
A brief design about design
A portion of the
design decisions made here merit a touch of conversation the first is the decision to make XName instances legitimately from strings (through the
overloaded conversion operator) rather than the regular method of overloading the
Element constructors and techniques to take either a string or a NaNante.
xname xname lname
It makes it
simpler to characterize the techniques accurately and yields a bit of economy,
however it's harder to see how everything functions. It very well maybe a bit
befuddling when IntelliSense shows you a technique that takes a name and you
can't make sense of how to make one. The subsequent choice was to have the
option to make XNamespace instances straightforwardly from strings.
Namespaces are
rarely created, and they aren’t done inline in the XML creation code, so there
is little benefit of not doing this with a simple constructor the final
decision is to create an XName from a Namespace and a string, using the
addition operator. This allows the developer to write the following:
var element
new XElement(namespace + “books”); which is a little shorter than the
alternative but arguably not quite as clear. var element new
XElement(namespace. GetName(“books”)); In sum, I think the overall design is
just a little bit too dever and would prefer that it was a bit more
conventional even at a slight cost to readability. You’ll see examples of using
some of these axis methods over the chapter. However, here is a quick example:
Dim doc As New XElement("Inventory",
New XElement("Car", New XAttribute("id", "2000"),
New XElement("PetName", "Jimbo),
New XElement("Color", "Red"),
New XElement("Make", "Ford")))
Delete the PetNane element from the tree.
doc. Descendants("PetName"). Remove()
Console.WriteLine(doc)
End Sub
If you invoke this
method, you’d see the following “pruned” XML tree:
Ford
</Cars
</Inventory
The Oddness of XName (and XNamespace)
If you examine the
signatures of the LINQ to XML. axis methods (or the identically named members
of the container), you’ll notice that they typically require you to specify
what looks to be a Name object. Consider the significance of the Descendants ()
method defined by XContainer:
Public Function
Descendants (ByVal name As Xane) As Tenumerable(OF XElement) Nane is “odd” in
that you will never really directly make use of it in your code. Since this
class has no Public constructor, you cannot make an XName objectError! Can’t make XName objects! doc. Descendants (New XName(“PetName)).Remove()
class has no Public constructor, you cannot make an XName objectError! Can’t make XName objects! doc. Descendants (New XName(“PetName)).Remove()
If you were to
view the formal definition of XName, you will see that this class defines a
custom implicit conversion operator (see Chapter 12 for information on defining
custom conversion operators), which will map a simple System. String to the
correct XName object:
Axis Method Filters
All of the
preceding examples return all elements meeting the criteria of the axis method,
but you have more control than that through overloads that allow you to filter
the results further. For example.
product and the axis element where the element tag name is "name":
var descendant Nameandseif . axes.DescendantsAndSelf ("name");
foreach (var element in descendant NameAndselt)
Console.WriteLine(element);
Notice that the
call to Descendants and Self passes in the string argument, “name”, which is a
string but the parameter type is XName. Like XNamespace, XName has an implicit
string conversion operator. In addition to overloads with no parameters, some
of the axis methods have overloads that will accept
an XName argument, just like Descendants and Self. The XName argument
filters the results to only elements with matching tags. The output is shown
next: Zune.
xname xname xname
xname
It’s important to
recognize that the preceding element does not contain the aris element and that
the tag for the element names. This demonstrates how XName arguments to axis
methods work. The axis method invoked was Descendants and Self, which would
have returned the axis element and all child nodes if called without
parameters.
However, the XName
argument “name” is passed in this example. Since the tag for the axis element
is a product, there isn’t a match and the axis element is filtered out of the
results. The child name element is included, as you can see in the results, but
the list Price element isn’t included in the results because its tag doesn’t
match the filter. Now that you know how to find any element in an XML document,
you need to know how to manipulate the contents of the XML document, which is
covered next.
What is a xname xname? (With Code Example)
Reviewed by Ankit Saini
on
July 15, 2020
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