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XMLHelper.cs
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XMLHelper.cs
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// Copyright (C) 2022 Maxim Gumin, The MIT License (MIT)
using System;
using System.Linq;
using System.Xml.Linq;
using System.ComponentModel;
using System.Collections.Generic;
static class XMLHelper
{
public static T Get<T>(this XElement xelem, string attribute)
{
XAttribute a = xelem.Attribute(attribute);
if (a == null) throw new Exception($"xelement {xelem.Name} didn't have attribute {attribute}");
return (T)TypeDescriptor.GetConverter(typeof(T)).ConvertFromInvariantString(a.Value);
}
public static T Get<T>(this XElement xelem, string attribute, T dflt)
{
XAttribute a = xelem.Attribute(attribute);
return a == null ? dflt : (T)TypeDescriptor.GetConverter(typeof(T)).ConvertFromInvariantString(a.Value);
}
public static int LineNumber(this XElement xelem) => ((System.Xml.IXmlLineInfo)xelem).LineNumber;
public static IEnumerable<XElement> Elements(this XElement xelement, params string[] names) => xelement.Elements().Where(e => names.Any(n => n == e.Name));
public static IEnumerable<XElement> MyDescendants(this XElement xelem, params string[] tags)
{
Queue<XElement> q = new();
q.Enqueue(xelem);
while (q.Any())
{
XElement e = q.Dequeue();
if (e != xelem) yield return e;
foreach (XElement x in e.Elements(tags)) q.Enqueue(x);
}
}
}