/// <summary>
/// Gets the element or attribute value of the specified element.
/// </summary>
/// <param name="currentNode">The current </param>
/// <param name="query">The xpath query.</param>
/// <param name="throwException">if set to <c>true</c> throw exception.</param>
public static string GetValue(XNode currentNode, string query, bool throwException)
{
var node = XObjectUtility.GetXObject(currentNode, query);
if (node == null)
{
if (throwException)
{
throw new ArgumentException("The XPath query returns a null node", "query");
}
else
{
return(null);
}
}
if (node.NodeType == System.Xml.XmlNodeType.Element)
{
return((node as XElement).Value);
}
else if (node.NodeType == System.Xml.XmlNodeType.Attribute)
{
return((string)XObjectUtility.GetXAttributeValue(currentNode, query, throwException));
}
else
{
return(null);
}
}
/// <summary>
/// Returns an object for parsing
/// and adding to a list of parameters for data access.
/// </summary>
/// <param name="set">The <see cref="System.Xml.Linq.XNode"/></param>
/// <param name="setQuery">The XPath <see cref="System.String"/>.</param>
/// <param name="throwException">When <code>true</code>, throw an exception for null nodes and nodes that do not parse into the specified type.</param>
/// <param name="defaultValue">Return a boxing <see cref="System.Object"/> for “zero-length” text nodes.</param>
/// <typeparam name="T">The type to parse from the node value.</typeparam>
public static object GetXAttributeValueAndParse <T>(XNode set, string setQuery, bool throwException, T defaultValue)
{
return(XObjectUtility.GetXAttributeValueAndParse <T>(set, setQuery, throwException, defaultValue, null));
}
/// <summary>
/// Returns an object for parsing
/// and adding to a list of parameters for data access.
/// </summary>
/// <param name="set">The <see cref="System.Xml.Linq.XNode"/></param>
/// <param name="setQuery">The <see cref="System.String"/></param>
/// <param name="throwException">When <code>true</code>, throw an exception for null nodes.</param>
/// <param name="defaultValue">Return the specified default value for “zero-length” text nodes</param>
public static string GetXAttributeValue(XNode set, string setQuery, bool throwException, string defaultValue)
{
return(XObjectUtility.GetXAttributeValue(set, setQuery, throwException, defaultValue, null));
}
/// <summary>
/// Gets the <see cref="System.Xml.Linq.XDeclaration"/>.
/// </summary>
public static XDeclaration GetXDeclaration()
{
return(XObjectUtility.GetXDeclaration(XEncoding.Utf08, true));
}
/// <summary>
/// Gets the elements.
/// </summary>
/// <param name="currentElement">The current element.</param>
/// <param name="query">The xpath query.</param>
public static IEnumerable <XElement> GetXElements(XNode currentElement, string query)
{
var nodes = XObjectUtility.GetXNodes(currentElement, query);
return(nodes.OfType <XElement>());
}