/// <summary>method add child element to this element from source element or empty child element, if source child element is not found
/// </summary>
/// <param name="e">XElement instance</param>
/// <param name="srcParentElement">source element with child element, which value is used for new element</param>
/// <param name="srcChildElementName">child element name, which value is used for new element</param>
/// <param name="destChildElementName">name of new element, default is source child element name</param>
/// <returns>added child element</returns>
public static XElement AddChildElement(this XElement e, XElement srcParentElement, string srcChildElementName, string destChildElementName = "")
{
string name = (destChildElementName == "" ? srcChildElementName : destChildElementName);
XElement srcElement = srcParentElement.Element(srcChildElementName);
if(srcElement != null)
return e.AddChildElement(name, srcElement.Value);
else
return e.AddChildElement(name);
}
/// <summary>method add child element to XML data class
/// </summary>
/// <param name="e">XElement instance</param>
/// <param name="xmlDataDocument">source XML element</param>
/// <param name="rootName">name of source XML parent collection element</param>
/// <param name="itemName">name of source XML collection item element</param>
/// <param name="srcItemChildName">name of source XML collection item's child element</param>
/// <param name="destItemChildName">name of added XML element</param>
/// <param name="whereItemChildName">optional name of source XML collection item's child element used for filtration</param>
/// <param name="whereItemChildValue">optional value of source XML collection item's child element used for filtration</param>
public static XElement AddChildElement(this XElement e, XElement xmlDataDocument, string rootName, string itemName, string srcItemChildName, string destItemChildName, string[] whereItemChildNames = null, string[] whereItemChildValues = null)
{
XElement childElement;
XElement root = xmlDataDocument.Descendants(rootName).FirstOrDefault();
if (root != null)
{
XElement xElement = null;
if (whereItemChildNames != null)
{
int whereCount = whereItemChildNames.GetLength(0);
if (whereCount > 0)
{
List<XElement> query = root.Elements(itemName).Where((x) => x.Element(whereItemChildNames[0]).Value == whereItemChildValues[0]).ToList();
if (query.Count() > 0 && whereCount > 1)
{
for (int i = 1; i < whereCount; i++)
{
query = query.Where((x) => x.Element(whereItemChildNames[i]).Value == whereItemChildValues[i]).ToList();
if (query.Count() == 0) break;
}
}
if (query.Count > 0)
xElement = query[0];
else
xElement = null;
}
else
xElement = root.Elements(itemName).FirstOrDefault();
}
else
xElement = root.Elements(itemName).FirstOrDefault();
if (xElement != null)
childElement = e.AddChildElement(destItemChildName, xElement.GetStringValue(srcItemChildName));
else
childElement = e.AddChildElement(destItemChildName);
}
else
childElement = e.AddChildElement(destItemChildName);
return childElement;
}
/// <summary>method add child element to this element from source element descendands or empty child element, if source child element is not found
/// </summary>
/// <param name="e">XElement instance</param>
/// <param name="srcParentElement">source element with descendant elements, which value is used for new element</param>
/// <param name="srcChildElementName">descendant element name, which value is used for new element</param>
/// <param name="destChildElementName">name of added element, default is source child element name</param>
/// <returns></returns>
public static XElement AddFirstDescendantElement(this XElement e, XElement srcParentElement, string srcChildElementName, string destChildElementName = "")
{
string name = (destChildElementName == "" ? srcChildElementName : destChildElementName);
XElement srcElement = srcParentElement.Descendants(srcChildElementName).FirstOrDefault() ;
if (srcElement != null)
return e.AddChildElement(name, srcElement.Value);
else
return e.AddChildElement(name);
}
/// <summary>method add HL7 child element to this element if child element value is not empty
/// </summary>
/// <param name="e">XElement instance</param>
/// <param name="сhildElementName">child element name</param>
/// <param name="сhildElementValue">child element value</param>
/// <returns>added child element if child element value is not empty, otherwise null</returns>
public static XElement AddChildHl7Element(this XElement e, string сhildElementName, string сhildElementValue)
{
return (сhildElementValue == string.Empty ? null : e.AddChildElement(сhildElementName, сhildElementValue));
}
