/// <summary>
/// Updates the specified XML element with a value for the specified
/// XML file.
/// </summary>
/// <param name="path">The path to the file.</param>
/// <param name="element">The name of the XML element.</param>
/// <param name="value">The value to update for the XML element.</param>
/// <param name="ns">An optional namespace for the XML element. (Set null to ignore)</param>
/// <returns>A value indicating if the XML element was updated.</returns>
public bool UpdateElement(string path, string element, string value, XNamespace ns)
{
try
{
if (String.IsNullOrEmpty(path) || String.IsNullOrEmpty(element) || String.IsNullOrEmpty(value))
{
return(false);
}
if (!IoFileUtils.FileExists(path))
{
return(false);
}
if (IoFileUtils.IsFileReadOnly(path))
{
if (!IoFileUtils.RemoveReadOnlyAttribute(path))
{
return(false);
}
}
var contents = IoFileUtils.ReadFileAsString(path);
if (String.IsNullOrEmpty(contents) || String.IsNullOrWhiteSpace(contents))
{
return(false);
}
var xDoc = XDocument.Parse(contents);
if (xDoc.Root == null)
{
return(false);
}
var el = ns != null
? xDoc.Root.Element(ns + element)
: xDoc.Root.Element(element);
//try ignore namespage
if (ns != null && el == null)
{
el = xDoc.Root.Element(element);
}
if (el == null)
{
return(false);
}
el.Value = value;
return(IoFileUtils.DeleteFile(path) && IoFileUtils.CreateFile(path, xDoc.ToString()));
}
catch (Exception e)
{
Debug.WriteLine(e);
return(false);
}
}
/// <summary>
/// Gets the value of the specified XML element from the specified XML
/// file.
/// </summary>
/// <param name="path">The path to the file.</param>
/// <param name="element">The name of the XML element.</param>
/// <param name="ns">An optional namespace for the XML element. (Set null to ignore)</param>
/// <returns>The value of the specified XML element.</returns>
public string GetElement(string path, string element, XNamespace ns)
{
try
{
var contents = IoFileUtils.ReadFileAsString(path);
if (String.IsNullOrEmpty(contents) || String.IsNullOrWhiteSpace(contents))
{
return(null);
}
var xDoc = XDocument.Parse(contents);
if (xDoc.Root == null)
{
return(null);
}
var el = ns != null
? xDoc.Root.Element(ns + element)
: xDoc.Root.Element(element);
//try ignore namespace
if (el == null && ns != null)
{
el = xDoc.Root.Element(element);
}
return(el != null
? String.IsNullOrEmpty(el.Value)
? null
: el.Value
: null);
}
catch (Exception e)
{
Debug.WriteLine(e);
return(null);
}
}
