Gets the text value from the element located by the given XPath.
/*
* RegExpress
*
* Copyright (c) 2010, Daniel McGaughran
*
* Licensed under the Apache Licence, Version 2.0 (the "Licence");
* you may not use this file except in compliance with the Licence.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the Licence is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the Licence for the specific language governing permissions and
* limitations under the Licence.
*
*/
using System;
using System.Xml;
namespace RegExpressModel.Utility
{
static class XmlUtility
{
/// <summary>
/// Gets the text value from the element located by the given XPath.
/// </summary>
/// <param name="sourceNode">The source element.</param>
/// <param name="xPath">The XPath of the parent element.</param>
/// <returns>The (first) string value if found. If the source element or XPath is invalid, null will
/// be returned.</returns>
internal static string GetTextValue(this XmlNode sourceNode, string xPath)
{
if (sourceNode == null || String.IsNullOrEmpty(xPath))
return null;
XmlNode targetParent = sourceNode.SelectSingleNode(xPath);
string value = "";
if (targetParent != null)
{
XmlNodeList children = targetParent.ChildNodes;
foreach(XmlNode childNode in children)
{
if (childNode is XmlText || childNode is XmlCDataSection)
{
value = childNode.Value;
break;
}
}
}
return value;
}
}
}
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