120 lines
3.4 KiB
C#
120 lines
3.4 KiB
C#
//
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// System.Web.UI.XPathBinder
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//
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// Authors:
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// Ben Maurer (bmaurer@users.sourceforge.net)
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//
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// (C) 2003 Ben Maurer
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections;
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using System.Collections.Specialized;
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using System.Text;
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using System.Xml.XPath;
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using System.Xml;
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namespace System.Web.UI
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{
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public sealed class XPathBinder
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{
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XPathBinder ()
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{
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}
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public static object Eval (object container, string xPath)
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{
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return Eval (container, xPath, (IXmlNamespaceResolver)null);
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}
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public static object Eval (object container, string xPath, IXmlNamespaceResolver resolver)
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{
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if (xPath == null || xPath.Length == 0)
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throw new ArgumentNullException ("xPath");
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IXPathNavigable factory = container as IXPathNavigable;
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if (factory == null)
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throw new ArgumentException ("container");
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object result = factory.CreateNavigator ().Evaluate (xPath, resolver);
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XPathNodeIterator itr = result as XPathNodeIterator;
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if (itr != null) {
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if (itr.MoveNext ())
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return itr.Current.Value;
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else
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return null;
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}
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return result;
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}
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public static string Eval (object container, string xPath, string format)
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{
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return Eval (container, xPath, format, null);
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}
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public static string Eval (object container, string xPath, string format, IXmlNamespaceResolver resolver)
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{
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object result = Eval (container, xPath, resolver);
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if (result == null)
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return String.Empty;
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if (format == null || format.Length == 0)
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return result.ToString ();
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return String.Format (format, result);
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}
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public static IEnumerable Select (object container, string xPath)
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{
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return Select (container, xPath, null);
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}
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public static IEnumerable Select (object container, string xPath, IXmlNamespaceResolver resolver)
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{
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if (xPath == null || xPath.Length == 0)
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throw new ArgumentNullException ("xPath");
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IXPathNavigable factory = container as IXPathNavigable;
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if (factory == null)
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throw new ArgumentException ("container");
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XPathNodeIterator itr = factory.CreateNavigator ().Select (xPath, resolver);
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ArrayList ret = new ArrayList ();
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while (itr.MoveNext ()) {
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IHasXmlNode nodeAccessor = itr.Current as IHasXmlNode;
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if (nodeAccessor == null)
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throw new InvalidOperationException ();
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ret.Add (nodeAccessor.GetNode ());
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}
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return ret;
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}
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}
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}
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