using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
namespace Elmax
{
/// <summary>
/// Helper class to use the .NET XmlDocument's XPath methods
/// </summary>
public class Document
{
/// <summary>
/// Non-default constructor
/// </summary>
/// <param name="doc"></param>
public Document(XmlDocument doc)
{
_Doc = doc;
}
/// <summary>
/// Get elements by tag name
/// </summary>
/// <param name="tagName">Is Tag name</param>
/// <returns>List of elements that have the same tag name</returns>
public List<Elmax.Element> GetElementsByTagName(string tagName)
{
if (_Doc == null)
throw new System.InvalidOperationException("Invalid document");
List<Elmax.Element> list = new List<Elmax.Element>();
XmlNodeList nodeList = _Doc.GetElementsByTagName(tagName);
ConvNodeListToList(nodeList, ref list);
return list;
}
/// <summary>
/// Get elements by tag name within certain namespace URI
/// </summary>
/// <param name="tagName">Is Tag name</param>
/// <param name="namespaceURI"></param>
/// <returns>List of elements that have the same tag name</returns>
public List<Elmax.Element> GetElementsByTagName(string tagName, string namespaceURI)
{
if (_Doc == null)
throw new System.InvalidOperationException("Invalid document");
List<Elmax.Element> list = new List<Elmax.Element>();
XmlNodeList nodeList = _Doc.GetElementsByTagName(tagName, namespaceURI);
ConvNodeListToList(nodeList, ref list);
return list;
}
/// <summary>
/// Get element by Id
/// </summary>
/// <param name="id">is Id</param>
/// <returns>Element</returns>
public Elmax.Element GetElementById(string id)
{
if (_Doc == null)
throw new System.InvalidOperationException("Invalid document");
XmlNode node = _Doc.GetElementById(id);
if(node!=null)
return new Element(_Doc, node, "", node.Name, true, false);
return new Element();
}
/// <summary>
/// Select the elements using XPath expression
/// </summary>
/// <param name="xpath">XPath expression</param>
/// <returns>List of elements which satisfy the XPath expression</returns>
public List<Elmax.Element> SelectNodes(string xpath)
{
if (_Doc == null)
throw new System.InvalidOperationException("Invalid document");
List<Elmax.Element> list = new List<Elmax.Element>();
XmlNodeList nodeList = _Doc.SelectNodes(xpath);
ConvNodeListToList(nodeList, ref list);
return list;
}
/// <summary>
/// Select the element using XPath expression
/// </summary>
/// <param name="xpath">XPath expression</param>
/// <returns>Element which satisfies the XPath expression</returns>
public Elmax.Element SelectSingleNode(string xpath)
{
if (_Doc == null)
throw new System.InvalidOperationException("Invalid document");
XmlNode node = _Doc.SelectSingleNode(xpath);
if (node != null)
{
return new Element(_Doc, node, "", node.Name, true, false);
}
return new Element();
}
/// <summary>
/// Convert a list of nodes to a list of Elmax elements
/// </summary>
/// <param name="pList"></param>
/// <param name="list"></param>
private void ConvNodeListToList(XmlNodeList pList, ref List<Elmax.Element> list)
{
if(pList==null)
return;
for(int i=0; i<pList.Count; ++i)
{
Element ele = new Element(_Doc, pList[i], "", pList[i].Name, true, false );
list.Add(ele);
}
}
/// <summary>
/// Save with the indentation and newlines
/// </summary>
/// <param name="file">file path</param>
/// <returns>true if successful</returns>
public bool PrettySave(string file)
{
if (_Doc == null)
return false;
XmlWriter writer = null;
try
{
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
settings.IndentChars = " ";
settings.NewLineChars = "\r\n";
settings.NewLineHandling = NewLineHandling.Replace;
settings.OmitXmlDeclaration = false;
writer = XmlWriter.Create(file, settings);
_Doc.Save(writer);
}
catch (System.Exception)
{
return false;
}
finally
{
if (writer != null)
{
writer.Close();
writer = null;
}
}
return true;
}
/// <summary>
/// Internal XML document object
/// </summary>
private XmlDocument _Doc;
}
}
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