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XML Adapters -> Simple-Reader, Writer

Update Notes:
- added an XML Adapter Reader Collection and some extra constructors / methods.
- added an attribute writer for XmlWriterAdapter

Update Clarifications
- These adapters are just to simplify things. The XmlDocument in ASP .Net is very verbose.
- If you want to open and modify a pre-existing XmlDocument, you'll have to write your own adapter. This doesn't really happen that often in what I do.

Simple stuff. These are just adapters to help separate xml document from the business logic. The Reader allows you to grab a child's value or a child's attribute. Also allows you to check to see if child exists. Lets you grab a node subset --> basically, if you sent it "childList" it would return a NodeList of grandChild's:

<currNode>
  <child1/>
  <child2/>
  <childList>
     <grandchild>
        
        
     </grandchild>
     <grandchild>
        
        
     </grandchild>
  </childList>
  <child4/>
</currNode>

-------------
The writer allows for creating nodes with values.
-- (I just added the attribute part. Not sure if it works, but it compiles.)
Also allows for appending those nodes. Lots of overloaded methods. Allows for printing the document.

Add & change as you will

#region XmlWriterAdapter and XmlReaderAdapter

#region XmlReaderAdapter
/// <summary>

/// Allows Easy Reading from XmlNodes

/// </summary>

public class XmlReaderAdapter {
	#region Attributes
	private XmlNode currNode;
	#endregion

	#region Constructors
	public XmlReaderAdapter(XmlNode currNode){
		this.currNode = currNode;
	}
	public XmlReaderAdapter(XmlDocument doc):this(doc.FirstChild){
	}
	#endregion

	#region Getting text and attribute values
	/// <summary>

	/// Get child value of a node.

	/// </summary>

	public string this[string child]{
		get{
			return currNode.SelectSingleNode("child::" + child).InnerText;
		}
	}
	/// <summary>

	/// Get child attribute.

	/// </summary>

	public string this[string child, string attribute]{
		get{
			return currNode.SelectSingleNode("child::" + child).Attributes[attribute].Value;
		}
	}
	#endregion

	#region Check if child exists
	/// <summary>

	/// Return whether child value exists.

	/// </summary>

	/// <param name="child"></param>

	/// <returns></returns>

	public bool hasChildValue(string child){
		return (hasChild(child) && (this[child].Length>0));
	}
	public bool hasChild(string child){
		return (this.currNode.SelectSingleNode("child::"+child)!=null);
	}
	#endregion

	#region Get Sub-Nodes - Old version
	/// <summary>

	/// Get Child node collection from a wrapper name - old version

	/// </summary>

	/// <param name="collectionWrapperChild"></param>

	/// <returns></returns>

	public XmlNodeList getSubNodeCollection(string collectionWrapperChild){
		return currNode.SelectSingleNode("child::" + collectionWrapperChild).ChildNodes;
	}
	#endregion

	#region Get SubNode / Children Adapter Collections - new version
	/// <summary>

	/// Get Child node collection from a wrapper name

	/// </summary>

	/// <param name="collectionWrapperChild"></param>

	/// <returns></returns>

	public XmlReaderAdapterCollection getSubNodeAdapterCollection(string collectionWrapperChild){
		return new XmlReaderAdapterCollection(currNode.SelectSingleNode("child::" + collectionWrapperChild).ChildNodes);
	}
	/// <summary>

	/// Get All Child nodes

	/// </summary>

	/// <param name="collectionWrapperChild"></param>

	/// <returns></returns>

	public XmlReaderAdapterCollection getAllChildren(){
		return new XmlReaderAdapterCollection(currNode.ChildNodes);
	}

	#endregion
}
#endregion

#region XmlReaderAdapterCollection
/// <summary>

/// Provides a strongly typed collection of XmlReaderAdapter objects.

/// </summary>

[Serializable()]
public class XmlReaderAdapterCollection : CollectionBase{
	/// <summary>

	/// Creates Default XmlReaderAdapterCollection

	/// </summary>

	public XmlReaderAdapterCollection(){
	}
	/// <summary>

	/// Creates XmlReaderAdapterCollection from a list of nodes

	/// </summary>

	public XmlReaderAdapterCollection(XmlNodeList nodes){
		foreach (XmlNode node in nodes){
			this.Add(new XmlReaderAdapter(node));
		}
	}/// <summary>

	/// Returns a XmlReaderAdapter object from the specified ordinal position within the collection.

	/// </summary>

	public XmlReaderAdapter this[int index]{
		get{
			return (XmlReaderAdapter)List[index];
		}
		set{
			List[index] = value;
		}
	}
	/// <summary>

	/// Adds a VersionCriteria to the VersionCriteriaCollection.

	/// </summary>

	/// <param name="value">The XmlReaderAdapter object to add to the collection.</param>

	/// <returns>The position within the collection that the XmlReaderAdapter object was added.</returns>

	public int Add(XmlReaderAdapter value){
		return(List.Add(value));
	}

	/// <summary>

	/// Determines the index in the XmlReaderAdapterCollection of the XmlReaderAdapter object specified.

	/// </summary>

	/// <param name="value">The VersionCriteria object to locate within the collection.</param>

	/// <returns>The index of the VersionCriteria object; if not found returns -1.</returns>

	public int IndexOf(XmlReaderAdapter value){
		return(List.IndexOf(value));
	}

	/// <summary>

	/// Adds the VersionCriteria object at the specified ordinal position in the collection.

	/// </summary>

	/// <param name="index">The zero based index at which the XmlReaderAdapter object should be added.</param>

	/// <param name="value">The XmlReaderAdapter to be added to the XmlReaderAdapterCollection.</param>

	public void Insert(int index, XmlReaderAdapter value){
		List.Insert(index, value);
	}

	/// <summary>

	/// Removes the XmlReaderAdapter object from the XmlReaderAdapterCollection.

	/// </summary>

	/// <param name="value">The XmlReaderAdapter object to remove.</param>

	public void Remove(XmlReaderAdapter value){
		List.Remove(value);
	}

	/// <summary>

	/// Determines if the XmlReaderAdapterCollection contains the specified XmlReaderAdapter object.

	/// </summary>

	/// <param name="value">The XmlReaderAdapter to search for.</param>

	/// <returns>true if the XmlReaderAdapter object is found in the collection; false if not.</returns>

	public bool Contains(XmlReaderAdapter value){
		return(List.Contains(value));
	}
}
#endregion

#region XmlWriterAdapter
/// <summary>

/// Allows Easy Writing of an XmlDocument

/// </summary>

public class XmlWriterAdapter{
	#region Properties and Attributes
	private XmlDocument doc;
	private string docNamespace;
	private XmlNode rootNode;
	/// <summary>

	/// Allows you to retrieve the RootNode, so you can append to the root if needed

	/// </summary>

	public XmlNode RootNode{
		get{
			return this.rootNode;
		}
	}
	/// <summary>

	/// Allows you to retrieve the XmlDocument in case you need to do something not

	/// defined here.

	/// </summary>

	public XmlDocument Doc{
		get{
			return this.doc;
		}
	}
	#endregion

	#region Constructors
	/// <summary>

	/// Creates a XmlWriterAdapter with no namespace (THIS IS NORMAL)

	/// </summary>

	/// <param name="rootNodeName"></param>

	public XmlWriterAdapter(string rootNodeName):this(string.Empty,rootNodeName){
	}
	/// <summary>

	/// Creates a XmlWriterAdapter with a namespace (CURRENTLY NOT USED)

	/// </summary>

	/// <param name="docNamespace"></param>

	/// <param name="rootNodeName"></param>

	public XmlWriterAdapter(string docNamespace, string rootNodeName){
		this.docNamespace = docNamespace;
		this.doc = new XmlDocument();
		rootNode = MakeAndSetElement(rootNodeName);
		doc.AppendChild(rootNode);
	}
	#endregion

	#region Creating Elements with inner text
	/// <summary>

	/// Creates and returns an element with the given name and NO value.

	/// </summary>

	/// <param name="name"></param>

	/// <returns></returns>

	public XmlNode MakeAndSetElement(string name){
		return doc.CreateNode(XmlNodeType.Element, name, docNamespace);
	}
	/// <summary>

	/// Creates and returns an element with the given name and value

	/// </summary>

	/// <param name="name"></param>

	/// <param name="value"></param>

	/// <returns></returns>

	public XmlNode MakeAndSetElement(string name, string value){
		XmlNode field = MakeAndSetElement(name);
		//if (value != string.Empty){

		field.InnerText = value;
		//}

		return field;
	}
	#endregion

	#region Add Attribute
	/// <summary>

	/// Makes and sets an attribute. 

	/// </summary>

	/// <param name="name"></param>

	/// <param name="value"></param>

	/// <param name="parent"></param>

	public void MakeAndSetAttribute(string name, string value, XmlNode parent){
		XmlAttribute field = doc.CreateAttribute(name, docNamespace);
		field.Value = value;
		parent.Attributes.Append(field);
	}
	#endregion

	#region Append Element
	/// <summary>

	/// Creates an element with the given name and value. Appends Element to the given parent.

	/// </summary>

	/// <param name="name"></param>

	/// <param name="value"></param>

	/// <param name="parent"></param>

	/// <returns></returns>

	public XmlNode AppendElement(string name, string value, XmlNode parent){
		return AppendElement(MakeAndSetElement(name,value),parent);
	}
	/// <summary>

	/// Creates an element with the given name and NO value. Appends Element to the given parent.

	/// </summary>

	/// <param name="name"></param>

	/// <param name="parent"></param>

	/// <returns></returns>

	public XmlNode AppendElement(string name, XmlNode parent){
		return AppendElement(MakeAndSetElement(name),parent);
	}
	/// <summary>

	/// Appends an element to the given parent.

	/// </summary>

	/// <param name="child"></param>

	/// <param name="parent"></param>

	/// <returns></returns>

	public XmlNode AppendElement(XmlNode child, XmlNode parent){
		parent.AppendChild(child);
		return child;
	}
	#endregion

	#region AppendElementToRoot
	/// <summary>

	/// Creates an element with the given name and NO value. Appends Element to the root.

	/// </summary>

	/// <param name="name"></param>

	/// <returns></returns>

	public XmlNode AppendElementToRoot(string name){
		return AppendElementToRoot(name,string.Empty);
	}
	/// <summary>

	/// Creates an element with the given name and value. Appends Element to the root.

	/// </summary>

	/// <param name="name"></param>

	/// <returns></returns>

	public XmlNode AppendElementToRoot(string name, string value){
		return AppendElementToRoot(MakeAndSetElement(name,value));
	}
	/// <summary>

	/// Appends an element to the root.

	/// </summary>

	/// <param name="child"></param>

	/// <param name="parent"></param>

	/// <returns></returns>

	public XmlNode AppendElementToRoot(XmlNode child){
		return AppendElement(child,this.rootNode);
	}
	#endregion

	#region Write XML
	/// <summary>

	/// Writes XML to string in Indented Format (good for debugging or printing to user)

	/// </summary>

	/// <returns></returns>

	public string WriteIndentedXML(){
		StringWriter strWriter = new StringWriter();
		XmlTextWriter xmlWriter = new XmlTextWriter(strWriter);
		xmlWriter.Formatting = Formatting.Indented;
		doc.WriteTo(xmlWriter);
		xmlWriter.Flush();
		strWriter.Flush();
		return strWriter.ToString();
	}
	/// <summary>

	/// Writes XML to string with no formatting (good for sending it to other programs)

	/// </summary>

	/// <returns></returns>

	public string WriteXML(){
		//System.Diagnostics.Trace.WriteLine(WriteIndentedXML());


		StringWriter strWriter = new StringWriter();
		XmlTextWriter xmlWriter = new XmlTextWriter(strWriter);
		xmlWriter.Formatting = Formatting.None;
		doc.WriteTo(xmlWriter);
		xmlWriter.Flush();
		strWriter.Flush();
		return strWriter.ToString();
	}
	#endregion
}
#endregion

#endregion

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