/// <summary>
/// Replace tree node anywhere in the node hierarchy
/// </summary>
/// <param name="treeNodeToReplace"></param>
/// <param name="replacementElement"></param>
/// <returns>Tuple containing 2 tree nodes: Item1 = root node (to repopulate treDataNodes) and Item2 = replacement node (to make it selected node)</returns>
private Tuple <TreeNode, TreeNode> ReplaceTreeNode(TreeNode treeNodeToReplace, XElement replacementElement)
{
var oldNodeData = (XmlNodeData)treeNodeToReplace.Tag;
var index = oldNodeData.SeqNo; //index to replace node in the parent node
var newNodeData = new XmlNodeData(replacementElement, oldNodeData.Level, index);
var replacementTreeNode = CreateTreeNodeHierarchy(newNodeData);
var parentNode = treeNodeToReplace.Parent;
TreeNode rootNode;
if (parentNode == null)
{ //end of recursion, mark the new root node (to be kept as Item1 in return value)
rootNode = replacementTreeNode;
}
else
{ //update parent node (recursively)
parentNode.Nodes.RemoveAt(index);
parentNode.Nodes.Insert(index, replacementTreeNode);
//newParentElement is the same as current, except for the current element
var parentNodeData = (XmlNodeData)parentNode.Tag;
var replacemeentParentElement = new XElement(parentNodeData.Name);
replacemeentParentElement.Add(parentNodeData.Attributes);
replacemeentParentElement.Add(parentNodeData.Element.Elements().Select((e, i) => i == newNodeData.SeqNo ? replacementElement : e));
var newNodes = ReplaceTreeNode(parentNode, replacemeentParentElement);
rootNode = newNodes.Item1;
}
return(Tuple.Create(rootNode, replacementTreeNode));
}
/// <summary>
/// Creates a hierarchy of tree nodes for a given XmlNodeData object
/// </summary>
/// <param name="hierarchyRoot"></param>
/// <returns></returns>
private TreeNode CreateTreeNodeHierarchy(XmlNodeData hierarchyRoot)
{
var newTreeNode = new TreeNode(hierarchyRoot.FullName)
{
Tag = hierarchyRoot // //Tag property of each tree node contains a XmlNodeData object that describes node contents
};
foreach (var child in hierarchyRoot.Children)
{
newTreeNode.Nodes.Add(CreateTreeNodeHierarchy(child));
}
return(newTreeNode);
}
/// <summary>
/// Accept an XML string, parse it and populate the form with it.
/// </summary>
/// <param name="xmlData">The XML string to parse and display.</param>
/// <returns>true if data sucessfully assigned, false if submitted XML is invalid.</returns>
public bool AssignFacetsData(string xmlData)
{
XmlNodeData xmlNodeData;
try { xmlNodeData = new XmlNodeData(xmlData); }
catch (System.Xml.XmlException)
{
MessageBox.Show("Submitted text is not a valid XML.", "FacetsDataExplorer", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(false);
}
var rootNode = CreateTreeNodeHierarchy(xmlNodeData);
PopulateTreeView(rootNode);
//// this.treDataNodes.SelectedNode = rootNode;
this.txtNodeContents.Clear();
return(true);
}