how to filter data from xml file for displaying only selected as nodes in treeview
- by michale
I have an xml file named "books.xml" provided in the link "http://msdn.microsoft.com/en-us/library/windows/desktop/ms762271(v=vs.85).aspx". What my requirement was to disaplay only the <title> from xml information as nodes in tree view. But when i did the following coding its displaying all the values as nodes like "catalog" as rootnode, book as parent node for all then author,title,genre etc as nodes but i want only root node catalogue and title as nodes not even book. Can any body guide me what modification i need to do in the exisitng logic for displaying title as nodes
OpenFileDialog dlg = new OpenFileDialog();
dlg.Title = "Open XML document";
dlg.Filter = "XML Files (*.xml)|*.xml";
dlg.FileName = Application.StartupPath + "\\..\\..\\Sample.xml";
if (dlg.ShowDialog() == DialogResult.OK)
{
try
{
//Just a good practice -- change the cursor to a
//wait cursor while the nodes populate
this.Cursor = Cursors.WaitCursor;
//First, we'll load the Xml document
XmlDocument xDoc = new XmlDocument();
xDoc.Load(dlg.FileName);
//Now, clear out the treeview,
//and add the first (root) node
treeView1.Nodes.Clear();
treeView1.Nodes.Add(new
TreeNode(xDoc.DocumentElement.Name));
TreeNode tNode = new TreeNode();
tNode = (TreeNode)treeView1.Nodes[0];
//We make a call to addTreeNode,
//where we'll add all of our nodes
addTreeNode(xDoc.DocumentElement, tNode);
//Expand the treeview to show all nodes
treeView1.ExpandAll();
}
catch (XmlException xExc)
//Exception is thrown is there is an error in the Xml
{
MessageBox.Show(xExc.Message);
}
catch (Exception ex) //General exception
{
MessageBox.Show(ex.Message);
}
finally
{
this.Cursor = Cursors.Default; //Change the cursor back
}
}}
//This function is called recursively until all nodes are loaded
private void addTreeNode(XmlNode xmlNode, TreeNode treeNode)
{
XmlNode xNode;
TreeNode tNode;
XmlNodeList xNodeList;
if (xmlNode.HasChildNodes) //The current node has children
{
xNodeList = xmlNode.ChildNodes;
for (int x = 0; x <= xNodeList.Count - 1; x++)
//Loop through the child nodes
{
xNode = xmlNode.ChildNodes[x];
treeNode.Nodes.Add(new TreeNode(xNode.Name));
tNode = treeNode.Nodes[x];
addTreeNode(xNode, tNode);
}
}
else //No children, so add the outer xml (trimming off whitespace)
treeNode.Text = xmlNode.OuterXml.Trim();
}
