public int AddNewNode(TreeViewMItem node)
{
string SQL = @"insert into [dbo].[TextNode_Table](Path, Content) values(@Path, @Content);
select @ID=@@IDENTITY;";
SqlParameter[] para =
{
new SqlParameter("@Path", SqlDbType.NVarChar),
new SqlParameter("@ID", SqlDbType.Int),
new SqlParameter("@Content", SqlDbType.NVarChar)
};
para[0].Value = node.Path;
para[1].Direction = ParameterDirection.Output;
para[2].Value = "<FlowDocument AllowDrop=\"True\" xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\"><Paragraph></Paragraph></FlowDocument>";
using (SqlConnection con = new SqlConnection(ConnectString)) {
SqlCommand cmd = new SqlCommand(SQL, con);
cmd.Parameters.AddRange(para);
con.Open();
cmd.ExecuteNonQuery();
node.ID = (int)para[1].Value;
}
return(node.ID);
}
private void SaveXmlNodes(ItemCollection nodesCollection, XmlWriter textWriter)
{
for (int i = 0; i < nodesCollection.Count; i++)
{
TreeViewMItem node = nodesCollection[i] as TreeViewMItem;
textWriter.WriteStartElement(XmlNodeTag); // <TreeNode>
textWriter.WriteAttributeString(XmlNodeIndex, node.ID.ToString()); // ID
textWriter.WriteAttributeString(XmlNodeTextAtt, node.Header.ToString()); // Header
if (node.IsExpanded == true)
{
textWriter.WriteAttributeString(XmlNodeExpandState, node.IsExpanded.ToString());////展开状态
}
if (node.IsSelected)
{
textWriter.WriteAttributeString(XmlNodeIsSelect, node.IsSelected.ToString());//是否选中
}
if (node.Tag != null)
{
textWriter.WriteAttributeString(XmlNodeTagAtt, node.Tag.ToString());
}
// add other node properties to serialize here
if (node.Items.Count > 0)
{
SaveXmlNodes(node.Items, textWriter);
}
textWriter.WriteEndElement();
}
}
private void SetAttributeValue(TreeViewMItem node, string propertyName, string value)
{
if (propertyName == XmlNodeTextAtt) //Header
{
node.Header = value;
}
else if (propertyName == XmlNodeExpandState)
{
//ExpandNode = node;
}
else if (propertyName == XmlNodeIsSelect)
{
//LastSelectNode = node;
}
else if (propertyName == XmlNodeTagAtt)
{
node.Tag = value;
}
else if (propertyName == XmlNodeIndex)
{
// 用来标识 这样看XML文件时结构清晰
node.ID = int.Parse(value);
}
}
public void LoadTreeViewState(TreeView treeView, string XML)
{
using (StringReader stringReader = new StringReader(XML)) {
using (XmlReader reader = XmlReader.Create(stringReader)) {
treeView.Items.Clear();
TreeViewMItem parentNode = null;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (reader.Name == XmlNodeTag)
{
TreeViewMItem newNode = new TreeViewMItem();
bool isEmptyElement = reader.IsEmptyElement;
// loading node attributes
for (int i = 0; i < reader.AttributeCount; i++)
{
reader.MoveToAttribute(i);
SetAttributeValue(newNode, reader.Name, reader.Value);
//SetTreeViewState(treeView);
}
// add new node to Parent Node or TreeView
if (parentNode != null)
{
parentNode.Items.Add(newNode);
}
else
{
treeView.Items.Add(newNode);
}
// making current node 'ParentNode' if its not empty
if (!isEmptyElement)
{
parentNode = newNode;
}
}
}
// moving up to in TreeView if end tag is encountered
else if (reader.NodeType == XmlNodeType.EndElement)
{
if (reader.Name == XmlNodeTag)
{
parentNode = parentNode.Parent as TreeViewMItem;
}
}
else if (reader.NodeType == XmlNodeType.XmlDeclaration) //Ignore Xml Declaration
{
}
else if (reader.NodeType == XmlNodeType.None)
{
return;
}
else if (reader.NodeType == XmlNodeType.Text)
{
parentNode.Items.Add(reader.Value);
}
}
}
}
}
