/// <summary>
/// Load the root xml document and call the control's SetData method. Register for the control's AfterTreeUpdate
/// method so we can enable/disable various buttons.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ContentsTreeEditorDialog_Load(object sender, EventArgs e)
{
XmlDocument rootXml = new XmlDocument();
string msg = "Begin \r\n\r\n";
try
{
string treeXml = MetaTreeFactory.LockAndReadMetatreeXml();
msg += string.IsNullOrEmpty(treeXml) ? "treeXml is null" : "treeXml is not null";
msg += "\r\n\r\n";
rootXml.LoadXml(treeXml);
msg += "LoadXml success \r\n\r\n";
contentsTreeEditorControl1.SetData(rootXml);
msg += "SetData success \r\n\r\n";
if (!string.IsNullOrEmpty(_fullNodePath))
{
msg += "_fullNodePath is not null: " + _fullNodePath + " \r\n\r\n";
msg += (contentsTreeEditorControl1 == null) ? "contentsTreeEditorControl1 is null" : "contentsTreeEditorControl1 is not null";
msg += "SetData success \r\n\r\n";
contentsTreeEditorControl1.SetCurrentNode(_fullNodePath);
}
if (contentsTreeEditorControl1 == null)
{
msg += "contentsTreeEditorControl1 is null \r\n\r\n";
}
contentsTreeEditorControl1.AfterTreeUpdate += AfterTreeUpdate;
}
catch (Exception ex)
{
msg += "Unable to open the database contents tree for editing.\r\n\r\n" + ex.Message;
MessageBoxMx.ShowError(msg);
Close();
}
}
/// <summary>
/// Save the RootXml document after backing up the original.
/// </summary>
private bool SaveRootXml()
{
// don't do anything if there are no changes. If someone looks at the tree and makes no changes,
// then presses OK, no reason to save a backup and non-existent changes.
if (!contentsTreeEditorControl1.IsDirty)
{
return(true);
}
// get the new version of the Xml Data
XmlDocument rootXml = contentsTreeEditorControl1.GetData();
// if GetData returned null then we were unable to update the xml from the tree.
if (rootXml == null)
{
return(false);
}
// reformat XML so it is pretty and save to the SourceFile location
StringBuilder rootXmlSb = new StringBuilder();
XmlWriterSettings settings = new XmlWriterSettings {
NewLineChars = "\n", Indent = true
};
XmlWriter writer = XmlWriter.Create(rootXmlSb, settings);
rootXml.WriteTo(writer);
writer.Close();
SavedRootXml = rootXmlSb.ToString();
MetaTreeFactory.SaveMetaTreeXml(SavedRootXml);
return(true);
}
/// <summary>
/// Always release the XML file when the form closes.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ContentsTreeEditorDialog_FormClosed(object sender, FormClosedEventArgs e)
{
MetaTreeFactory.ReleaseMetaTreeXml(); // release control of tree
}
