private void LoadMetadata(IBuilder oBuilder)
{
if (InvokeRequired)
this.Invoke(new LoadMetadataDelegate(LoadMetadata), new Object[] { oBuilder });
else
{
try
{
XmlDocument oDoc = new XmlDocument();
oDoc.AppendChild(oDoc.CreateXmlDeclaration("1.0", "UTF-8", "yes"));
XmlNode oNode = null;
string strStyleSheet = null;
if ((oBuilder is AsyncBuilder) && (oBuilder as AsyncBuilder).LoadingErrorOccurred)
{
DisplayMetadataMessage("The selected object failed to load.");
return;
}
else if (oBuilder.SupportsMetaData)
{
oNode = oBuilder.GetMetaData(oDoc);
if (oNode == null)
{
DisplayMetadataMessage("You do not have permission to view the metadata for this data layer.");
return;
}
strStyleSheet = oBuilder.StyleSheetName;
DisplayMetadataMessage("Loading metadata for layer " + oBuilder.Title + "...");
}
else if (!String.IsNullOrEmpty(oBuilder.MetadataDisplayMessage))
{
DisplayMetadataMessage(oBuilder.MetadataDisplayMessage);
return;
}
else
{
DisplayMetadataMessage("Metadata for the selected object is unsupported.");
return;
}
if (oNode is XmlDocument)
{
oDoc = oNode as XmlDocument;
}
else if (oNode is XmlElement)
{
oDoc.AppendChild(oNode);
}
if (strStyleSheet != null)
{
XmlNode oRef = oDoc.CreateProcessingInstruction("xml-stylesheet", "type='text/xsl' href='" + Path.Combine(this.metaviewerDir, strStyleSheet) + "'");
oDoc.InsertBefore(oRef, oDoc.DocumentElement);
}
string filePath = Path.Combine(this.metaviewerDir, Path.GetRandomFileName());
filePath = Path.Combine(Path.GetDirectoryName(filePath), Path.GetFileNameWithoutExtension(filePath) + ".xml");
oDoc.Save(filePath);
DisplayMetadataDocument(filePath);
}
catch (Exception e)
{
DisplayMetadataMessage("An error occurred while accessing metadata: " + e.Message);
}
}
}
