/// <summary>
/// Updates metadata object using latest category table and old categories collection
/// </summary>
/// <param name="metadataObject"></param>
/// <param name="oldCategories">oldCategories collection (key = nid and value = name)</param>
/// <param name="categoryTable">latest category table</param>
/// <returns></returns>
private MetadataInfo UpdateCategryInMetadataInfo(MetadataInfo metadataObject, Dictionary<int, string> oldCategories, DataTable categoryTable)
{
MetadataInfo RetVal = new MetadataInfo();
CategoryInfo CategoryObject;
foreach (DataRow categoryRow in categoryTable.Rows)
{
// create new category object for each category
CategoryObject = new CategoryInfo();
CategoryObject.CategoryName = Convert.ToString(categoryRow[Metadata_Category.CategoryName]);
CategoryObject.CategoryNId = Convert.ToInt32(categoryRow[Metadata_Category.CategoryNId]);
CategoryObject.MetadataText = string.Empty;
// check for key existance
if (oldCategories.ContainsKey(CategoryObject.CategoryNId))
{
// check old category name exists in metadata object as metadata object (or metadata text) build on Old categories name
if (metadataObject.Categories.ContainsKey(oldCategories[CategoryObject.CategoryNId]))
{
//-- if category exists in metadata text then update metadata text into category object
CategoryObject.MetadataText = metadataObject.Categories[oldCategories[CategoryObject.CategoryNId]].MetadataText;
}
}
//-- add category into Metadata info object
if (!RetVal.Categories.ContainsKey(CategoryObject.CategoryName))
{
RetVal.Categories.Add(CategoryObject.CategoryName, CategoryObject);
}
}
return RetVal;
}
/// <summary>
/// Returns MetadaataInfo object from the given metadata text
/// </summary>
/// <param name="mdElementType"></param>
/// <returns></returns>
private MetadataInfo GetMetadataInfoFrmMetadataText(string metadataText, MetadataElementType mdElementType)
{
MetadataInfo RetVal = new MetadataInfo();
CategoryInfo Category;
XmlDocument XmlDoc;
//string ConcatinatedParaNodeText = string.Empty;
//XmlElement CategoryNode = default(XmlElement);
//XmlNode CategoryXmlNode = null;
//DataTable CategoryTable;
//XmlElement RootNode = default(XmlElement);
//XmlDocument XmldocumentNew = new XmlDocument();
//XmlDeclaration xmlDeclaration = default(XmlDeclaration);
//string XmlString = string.Empty;
//String ConcatenatedParaNodeText = string.Empty;
//string CategoryParaXml;
try
{
//xmlDeclaration = XmldocumentNew.CreateXmlDeclaration("1.0", "utf-8", null);
//RootNode = XmldocumentNew.CreateElement(MetadataManagerConstants.Metadata);
//XmldocumentNew.InsertBefore(xmlDeclaration, XmldocumentNew.DocumentElement);
//XmldocumentNew.AppendChild(RootNode);
//--Load xml from database.
XmlDoc = new XmlDocument();
XmlDoc.LoadXml(metadataText);
//--get categories
foreach (XmlNode Node in XmlDoc.SelectNodes("metadata/Category"))
{
Category = new CategoryInfo();
Category.CategoryName = Convert.ToString(Node.Attributes["name"].Value);
Category.CategoryType = DIQueries.MetadataElementTypeText[mdElementType];
// get metadata text from xml's Para node
if (Node.ChildNodes.Count > 0)
{
Category.MetadataText = Convert.ToString(Node.ChildNodes[0].InnerXml);
}
// add category into metadataInfo object
if (!RetVal.Categories.ContainsKey(Category.CategoryName))
{
RetVal.Categories.Add(Category.CategoryName, Category);
}
}
//foreach (DataRow CategoryNameRow in CategoryTable.Rows)
//{
// Category = new CategoryInfo();
// Category.CategoryName = Convert.ToString(CategoryNameRow[DIColumns.Metadata_Category.CategoryName]);
// Category.CategoryType = metadataType.ToString();
// //--Create new xmlelement as Category
// CategoryNode = XmldocumentNew.CreateElement(MetadataManagerConstants.Category);
// //--Set attribute values of category element.
// CategoryNode.SetAttribute(MetadataManagerConstants.NameAttribute, Category.CategoryName);
// //--Select Category node with appropriate attribute name(category name)
// CategoryXmlNode = XmlDoc.SelectSingleNode(MetadataManagerConstants.CategoryName + Category.CategoryName + MetadataManagerConstants.ClosingSymbol);
// //--Add in category collection
// if (CategoryXmlNode != null)
// {
// CategoryParaXml = CategoryXmlNode.InnerXml;
// Category.MetadataText = CategoryXmlNode.InnerXml;
// //--check for category in collection
// if (!RetVal.Categories.ContainsKey(Category.CategoryName))
// {
// RetVal.Categories.Add(Category.CategoryName, Category);
// }
// }
//}
//return RetVal;
}
catch
{
RetVal = null;
}
return RetVal;
}