C# IMansionContext类代码示例

		/// <summary>
		/// </summary>
		/// <param name="context"></param>
		protected override void DoExecute(IMansionContext context)
		{
			// get the properties
			var sectionProperties = GetAttributes(context);

			// get the section name
			string sectionName;
			if (!sectionProperties.TryGetAndRemove(context, "name", out sectionName))
				throw new InvalidOperationException("The attribute section name is required");

			// get the target field
			string targetField;
			sectionProperties.TryGetAndRemove(context, "targetField", out targetField);

			// push the section properties to the stack
			using (context.Stack.Push("Section", sectionProperties))
			{
				// render the section
				if (string.IsNullOrWhiteSpace(targetField))
				{
					using (templateService.Render(context, sectionName))
						ExecuteChildTags(context);
				}
				else
				{
					using (templateService.Render(context, sectionName, targetField))
						ExecuteChildTags(context);
				}
			}
		}

		/// <summary>
		/// Creates a filled nodeset.
		/// </summary>
		/// <param name="context">The <see cref="IMansionContext"/>.</param>
		/// <param name="properties"></param>
		/// <param name="records"></param>
		public RecordSet(IMansionContext context, IPropertyBag properties, IEnumerable<Record> records) : base(properties)
		{
			// validate arguments
			if (records == null)
				throw new ArgumentNullException("records");
			if (properties == null)
				throw new ArgumentNullException("properties");

			// set values
			foreach (var node in records)
				RowCollection.Add(node);
			Set("count", RowCollection.Count);

			// check for paging
			var totalRowCount = properties.Get(context, "totalCount", -1);
			var pageNumber = properties.Get(context, "pageNumber", -1);
			var rowsPerPage = properties.Get(context, "pageSize", -1);
			if (totalRowCount != -1 && pageNumber != -1 && rowsPerPage != -1)
				SetPaging(totalRowCount, pageNumber, rowsPerPage);

			// check for sort
			string sortString;
			if (properties.TryGet(context, "sort", out sortString))
			{
				foreach (var sort in Collections.Sort.Parse(sortString))
					AddSort(sort);
			}
		}

			/// <summary>
			/// Executes this tag.
			/// </summary>
			/// <param name="context">The <see cref="IMansionContext"/>.</param>
			protected override void DoExecute(IMansionContext context)
			{
				// get the web context
				var webContext = context.Cast<IMansionWebContext>();

				// get the column
				Column column;
				if (!webContext.TryPeekControl(out column))
					throw new InvalidOperationException(string.Format("'{0}' must be added to a '{1}'", GetType(), typeof (Column)));

				// get the property names on which to sort
				var propertyName = GetRequiredAttribute<string>(context, "on");

				// create the filter
				var sort = new ColumnSort
				           {
				           	PropertyName = propertyName
				           };

				// allow facets
				using (webContext.ControlStack.Push(sort))
					ExecuteChildTags(webContext);

				// set the sort to the column
				column.Sort = sort;
			}

		/// <summary>
		/// Processes the <paramref name="parameters"/> and turn them into <paramref name="query"/>.
		/// </summary>
		/// <param name="context">The <see cref="IMansionContext"/>.</param>
		/// <param name="parameters">The parameters which to process.</param>
		/// <param name="query">The <see cref="Query"/> in which to set the parameters.</param>
		protected override void DoProcess(IMansionContext context, IPropertyBag parameters, Query query)
		{
			var counter = 0;

			// check for id, guid or pointer
			int id;
			if (parameters.TryGetAndRemove(context, "id", out id))
			{
				query.Add(new IsPropertyEqualSpecification("id", id));
				counter++;
			}
			string guids;
			if (parameters.TryGetAndRemove(context, "guid", out guids) && !string.IsNullOrEmpty(guids))
			{
				// split the value
				var values = guids.Split(new[] {','}, StringSplitOptions.RemoveEmptyEntries).Select(x => x.Trim()).ToArray();
				query.Add(new IsPropertyInSpecification("guid", values));
				counter++;
			}
			NodePointer pointer;
			if (parameters.TryGetAndRemove(context, "pointer", out pointer))
			{
				query.Add(new IsPropertyEqualSpecification("id", pointer.Id));
				counter++;
			}

			// check for ambigous parameters
			if (counter > 1)
				throw new InvalidOperationException("Detected an ambigious id parmeters. Remove either id, guid or pointer.");
		}

        /// <summary>
        /// This method is called just after a node is updated by the repository.
        /// </summary>
        /// <param name="context">The <see cref="IMansionContext"/>.</param>
        /// <param name="record"> </param>
        /// <param name="properties">The properties which were set to the updated <paramref name="record"/>.</param>
        protected override void DoAfterUpdate(IMansionContext context, Record record, IPropertyBag properties)
        {
            // get the propagate property names
            var propagatePropertyNames = properties.Names.Where(x => x.StartsWith(PropagatePrefix, StringComparison.OrdinalIgnoreCase));

            // get the property names who's value is true
            var propagatedNowProperties = propagatePropertyNames.Where(x => properties.Get(context, x, false));

            // loop over all the updated properties and propagated properties
            foreach (var propagatePropertyName in propagatedNowProperties)
            {
                // get the name of the property being propagated
                var propagatedPropertyName = propagatePropertyName.Substring(PropagatePrefix.Length);

                // get the propagated property value
                var propagatedPropertyValue = properties.Get<object>(context, propagatedPropertyName);

                // retrieve all the children nodes and update them all
                foreach (var childNode in context.Repository.RetrieveNodeset(context, new PropertyBag
                                                                                      {
                                                                                      	{"parentSource", record},
                                                                                      	{"depth", "any"}
                                                                                      }).Nodes)
                {
                    context.Repository.UpdateNode(context, childNode, new PropertyBag
                                                                      {
                                                                      	{propagatedPropertyName, propagatedPropertyValue}
                                                                      });
                }
            }
        }

		/// <summary>
		/// Maps the given <paramref name="dbRecord"/> to <paramref name="properties"/>.
		/// </summary>
		/// <param name="context">The <see cref="IMansionContext"/>.</param>
		/// <param name="dbRecord">The <see cref="DbRecord"/> which to map.</param>
		/// <param name="properties">The <see cref="IPropertyBag"/> in which to store the mapped result.</param>
		protected override void DoMap(IMansionContext context, DbRecord dbRecord, IPropertyBag properties)
		{
			// field indices
			var idIndex = dbRecord.GetOrdinal("id");
			var parentPointerIndex = dbRecord.GetOrdinal("parentPointer");
			var nameIndex = dbRecord.GetOrdinal("name");
			var parentPathIndex = dbRecord.GetOrdinal("parentPath");
			var typeIndex = dbRecord.GetOrdinal("type");
			var parentStructureIndex = dbRecord.GetOrdinal("parentStructure");

			// assemble the node pointer
			var pointer = (dbRecord.IsDBNull(parentPointerIndex) ? string.Empty : dbRecord.GetString(parentPointerIndex) + NodePointer.PointerSeparator) + dbRecord.GetInt32(idIndex);
			var structure = (dbRecord.IsDBNull(parentStructureIndex) ? string.Empty : dbRecord.GetString(parentStructureIndex) + NodePointer.StructureSeparator) + dbRecord.GetString(typeIndex);
			var path = (dbRecord.IsDBNull(parentPathIndex) ? string.Empty : dbRecord.GetString(parentPathIndex) + NodePointer.PathSeparator) + dbRecord.GetString(nameIndex);
			var nodePointer = NodePointer.Parse(pointer, structure, path);

			// set the pointer
			properties.Set("pointer", nodePointer);
			properties.Set("path", nodePointer.PathString);
			properties.Set("structure", nodePointer.StructureString);
			properties.Set("depth", nodePointer.Depth);
			properties.Set("name", nodePointer.Name);
			properties.Set("type", nodePointer.Type);
			if (nodePointer.HasParent)
			{
				properties.Set("parentPointer", nodePointer.Parent);
				properties.Set("parentId", nodePointer.Parent.Id);
			}
		}

        /// <summary>
        /// This method is called just before a node is updated by the repository.
        /// </summary>
        /// <param name="context">The <see cref="IMansionContext"/>.</param>
        /// <param name="node">The node which will be modified.</param>
        /// <param name="modifiedProperties">The updated properties of the node.</param>
        protected override void DoBeforeUpdate(IMansionContext context, Node node, IPropertyBag modifiedProperties)
        {
            // if the name has not changed we are not interested
            string newName;
            if (!modifiedProperties.TryGet(context, "name", out newName))
                return;

            // if the name has not changed after normalization we are not interested
            newName = TagUtilities.Normalize(newName);
            if (node.Pointer.Name.Equals(newName))
            {
                modifiedProperties.Remove("name");
                return;
            }
            modifiedProperties.Set("name", newName);

            // if the tag is renamed to another already existing tag, move all content to that existing tag and delete this one
            Node existingTag;
            var tagIndexNode = TagUtilities.RetrieveTagIndexNode(context);
            if (TagUtilities.TryRetrieveTagNode(context, tagIndexNode, newName, out existingTag))
            {
                // TODO: move all content to the existing tag

                // TODO: delete this tag
            }
        }

		/// <summary>
		/// Constructs an section.
		/// </summary>
		/// <param name="context">The <see cref="IMansionContext"/>.</param>
		/// <param name="properties">The descriptor of this section.</param>
		/// <param name="expression">The expressio of this section.</param>
		public Section(IMansionContext context, IPropertyBag properties, IExpressionScript expression)
		{
			// validate arguments
			if (context == null)
				throw new ArgumentNullException("context");
			if (properties == null)
				throw new ArgumentNullException("properties");
			if (expression == null)
				throw new ArgumentNullException("expression");

			// set values
			Properties = properties;
			Expression = expression;
			Id = Guid.NewGuid().ToString();
			Name = Properties.Get<string>(context, "name");
			ShouldBeRenderedOnce = !Properties.Get(context, "repeatable", true);
			TargetField = Properties.Get(context, "field", Name);

			// check if there is a requires property
			string requiresExpressionString;
			if (Properties.TryGet(context, "requires", out requiresExpressionString))
			{
				// assemble the expression
				var expressionService = context.Nucleus.ResolveSingle<IExpressionScriptService>();
				var requiresExpression = expressionService.Parse(context, new LiteralResource(requiresExpressionString));

				// execute the expression
				areRequirementsSatisfied = requiresExpression.Execute<bool>;
			}
			else
				areRequirementsSatisfied = mansionContext => true;
		}

		/// <summary>
		/// </summary>
		/// <param name="context"></param>
		protected override void DoExecute(IMansionContext context)
		{
			// validate arguments
			if (context == null)
				throw new ArgumentNullException("context");

			// get the attributes
			var attributes = GetAttributes(context);
			string extension;
			if (!attributes.TryGet(context, "extension", out extension))
				attributes.Set("extension", TemplateServiceConstants.DefaultTemplateExtension);

			// get the resource paths
			var resourcePath = applicationResourceService.ParsePath(context, attributes);

			// get the resources
			IEnumerable<IResource> resources;
			if (GetAttribute(context, "checkExists", true))
				resources = applicationResourceService.Get(context, resourcePath);
			else
				applicationResourceService.TryGet(context, resourcePath, out resources);

			// open the templates and executes child tags);
			using (templateService.Open(context, resources))
				ExecuteChildTags(context);
		}

		/// <summary>
		/// Creates an instance of <see cref="ChildType"/> from <paramref name="descriptor"/>.
		/// </summary>
		/// <param name="context">The <see cref="IMansionContext"/>.</param>
		/// <param name="descriptor">The <see cref="ChildTypeDescriptor"/>.</param>
		/// <param name="behavior">The <see cref="CmsBehavior"/>.</param>
		public static void Create(IMansionContext context, ChildTypeDescriptor descriptor, CmsBehavior behavior)
		{
			// validate arguments
			if (context == null)
				throw new ArgumentNullException("context");
			if (descriptor == null)
				throw new ArgumentNullException("descriptor");
			if (behavior == null)
				throw new ArgumentNullException("behavior");

			// get the type
			var type = descriptor.Properties.Get<ITypeDefinition>(context, "type", null);
			var baseType = descriptor.Properties.Get<ITypeDefinition>(context, "baseType", null);
			if (type == null && baseType == null)
				throw new InvalidOperationException(string.Format("Invalid child type descriptor on type '{0}'. Specify either an type or a baseType.", descriptor.TypeDefinition.Name));
			if (type != null && baseType != null)
				throw new InvalidOperationException(string.Format("Invalid child type descriptor on type '{0}'. Ambigious type detected. Specify either an type or a baseType.", descriptor.TypeDefinition.Name));

			if (type != null)
				CreateChildType(context, descriptor, behavior, type);
			else
			{
				CreateChildType(context, descriptor, behavior, baseType);
				foreach (var inheritingType in baseType.GetInheritingTypes(context))
					CreateChildType(context, descriptor, behavior, inheritingType);
			}
		}

		/// <summary>
		/// </summary>
		/// <param name="context">The application context.</param>
		protected override void DoExecute(IMansionContext context)
		{
			// get all attributes
			var attributes = GetAttributes(context);

			// get the target attribute
			string target;
			if (!attributes.TryGetAndRemove(context, "target", out target) || string.IsNullOrEmpty(target))
				throw new InvalidOperationException("The target attribute is manditory");
			bool global;
			if (!attributes.TryGetAndRemove(context, "global", out global))
				global = false;

			// get the result
			var results = Get(context, attributes);

			// push the node to the stack in the target dataspace
			using (context.Stack.Push(target, results, global))
			{
				// check if the node was found
				if (results != null && results.RowCount > 0)
					ExecuteChildTags(context);
				else
				{
					// execute not found tag
					NotFoundTag notFoundTag;
					if (TryGetAlternativeChildTag(out notFoundTag))
						notFoundTag.Execute(context);
				}
			}
		}

		/// <summary>
		/// Prepares an insert query.
		/// </summary>
		/// <param name="context"></param>
		/// <param name="connection">The connection.</param>
		/// <param name="transaction">The transaction.</param>
		/// <param name="sourceNode"></param>
		/// <param name="targetParentNode"></param>
		/// <returns></returns>
		public void Prepare(IMansionContext context, SqlConnection connection, SqlTransaction transaction, Node sourceNode, Node targetParentNode)
		{
			// validate arguments
			if (connection == null)
				throw new ArgumentNullException("connection");
			if (transaction == null)
				throw new ArgumentNullException("transaction");
			if (sourceNode == null)
				throw new ArgumentNullException("sourceNode");
			if (targetParentNode == null)
				throw new ArgumentNullException("targetParentNode");

			// get the properties of the new node
			var newProperties = new PropertyBag(sourceNode);

			// if the target pointer is the same as the parent of the source node, generate a new name to distinguish between the two.
			if (sourceNode.Pointer.Parent == targetParentNode.Pointer)
			{
				// get the name of the node
				var name = sourceNode.Get<string>(context, "name");

				// change the name to indicate the copied node
				newProperties.Set("name", name + CopyPostfix);
			}

			// create an insert query
			command = context.Nucleus.CreateInstance<InsertNodeCommand>();
			command.Prepare(context, connection, transaction, targetParentNode.Pointer, newProperties);
		}

		/// <summary>
		/// </summary>
		/// <param name="context"></param>
		protected override void DoExecute(IMansionContext context)
		{
			// get the attributes
			var attributes = GetAttributes(context);

			// get the XML output pipe
			var outputPipe = context.OutputPipe as JsonOutputPipe;
			if (outputPipe == null)
				throw new InvalidOperationException("No JSON output pipe found on thet stack. Open an JSON output pipe first.");

			// start the element
			outputPipe.JsonWriter.WriteStartObject();

			// render the attributes
			foreach (var attribute in attributes)
			{
				outputPipe.JsonWriter.WritePropertyName(attribute.Key);
				outputPipe.JsonWriter.WriteValue(attribute.Value);
			}

			// render the children
			ExecuteChildTags(context);

			// finish the element
			outputPipe.JsonWriter.WriteEndObject();
		}

		/// <summary>
		/// Processes the <paramref name="parameters"/> and turn them into <paramref name="query"/>.
		/// </summary>
		/// <param name="context">The <see cref="IMansionContext"/>.</param>
		/// <param name="parameters">The parameters which to process.</param>
		/// <param name="query">The <see cref="Query"/> in which to set the parameters.</param>
		protected override void DoProcess(IMansionContext context, IPropertyBag parameters, Query query)
		{
			// check for search
			string where;
			if (parameters.TryGetAndRemove(context, "sqlWhere", out where) && !string.IsNullOrEmpty(where))
				query.Add(new SqlWhereSpecification(where));
		}

		/// <summary>
		/// Performs a search using the specified <paramref name="query"/>.
		/// </summary>
		/// <param name="context">The <see cref="IMansionContext"/>.</param>
		/// <param name="query">The <see cref="Query"/> on which to search.</param>
		/// <returns>Returns the resulting <see cref="RecordSet"/>.</returns>
		/// <exception cref="ArgumentNullException">Thrown if one of the parameters is null.</exception>
		/// <exception cref="ConnectionException">Thrown if a error occurred while executing the search query.</exception>
		public RecordSet Search(IMansionContext context, Query query)
		{
			// validate arguments
			if (context == null)
				throw new ArgumentNullException("context");
			if (query == null)
				throw new ArgumentNullException("query");

			// find the root type for this query
			var rootType = query.TypeHints.FindCommonAncestor(context);

			// resolve the index definitions of this record
			var indexDefinitions = indexDefinitionResolver.Resolve(context, rootType);

			// determine the index which to use to perform the search
			var indexDefinitionTypeMappingPair = SelectBestIndexForQuery(rootType, query, indexDefinitions);

			// create a search descriptor
			var search = new SearchQuery(indexDefinitionTypeMappingPair.Item1, indexDefinitionTypeMappingPair.Item2);

			// map all the query components to the search descriptor
			foreach (var component in query.Components)
				converters.Elect(context, component).Map(context, query, component, search);

			// execute the query
			return Search(context, search);
		}