Class AstExpressionTaskNode
The Expression Task will execute an SSIS expression. It is often used as a convenient host for variable assignments or to serve as a placeholder for control flow branching.
public class AstExpressionTaskNode : AstTaskBaseNode, IBindableItem, IGetJsonProvider, INamedNode, IScopeBoundary, IReferenceableItem, IFrameworkItem, IValidationInfo, INamedItem, IDataflowItem
- Inheritance
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System.ObjectAstExpressionTaskNode
Varigence.Utility.Collections.IVulcanCollectionParent, Varigence.Utility.ComponentModel.IVulcanNotifyPropertyChanged, Varigence.Utility.ComponentModel.IPropertyChangeNotificationTarget, System.ComponentModel.INotifyPropertyChanged, Varigence.Utility.Xml.IXObjectMappingProvider, System.ComponentModel.IDataErrorInfo, Varigence.Utility.Collections.IScopedNameIndexable,
Constructors
| AstExpressionTaskNode(IFrameworkItem) | Initializes a new instance of the AstExpressionTaskNode class with the specified parent node. |
Fields
| ScopedNamePrefixBackingStore | |
| IsScopeImported |
Properties
| Expression | Specifies the SSIS expression that will be evaluated by the Expression Task. |
| ExpressionDefaultValue | Gets the default value for the Expression property |
| FriendlyTypeNameStatic | Gets the friendly name of the type of this node |
| ExecutionValueVariable | Specifies a variable to hold the execution results of this component. |
| VisibleVariables | Gets a collection of all variable nodes that are available to be used by this task. It includes variables defined by this task and any tasks/packages that contain this task |
| VisiblePackageParameters | Gets a collection of all package parameter nodes that are available to be used by this task. |
| VisibleProjectParameters | Gets a collection of all project parameter nodes that are available to be used by this task. This include all parameters defined by all package projects that contain the parent package for this task. |
| OutputPath | Gets a default OutputPath that all subsequent nodes will connect to, if they choose to create a precendence constraint |
| SystemVariables | Gets a collection of all variables defined in this task that have been provided by SSIS as system variables |
| PrecedenceConstraints | This is a container for task precedence constraint definitions. |
| Events | This is a collection of event handlers that can respond to SQL Server Integration Services events that are raised on this task. |
| DelayValidation | This value specifies whether the validation of the Dataflow task in SSIS should be delayed until the package is executed. DelayValidation is most often used when the ETL process references tables and other server assets that were created in an earlier stage of the data processing run. |
| IsolationLevel | Sets the Isolation Level which controls how Transactions behave for this container. |
| ForcedExecutionValue | If the ForceExecutionValue property is set to True, then the container will return the value stored in this property as its execution value. Otherwise, this value will be ignored. The default value for ForecedExecutionValue is 0. |
| ForceExecutionResult | This value indicates whether a specified execution result value will result if the container runs. The default value is None, which means that the container does not force a specified outcome. |
| ForceExecutionValue | Gets or sets a Boolean that indicates whether the execution value of the container should be forced to contain the value specified in the ForcedExecutionValue property. |
| ForcedExecutionValueDataType | This property specifies the data type of the value stored in the ForceExecutionValue property. |
| Disabled | This value specifies whether the item is disabled. The default value is False. |
| FailPackageOnFailure | This value determines whether the container will fail when a container component fails. If this container corresponds to a package, then the only valid value is False. |
| FailParentOnFailure | This value determines whether the parent container will fail when a child container failes. The default value is False. |
| MaximumErrorCount | This value specifies the maximum number of errors allowed to occur before a package is forced to stop running. The default value is 1. |
| Language | This specifies the default language to be used by this task and its descendants. |
| DisableEventHandlers | This value specifies whether the event handlers for this task, container, or package should be prevented from executing. The default value is False. |
| TransactionMode | This value specifies the transaction context in which this task will execute. |
| Variables | This is a container for variable definitions that are specific to this task, container, or package. |
| LoggingMode | This value specifies whether logging is enabled or disabled by the container or by the parent container. The default value is UseParentSetting. |
| LogEvents | This is a container for log event definitions that are specific to this task, container, or package. |
| LogProviders | Defines the log providers to use for the SSIS task or container |
| Expressions | This is a collection of SSIS expression definitions for property value overrides that are specific to this task, container, or package. |
| Id | Allows the developer to specify a unique identifier (GUID) for the package. This can be used to retain a consistent ID between builds. |
| DelayValidationDefaultValue | Gets the default value for the DelayValidation property |
| IsolationLevelDefaultValue | Gets the default value for the IsolationLevel property |
| ForcedExecutionValueDefaultValue | Gets the default value for the ForcedExecutionValue property |
| ForceExecutionResultDefaultValue | Gets the default value for the ForceExecutionResult property |
| ForceExecutionValueDefaultValue | Gets the default value for the ForceExecutionValue property |
| DisabledDefaultValue | Gets the default value for the Disabled property |
| FailPackageOnFailureDefaultValue | Gets the default value for the FailPackageOnFailure property |
| FailParentOnFailureDefaultValue | Gets the default value for the FailParentOnFailure property |
| MaximumErrorCountDefaultValue | Gets the default value for the MaximumErrorCount property |
| LanguageDefaultValue | Gets the default value for the Language property |
| DisableEventHandlersDefaultValue | Gets the default value for the DisableEventHandlers property |
| TransactionModeDefaultValue | Gets the default value for the TransactionMode property |
| LoggingModeDefaultValue | Gets the default value for the LoggingMode property |
| IdDefaultValue | Gets the default value for the Id property |
| ScopedName | Gets the scoped name which can be used to uniquely identify this object among other objects of its type |
| SymbolTable | Gets a reference to the symbol table that stores a reference to this and all other named objects in the project |
| SsisSafeScopedName | Returns a version of the ScopedName that has been cleaned of invalid characters for SSIS. |
| SsisSafeName | Returns a version of the Name that has been cleaned of invalid characters for SSIS. |
| Name | Specifies the name of the object. This name can be used to reference this object from anywhere else in the program. |
| References | Gets collection of FrameworkItemReference objects, which track rich information about the properties that hold references to this node. |
| NameDefaultValue | Gets the default value for the Name property |
| Guid | |
| Annotations | This is a collection of annotation items that can be used to specify documentation, tags, or other information. Annotations are particularly useful for storing information about nodes that can be used by BimlScript code. |
| ObjectTag | This property provides a general purpose storage mechanism for .NET objects to be associated with AstNode objects. It supplements the annotation system, which is intended for use with string-based metadata. |
| BimlFile | This value specifies the BimlFile in which the Biml code that defines AstNode resides. |
| ItemLabel | Gets a label that can be used to identify this node |
| ParentItem | This value specifies the parent of the current node. All nodes must have a valid parent in the Biml framework, except for the root node. |
Methods
| BindingScopeBoundaries() | Retrieves the permitted scope boundaries to bind references from this node. |
| Duplicate() | Creates a duplicate of the current node |
| Duplicate(IFrameworkItem) | Creates a duplicate of the current node with the specified parent item |
| GetDefaultValue(String) | Retrieves the default value for the property with the name propertyName |
| GetDefaultValue<T>(String) | Retrieves the default value for the property with the name propertyName |
| StructureEquals(Object) | Compares this node to the provided object to determine if all defined children and references are equal. |
| GetAllItemsReferencedByDefinedSuccessors() | Builds a list of all items referenced by this node and its successors. Each tuple in the returned list represents a FrameworkItemReference. The first item is the ReferencingItem, the second item is the property name, and the third item is the ReferencedItem. |
| BindReference(SymbolTable, String, Boolean, String, Int32, Boolean) | |
| AddExpressionProperty(AstPropertyNode) | |
| CreateVariable(String, String, String, Boolean, Boolean, IncludeInDebugDump, TypeCode, Object) | Adds a variable with this task as the parent node |
| AddVariable(String, String, String, Boolean, Boolean, IncludeInDebugDump, TypeCode, Object) | Adds a variable with this task as the parent node |
| DefinedAstNodes() | Retrieves a collection of nodes that have been defined as direct children of the current node. |
| GetSchemaLocalName() | Retrieves the local XML element name that corresponds to this node in Biml code. |
| ParseChild(XElement, ParserContext) | |
| GetBimlChildFragment(CulturedStringBuilder, Int32) | |
| HasAnyBimlChildNodes() | |
| ToString() | Returns a string that represents the current object. In this case, it is the Name of the node. |
| OnScopedNameChanged(String, String) | |
| OnItemLabelChanged(String, String) | |
| OnNameChanging(String, String) | |
| OnNameChanged(String, String) | |
| AddScopedNameChangedEventListener(IReferenceableItem, EventHandler<VulcanPropertyChangedEventArgs>) | Adds the scoped name changed event handler to the specified referenceable item. |
| RemoveScopedNameChangedEventListener(IReferenceableItem, EventHandler<VulcanPropertyChangedEventArgs>) | Removes the scoped name changed event handler from the specified referenceable item. |
| FirstChildOfType<TChild>() | Gets the first defined descendant node of the specified type |
| RemoveFromParent() | Removes this node definition from its parent |
| GetJson() | Generates a JavaScript Object Notation (JSON) representation of the current node |
| GetExternalJson() | Generates a JavaScript Object Notation (JSON) representation of the current node |
| GetJson(Boolean, Boolean, Boolean, Boolean, Boolean) | Generates a JavaScript Object Notation (JSON) representation of the current node |
| GetXObjectName() | Gets the fully qualified XML element name for this node in the code document. |
| FirstParent<TAstNode>() | Retrieves the first parent or ancestor node of the specified type |
| FirstParent<TAstNode>(Type) | Retrieves the first parent or ancestor node of the specified type with the specified custom attribute type |
| FirstThisOrParent<TAstNode>() | Retrieves the first parent or ancestor node of the specified type, including this node |
| IsDirectAncestor(IFrameworkItem) | Retrieves a value indicating whether the specified node is a direct ancestor of this node. |
| AncestorDistance(IFrameworkItem) | Retrieves the number of steps between this node and the nearest shared ancestor with the specified relative node. |
| FirstThisOrParent<TAstNode>(Type) | Retrieves the first parent or ancestor node (including this node) of the specified type with the specified custom attribute type |
| AllDefinedSuccessors() | Retrieves the collection of all nodes defined as a child of this or any successor node or the current node |
| AllDefinedSuccessors(Boolean) | Retrieves the collection of all nodes defined as a child of this or any successor node or optionally the current node |
| OnNotificationTargetPropertyChanged(String) | |
| OnScopeBoundaryChanged(IScopeBoundary, IScopeBoundary) | |
| AddParseableChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| RemoveParseableChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| AddScopeBoundaryChangedEventListener(IFrameworkItem, EventHandler<VulcanPropertyChangedEventArgs>) | |
| RemoveScopeBoundaryChangedEventListener(IFrameworkItem, EventHandler<VulcanPropertyChangedEventArgs>) | |
| AddParsePendingChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| RemoveParsePendingChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| AddFromTemplateChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| RemoveFromTemplateChangedEventListener(IFlowFileChanged, EventHandler<EventArgs>) | |
| ParseSelf(XElement, ParserContext) | |
| ParseNameValueMapping(XElement) |