Special Functions
- Audit Trail panel
- Authentication via Kerberos, basics
- Common Name Service (CNS)
  - Editor
  - Viewer
  - OPC
  - Modbus
  - MQTT
  - Log
  - Nodetype
  - CNS Control Functions
    - cnsGetChildren
      Returns the ID paths of all child element of a node.
    - cns_getNodeTypeValue
      Returns the value of the given node type.
    - cns_setNodeTypeIcon
      Allows to set an icon for the given node type.
    - cns_deleteViewDp
      Deletes the internal data point which is linked to the given view.
    - cnsRemoveProperty
      Removes the key from the property of the given node.
    - cnsGetUserData
      Returns the user data stored in a node.
    - cnsGetNodesByName()
      Looks for ID paths of nodes that match the given criteria.
    - cns_isNode
      Checks whether the given ID path is a node.
    - cnsAddNode
      Adds a new node to a tree or sub-tree.
    - cns_getNodeTypes
      Returns all existing node types.
    - cns_checkId
      Checks whether the ID is valid.
    - cns_getReadableViews
      Returns a list with all views (for which the current permission is sufficient) of the given system.
    - cnsChangeViewName
      Changes the ID of the given view.
    - cns_getViewPermission
      Returns the permission bits defined for the given view.
    - cns_isView
      Checks whether the given ID is a view.
    - cns_createView
      Creates a new view.
    - cns_createTreeOrNode
      Creates a tree or a node and adds it to the given parent element.
    - cnsGetAccessRight
      Returns the AccessRight (value of the defined parameter "propertyKey") as UINT for the given node.
    - cnsGetTrees
      Returns the ID paths of all trees of the given view.
    - cns_createNodeType
      Creates a new node type.
    - cns_viewNameToDpName
      Returns the name of the internal data point linked to the given view.
    - cns_deleteView
      Deletes the given view.
    - cns_setViewPermission
      Sets the permission for the given view.
    - cnsChangeViewDisplayNames
      Changes the display name of the given tree.
    - cnsSetProperty
      Sets the properties for the given node as key/value pair.
    - cnsGetDisplayPath
      Returns the display name path of a node
    - cnsAddTree
      Allows to create a tree or sub-tree.
    - cns_nodeExists
      Checks if the given node exists.
    - cns_checkName
      Checks whether the given display name is valid.
    - cnsGetSystemNames
      Returns the display names of the given system.
    - cns_getNodeTypeIcon
      Returns the icon path of the given node type.
    - cnsChangeNodeName
      Changes the ID of the given node.
    - cnsGetProperty
      Retrieves the key value from the property of the defined node.
    - cns_treeExists
      Checks whether the given tree exists.
    - cnsChangeNodeData
      Changes the data point (element) and type of the given node.
    - cnsGetViews
      Returns the paths of all views in the given system.
    - cnsSetUserData
      Stores user data in a node.
    - cnsGetDisplayNames
      Returns the display names of a node.
    - Common Name Service Control Functions
      The following control functions are provided for an easier use of the Common Name Service feature in scripts.
    - cnsGetId
      Returns the linked data point and CNSDataIdentifierType of the given node.
    - cnsGetIdSet()
      Returns the names of data points linked to the matching nodes.
    - cns_setNodeTypeDisplayName
      Sets the multilingual display name of a node type.
    - cnsChangeNodeDisplayNames
      Changes the display name of the given node.
    - cnsSubStr
      Extracts parts of a CNS path.
    - cns_changeViewName
      Changes the ID of the given view.
    - cnsRemoveObserver
      De-registers the given observer function.
    - cnsGetViewDisplayNames
      Returns the display names of the given view.
    - cnsGetViewSeparators
      Returns the separators of the given view.
    - cnsAddObserver
      Registers the given function as CNS observer.
    - cns_viewDpToName
      Returns the ID of the view which is linked to the given internal data point.
    - cns_setNodeTypeValue
      Sets the value of the given node type.
    - cnsChangeTree
      Replaces a tree or sub-tree with a new tree.
    - cnsDeleteTree
      Allows to delete a tree, sub-tree or node.
    - cnsSetSystemNames
      Changes the display name of the given system.
    - cns_setNodeIcon
      Sets an icon for the given node.
    - cnsGetNodesByData
      Looks for nodes that are linked to the given data point (element).
    - cns_deleteTreeOrNode
      Deletes the given tree or node.
    - cns_checkSeparator
      Checks if the separator is valid or not.
    - cnsCreateView
      Allows to create a new view.
    - cns_getNodeTypeDisplayName
      Returns the display name of the given node type.
    - cns_viewExists
      Checks whether the given view exists or not.
    - cns_isTree
      Checks whether the given node ID is a tree or not.
    - cns_getNodeIcon
      Returns the path of the icon defined for the given ID.
    - cnsGetRoot
      Returns the ID path of the root node of the tree which contains the given node.
    - cnsGetParent
      Returns the path of the parent node.
    - cnsGetOPCAccessRight
      Returns the OPC AccessLevel (value of the key OA:OPC) as UINT for the given node.
    - cns_changeNodeTypeName
      Changes the ID of a node type.
    - cnsChangeViewSeparators
      Changes the separators of the given view.
    - cns_deleteNodeType
      Deletes the given node type.
    - cnsDeleteView
      Allows to delete a view (with all its trees).
    - cns_createViewDp
      Creates a internal data point for the given view.
    - cnsGetPropertyKeys
      Returns a list of all keys which are defined for the given node.
- COM in WinCC OA, basics
- OLE DB Provider
- CtrlExtension, basics
- CTRL OA Unit
- DBLogger, basics
- Input Recording
- Generic Dialog Framework
- HTTP Server
- DP Identification
- Insights Hub Connector
- Message Compression
- Node-RED
- Panel topology/Group alert facility
- PM Agent
- Redundant network connections
- Redundancy, basics
- XML Reporting
- Reporting with Panels (Silent print)
- Recipes, basics
- REST Reporting API
- Scheduler, basics
- Security
- System Use Notification
- System Overview
- Alive mechanism of manager connections
- Basics on Encryption
- Distributed systems, basics
- Maintenance package, basics
- Wizard Framework
- XML panel format, basics
- XML-RPC, Basics
- XMPP Basics

cns_treeExists

Checks whether the given tree exists.

Synopsis

int cns_treeExists(string sTreePath);

Parameters


Parameter	Description
sTreePath	ID path of the tree that shall be checked

Return value

Returns TRUE if the given tree exists, otherwise FALSE.

Errors

Description

This function checks whether a tree with the given ID exists.

main()
{
  cns_treeExists("System1.View1:IAmATree");
}

Availability

UI, CTRL