_EasyDAClient Interface Methods

For a list of all members of this type, see _EasyDAClient members.

Public Methods

	Name	Description
	BrowseAccessPathList	Browses the possible access paths of a specified OPC item. Specify server descriptor, and node descriptor.
	BrowseAccessPaths	Browses the possible access paths of a specified OPC item. Specify server descriptor, and node descriptor.
	BrowseBranches	Browse for child branches. Specify machine name, and server class.
	BrowseLeaves	Browse for child leaves. Specify machine name, and server class.
	BrowseNodes	Browses the specified branch (or root) in OPC server's address space, and returns information about child nodes (both branches and leaves) found. Specify server descriptor, parent item ID, and node filter.
	BrowseProperties	Browse for available item properties of a specified OPC item. Specify server descriptor, and node descriptor.
	BrowseServers	Browses the specified computer and returns information about OPC (Data Access) servers found.
	ChangeItemSubscription	Changes parameters of a subscription. Specify handle, and requested update rate.
	ChangeItemSubscriptionList	Changes parameters of subscriptions to multiple OPC items.
	ChangeMultipleItemSubscriptions	Changes parameters of subscriptions to multiple OPC items.
	Clone
	Equals
	GetHashCode
	GetItemSubscriptionArguments	Obtains parameters of specified item subscription.
	GetMultiplePropertyValues	Gets values of multiple OPC properties, specifying an array of property arguments objects.
	GetPropertyValue	Gets a value of OPC property, using individual parameters specifying the OPC server, and OPC Item ID.
	GetPropertyValueList	Gets values of multiple OPC properties, specifying an array of property arguments objects.
	GetService
	GetServiceByName	Gets the service object of the specified type, given by type name.
	GetType
	IsKnownItemSubscriptionHandle	Determines whether the given item subscription handle is known to this client.
	PullItemChanged	Attempts to pull an OPC item change subscribed to by the OpcLabs.EasyOpc.DataAccess.IEasyDAClient.SubscribeMultipleItems or SubscribeItem method.
	PullItemChangeList	Attempts to pull multiple OPC item changes subscribed to by the OpcLabs.EasyOpc.DataAccess.IEasyDAClient.SubscribeMultipleItems or SubscribeItem method.
	PullMultipleItemChanges	Attempts to pull multiple OPC item changes subscribed to by the OpcLabs.EasyOpc.DataAccess.IEasyDAClient.SubscribeMultipleItems or SubscribeItem method.
	ReadItem	Reads a named item using individual parameters specifying its location, and using server's canonical data type.
	ReadItemList	Reads multiple named items from an OPC server or OPC servers, using array of argument objects as an input. Values, qualities and timestamps are returned.
	ReadItemValue	Reads a value of named item using individual parameters specifying its location, using server's canonical data type.
	ReadItemValueList	Reads multiple named item values from a single OPC server, using array of argument objects as an input.
	ReadMultipleItems	Reads multiple named items from an OPC server or OPC servers, using array of argument objects as an input. Values, qualities and timestamps are returned.
	ReadMultipleItemValues	Reads multiple named item values from a single OPC server, using array of argument objects as an input.
	Reset	Sets the object properties back to their defaults.
	SubscribeItem	Subscribe to OPC item. Specify machine name, server class, item ID, and requested update rate. No state object is specified (this overload is suitable for simple scenarios only).
	SubscribeItemList	Subscribe to changes of multiple OPC items. The OpcLabs.EasyOpc.DataAccess.IEasyDAClient.ItemChanged event will be generated for each significant item change. Callback methods will be invoked if they are specified in the argument objects.
	SubscribeMultipleItems	Subscribe to changes of multiple OPC items. The OpcLabs.EasyOpc.DataAccess.IEasyDAClient.ItemChanged event will be generated for each significant item change. Callback methods will be invoked if they are specified in the argument objects.
	ToString
	UnsubscribeAllItems	Unsubscribe from changes of all OPC items.
	UnsubscribeItem	Unsubscribe from OPC item, specifying its handle.
	UnsubscribeItemList	Unsubscribe from changes of multiple OPC items, specifying an "enumerable" of integer handles.
	UnsubscribeMultipleItems	Unsubscribe from changes of multiple OPC items, specifying an "enumerable" of integer handles.
	ValueEquals	Defines a generalized method that classes must implement to create type-specific method for determining value equality of instances. Determines whether `this` instance has the same value as a given other instance.
	WaitForItemValue	Waits until the OPC-DA item quality becomes "good". Specify machine name, server class, item descriptor, group parameters, and timeout in milliseconds.
	WaitForMultipleItemValueList	Waits until the OPC-DA items reach the given minimum quality. Specify arguments objects, minimum quality, and timeout in milliseconds.
	WaitForMultipleItemValues	Waits until the OPC-DA items reach the given minimum quality. Specify arguments objects, minimum quality, and timeout in milliseconds.
	WriteItem	Writes separately given value, timestamp and quality into a named item using individual parameters specifying its location, and a specific data type.
	WriteItemList	Writes named items into an OPC server or OPC servers. Values, qualities and timestamps are written.
	WriteItemValue	Writes a value into a named item using individual parameters specifying its location, and using server's canonical data type.
	WriteItemValueList	Writes named items into an OPC server or OPC servers. Values, qualities and timestamps are written.
	WriteMultipleItems	Writes named items into an OPC server or OPC servers. Values, qualities and timestamps are written.
	WriteMultipleItemValues	Writes values into named items in an OPC server or OPC servers. Only the item values are written (qualities and timestamp are not written).

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Reference

_EasyDAClient Interface
OpcLabs.EasyOpc.DataAccess.ComTypes Namespace