| 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 named items from an OPC server or OPC servers. Only the item values are returned (qualities and timestamps are not returned). 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 named items from an OPC server or OPC servers. Only the item values are returned (qualities and timestamps are not returned). 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 | Subscribes to the specified OPC-DA item, and monitors its data until it has "good" quality, an error occurs, or the alloted time elapses. |
| WaitForMultipleItemValueList | Subscribes to the specified OPC-DA items, and monitors their data until they have at least the quality specified for each item, an error occurs, or the alloted time elapses. |
| WaitForMultipleItemValues | Subscribes to the specified OPC-DA items, and monitors their data until they have at least the quality specified for each item, an error occurs, or the alloted time elapses. |
| 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). |
OPC Studio User's Guide and Reference
_EasyDAClient Interface Methods