The following tables list the members exposed by OpcXmlDA.
Public Constructors
| Name | Description | |
|---|---|---|
 | OpcXmlDA Constructor |
Public Fields
| Name | Description | |
|---|---|---|
 | RingBufferSize | Subscription ring-buffer size in the internal OPC-DA gateway. |
| Url | URL of the XML-DA serverice or ProgID of the OPC-DA server. |
Public Properties
| Name | Description | |
|---|---|---|
 | Credentials | Credentials for the server access |
 | EndPointConfiguration | Get the Endpoints defined in the WCF Application Configuration. This static property exists only in the XmlDaNetWCF.DLL. |
| EndPointName | WCF endpoint to be used in the server access. The name must be defiend in the WCF Configuration. The default value is "basicHTTP". This property exists only in the XmlDaNetWCF.DLL |
| OpcDaDisconnectIdleTime | Idle time in seconds. The OPC-DA server is disconnected when there is no client acivity for this time. The default is 20 seconds. This property is used only for OPC-DA server access. |
| OpcDaReadFromDevice | Force all reads made from the device |
| OpcDaWaitAfterAddItems | Delay in milliseconds after AddItems to an OPC server group. Some servers need time before a read/write operation can be executed. |
| OpcDaWaitAfterConnect | Delay in milliseconds after a connect to an OPC DA server. Somer servers need time to be ready for client calls. |
| Proxy | Proxy access for the Web access |
| ReadWriteTimeout | Read/Write timeout in ms |
| Timeout | Client wait timeout in ms |
| UserAgent | User agent header sent with each request |
Public Methods
| Name | Description | |
|---|---|---|
 | BeginBrowse | XML-DA method to asynchronously browse an XML-DA or OPC-DA server. |
| BeginGetProperties | XML-DA method to asynchronously get item properties from an XML-DA or OPC-DA server. |
| BeginGetStatus | XML-DA method to asynchronously read the current XML-DA or OPC-DA server status. The purpose of the GetStatus service is: - It provides a common mechanism for checking the status of the server - whether it is operational or in need of maintenance. - It provides a common mechanism for obtaining vendor-specific information about the server that is not available through the other OPC services (version number, etc). - Provides insight for clients as to the relative time synchronization between the client and server. As an example, this information is useful for Read requests. |
| BeginRead | XML-DA method to asynchronously read a set of item values from an XML-DA or OPC-DA server. |
| BeginSubscribe | XML-DA method to asynchronously subscribe a set of item values with either an XML-DA or OPC-DA server. |
| BeginSubscriptionCancel | XML-DA method to asynchronously cancel a subscription with either an XML-DA or OPC-DA server. |
| BeginSubscriptionPolledRefresh | XML-DA method to asynchronously poll subscribed items from either an XML-DA or OPC-DA server. |
| BeginWrite | XML-DA method to asynchronously write a set of item values to either an XML-DA or OPC-DA server. |
| Browse | XML-DA method to browse an XML-DA or OPC-DA server. |
| Dispose | |
| EndBrowse | XML-DA method to asynchronously browse an XML-DA or OPC-DA server. |
| EndGetProperties | XML-DA method to asynchronously get item properties from an XML-DA or OPC-DA server. |
| EndGetStatus | XML-DA method to asynchronously read the current XML-DA or OPC-DA server status. The purpose of the GetStatus service is: - It provides a common mechanism for checking the status of the server - whether it is operational or in need of maintenance. - It provides a common mechanism for obtaining vendor-specific information about the server that is not available through the other OPC services (version number, etc). - Provides insight for clients as to the relative time synchronization between the client and server. As an example, this information is useful for Read requests. |
| EndRead | XML-DA method to asynchronously read a set of item values from an XML-DA or OPC-DA server. |
| EndSubscribe | XML-DA method to asynchronously subscribe a set of item values with either an XML-DA or OPC-DA server. |
| EndSubscriptionCancel | XML-DA method to asynchronously cancel a subscription with either an XML-DA or OPC-DA server. |
| EndSubscriptionPolledRefresh | XML-DA method to asynchronously poll subscribed items from either an XML-DA or OPC-DA server. |
| EndWrite | XML-DA method to asynchronously write a set of item values to either an XML-DA or OPC-DA server. |
| GetProperties | XML-DA method to get item properties for a set of items from an XML-DA or OPC-DA server. |
| GetStatus | XML-DA method to get the current XML-DA or OPC-DA server status. The purpose of the GetStatus service is: - It provides a common mechanism for checking the status of the server - whether it is operational or in need of maintenance. - It provides a common mechanism for obtaining vendor-specific information about the server that is not available through the other OPC services (version number, etc). - Provides insight for clients as to the relative time synchronization between the client and server. As an example, this information is useful for Read requests. |
| Read | XML-DA method to read a set of item values from an XML-DA or OPC-DA server. |
| Subscribe | XML-DA method to subscribe a set of item values with either an XML-DA or OPC-DA server. |
| SubscriptionCancel | XML-DA method to cancel a subscription with either an XML-DA or OPC-DA server. |
| SubscriptionPolledRefresh | XML-DA method to poll subscribed items from either an XML-DA or OPC-DA server. |
| Write | XML-DA method to write a set of item values to either an XML-DA or OPC-DA server. |