URL Property
Syntax
CWDataSocket.URL
Data Type
Purpose
Specifies the location expressed as a URL of the data source or target to which the CWDataSocket is connecting.
Remarks
Use the ConnectTo method to set the URL as you connect.
The CWDataSocket can connect to different data sources or targets according the URL specified. The AccessMode property determines if the CWDataSocket is reading a data source or writing to a data target.
If the data source or target pointed to by the URL redirects the CWDataSocket to a new URL, the ActualURL property is set to the new URL.
The following types of URLs are supported:
| Protocol | Examples |
|---|---|
| DataSocket Server ("dstp:") | dstp://localhost/wave |
| dstp://machine/item | |
| Standard Web Server ("http:") | http://www.ni.com/cworks/datasocket/tone.wav |
| Standard FTP Sites ("ftp:") | ftp://ftp.ni.com/datasocket/ping.wav |
| The ftp site should allow anonymous connections. | |
| Lookout/Logos objects ("lookout:" or "logos:") | lookout://localhost/testprocess/pot1.value |
| logos://localhost/testprocess/pot1.value | |
| Files directly accessible from your file system ("file:") | file:ping.wav |
| file:c:/mydata/ping.wav | |
| file://machine/mydata/ping.wav | |
| OLE for Process Control (OPC) Servers ("opc:") | opc:/National Instruments.OPCDemo/sine |
| opc:/National Instruments.OPCDemo/sine?Accesspath=sine | |
| opc://machine/National Instruments.OPCModbus/Modbus Demo Box.4:0 | |
| opc://machine/National Instruments.OPCModbus/Modbus Demo Box.4:0?updaterate=100&deadband;=0.7 |
Example
'Set the AccessMode and URL properties and connect
'to a data source.
CWDataSocket1.AccessMode = cwdsRead
CWDataSocket1.URL = "http://myhost/pata_path"
CWDataSocket1.Connect
'The AccessMode and URL also can be set with ConnectTo.
CWDataSocket1.ConnectTo "http://myhost/pata_path", cwdsRead