Instruction Manual

Input Parameters For descriptions of the input parameters that you
must supply to the function, see
DataPointResetPriority on page 3-10.
Returns: The function returns a string containing the name of the data point reset by the
function.
3.6.4 Programming Samples
The following programming sample, written in Microsoft Visual Basic .NET, invokes all
three of the DataPoint functions. It uses the DataPointWrite function to write to the value of
a data point called NVL_nvo01Switch. It then uses DataPointResetPriority to reset the
priority level assigned to the data point, so that other applications can write to its value
later.
Once the data point has been updated, the DataPointRead function is called. Each property
included in the object returned by the function is then extracted and displayed in a text box.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e _
As System.EventArgs) Handles Button1.Click
'Create an instance of the i.LON 100 Web service, and return
'objects for the three functions to be called. The WSDL file
'defines a return type for DataPointRead and DataPointWrite. The
'DataPointResetPriority returns a string containing the name of the
'data point reset by the function.
Dim ilon As New WebReference1.iLON100()
Dim retRead As New WebReference1.DataPointReadReturnType()
Dim retWrite As New WebReference1.DataPointWriteReturnType()
Dim retPriority As String
'Create variables to store the input for each function.
Dim S As String
Dim pointName As String
Dim fieldName As String
Dim value As String
Dim propagate As String
Dim priority As String
'Specify the IP location of the i.LON 100 by replacing the default
' “localhost” with the IP address of the i.LON 100.
S = ilon.Url
ilon.Url = S.Replace("localhost", "10.5.0.50")
'Define the data point to be written to, and the value to assign
'it. In this case, the field name is left blank, as the data point
'the program is writing to is not a structure.
pointName = " NVL_nvo01Switch "
fieldName = ""
value = "0.0 0"
propagate = "1"
priority = "50"
i.LON 100 Internet Server Program3-12 mer’s Reference