IUANode.ChildrenRemoteRead(childVariables, timeoutMilliseconds)

Returns a list of all the variables of interest children of the node on which it invokes. The optional argument sets the timeout period.
IEnumerable<RemoteChildVariableValue> ChildrenRemoteRead(IEnumerable<RemoteChildVariable> 
childVariables
, double 
timeoutMilliseconds
);

Arguments

childVariables
 (IEnumerable<RemoteChildVariable>)
The list of the variables of interest, expressed as relative paths inside the node on which the API is invoked.
timeoutMilliseconds
 (double)
The timeout period, expressed in milliseconds, after which the API throws an exception.
TIP: If not specified, the default value of the argument is
30000
 (30 seconds).

Returns

IEnumerable<RemoteChildVariableValue>
The list of variables of interest, expressed as a pair of the
RemoteChildVariableValue
 class following properties:
RelativePath
 (string)
The path relative to the variable inside the node.
Value
 (UAValue)
The value of the variable.

Example

The following example shows an API that returns a
reads
 list that contains the variables of interest contained in the
myNode
 node. The two variables of interest were added in the
myVariables
 list: one directly the child of the node (
Tag1
) and the other inside a child node (
NestedStructure/Tag2
).
If the API returns an error or if the set timeout time is reached, the code in the following example generates an error message composed of
ChildrenRemoteRead failed:
 and an expected error code for the API.
var myVariables = new List<RemoteChildVariable>()
{
    new RemoteChildVariable("Tag1"),
    new RemoteChildVariable("NestedStructure/Tag2")
};
var myNode = Project.Current.Get("CommDrivers/Driver1/Station1/Tags/TagStructure1");
try
{
    var reads = myNode.ChildrenRemoteRead(myVariables);
}
catch (Exception ex)
{
    Log.Error("ChildrenRemoteRead failed: " + ex.ToString());
}
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