Table Of Contents

Read Key (Read Key) (G Dataflow)

Last Modified: March 30, 2017

Reads a value associated with a key in a specified section from the specified configuration data.

If the key does not exist, the node returns the default value. This node supports multibyte characters in strings.

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section

Name of the section from which to read the specified key.

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reference in

Reference to the configuration data.

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key

Name of the key to read.

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default value

Value to return if the node does not find the key in the specified section or if an error occurs.

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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reference out

Reference to the configuration data.

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found

Boolean value that indicates whether this node found the key in the specified section.

True Found the key in the specified section.
False Did not find the key in the specified section.
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value

Is the value of the key.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices


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