Table Of Contents

Write to Text File (G Dataflow)

Version:
Last Modified: September 20, 2017

Writes a string or an array of strings as lines to a file.

Programming Patterns
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prompt

Custom message in the title bar of the file dialog box that appears when you do not wire a value to the input path.

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file path

The file to which you want to write data.

This input can be a reference to a file or an absolute file path. In both cases, the node creates the specified file if it does not already exist. The node opens the specified file without requiring you to call Open/Create/Replace File first.

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text

String or array of strings that this node writes to a file.

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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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refnum out

A reference to the file that this node uses.

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cancelled?

A Boolean value that indicates whether the user cancelled the dialog box that appears if no input file was wired to this node.

True The dialog box was cancelled.
False The dialog box was not cancelled, or the dialog box did not appear.
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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.

Adding End-of-Line Characters to an Array

This node appends platform-dependent, end-of-line (EOL) characters to the elements of an array even if you right-click the function and remove the checkmark next to the Convert EOL shortcut menu item.

Where Does This Node Start Writing?

If you wire a path to this node, the node opens or creates the file before writing to it and replaces any previous file contents. If you wire a reference to this node, the node begins writing at the current file position.

Permissions for Write to Text File

Use the Set File Position node if you need to perform random access file reads or writes.

Where This Node Can Run:

Desktop OS: Windows

FPGA: DAQExpress does not support FPGA devices

Web Server: Not supported in VIs that run in a web application


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