EXAMPLE: You want to output data from the first input pin to the second worksheet, and you want to output data from the second input pin to the first worksheet:. Caution: If you are exporting data from multiple inputs to a single worksheet, configure the OutputSpec property to ensure that the data does not overlap in the output. See the following example for more information. In this example, data from both the first and second input pins is output to the second worksheet, where the data from input 1 is output to the first 3 columns and the data from input 2 is output to the fourth, fifth and sixth columns in this case, both input data sets consist of three columns of data :.
See also Output Excel. Note: If required, you can allocate more memory to this node by increasing the maximum heap size of the JVM instance that runs the node. For more information, see Increasing the heap space for Java-based nodes. Click the folder icon and browse to the Excel file to which you want to export the data, then click Choose. To create a new file, click the folder icon and navigate to the folder where you want to output the file, then enter a name for the file in the Filename field and click Choose.
Note: If you are using the server edition, the output file will be created on the Data Analyze server. If you wish to open the file, and you don't have access to the file system on the server, you will need to download the file onto your local machine. Please see the topic Downloading data from the server for more details.
Optionally specify whether to preserve existing Excel styles. If this property is set to true, and the FormatOutput property is also set to true, this ensures that the data is output in a format which matches the field type, while maintaining cell formatting and styling in an existing cell. Optionally click the folder icon and browse to an existing, formatted Excel file to use as a template.
This file will not be overwritten, but existing data, charts, images, formulas and so on, will be extracted and written to the new output file. To define which input pin is written to which Excel worksheet, and where within the worksheet the data is to be output, add XML code to the optional OutputSpec property. To prevent such attacks, this node is configured to error if it detects that the file is decompressing to a much larger size than the compressed version.
This can lead to false positives where non-malicious files are detected to contain zip bombs simply due to the way that they are decompressed. If you receive such errors while attempting to process an Excel file that you know is from a trusted source and cannot contain a zip bomb, set this property to True which will inform the node that the file is safe to process.
A number of sample Data Flows are available from the Samples workspace, found in the Analyze Directory page. Note: Upgrades will overwrite all data flows in the workspace. If you want to make changes to one of the sample data flows, we recommend you create a copy and save it elsewhere, using Save as You are here:. Output Excel Outputs data to one or more worksheets within an Excel workbook. In this topic: Formatting the output Using an existing Excel file as a template Configuring the output of specific worksheets Formatting the output You can configure the following optional properties to modify the formatting of the output: HeaderBold - By default, the header row in the output Excel will be displayed in bold text.
Most operating systems have restrictions on which characters can be used in filenames. Because some operating systems do not allow spaces, we suggest that you use the underscore where needed for spacing in a filename. Path Filespec — The location of a file along with its filename. Filespec is short for file specification. Most operating systems have a set of rules on how to specify the drive and directory or path through several directory levels along with the filename.
Because some operating systems do not allow spaces, we suggest that you use the underscore where needed when creating folders or sub-directories. Open — Your program requesting the operating system to let it have access to an existing file or to open a new file. In most current programming languages, a file data type exists and is used for file processing. A file variable will be used to store the device token that the operating system assigns to the file being opened.
An open function or method is used to retrieve the device token, and typically requires at least two parameters: the path and the mode read, write, append, or a combination thereof.
Corresponding pseudocode would be:. The open function provides a return value of a device token from the operating system and it is stored in the variable named data. It is considered good programming practice to determine if the file was opened properly. Accessing files stored on a network or the Internet may fail due to a network error.
Verifying that a file was opened properly is processed with a condition control structure. Opening the file for both input and output allows one to do that without closing and re-opening. Using ofstream with std::in doesn't make any sense. Are there reads performed on the stream?
If not, perhaps the code when originally written used an fstream , which was later changed to an ofstream. It's the kind of thing that can creep into a code base that's in maintenance mode.
Since you're using an ofstream , none of the input functions are available to you on the stream. Then opening the file in read-write mode isn't harmful, but it is pointless unless you're going to start hacking about with the underlying stream. This means nothing for the actual streams. How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What does it mean to open an output file as both input and output? Ask Question. Asked 7 years, 10 months ago.
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