Convert CSV, TSV and TXT to Excel with Node.js via C++
Opening CSV Files
Comma Separated Values (CSV) files contain records where the values are separated by commas. Data is stored as a table where each column is separated by the comma character and quoted by the double quote character. If a field value contains a double quote character it is escaped with a pair of double quote characters. You can also use Microsoft Excel to export spreadsheet data to CSV.
const path = require("path");
const AsposeCells = require("aspose.cells.node");
// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
// Instantiate LoadOptions specified by the LoadFormat.
const loadOptions4 = new AsposeCells.LoadOptions(AsposeCells.LoadFormat.Csv);
// Create a Workbook object and opening the file from its path
const wbCSV = new AsposeCells.Workbook(path.join(dataDir, "Book_CSV.csv"), loadOptions4);
console.log("CSV file opened successfully!");
Opening CSV files and replacing invalid characters
In Excel, when a CSV file with special characters is opened, the characters are automatically replaced. The same is done by the Aspose.Cells API which is demonstrated in the code example given below.
const path = require("path");
const AsposeCells = require("aspose.cells.node");
// Source directory
const sourceDir = path.join(__dirname, "data");
const filePath = path.join(sourceDir, "[20180220142533][ASPOSE_CELLS_TEST].csv");
const options = new AsposeCells.TxtLoadOptions();
options.setSeparator(",");
options.setLoadFilter(new AsposeCells.LoadFilter(AsposeCells.LoadDataFilterOptions.CellData));
options.setCheckExcelRestriction(false);
options.setConvertNumericData(false);
options.setConvertDateTimeData(false);
// Load CSV file
const workbook = new AsposeCells.Workbook(filePath, options);
console.log(workbook.getWorksheets().get(0).getName()); // (20180220142533)(ASPOSE_CELLS_T
console.log(workbook.getWorksheets().get(0).getName().length); // 31
console.log("CSV file opened successfully!");
Opening Text Files with Custom Separator
Text files are used to hold spreadsheet data without formatting. The file is a kind of plain text file that can have some customized delimiters.
const path = require("path");
const AsposeCells = require("aspose.cells.node");
// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
const filePath = path.join(dataDir, "Book11.csv");
// Instantiate Text File's LoadOptions
const txtLoadOptions = new AsposeCells.TxtLoadOptions();
// Specify the separator
txtLoadOptions.setSeparator(",");
// Specify the encoding type
txtLoadOptions.setEncoding(AsposeCells.EncodingType.UTF8);
// Create a Workbook object and opening the file from its path
const wb = new AsposeCells.Workbook(filePath, txtLoadOptions);
// Save file
wb.save(path.join(dataDir, "output.txt"));
Opening Tab Delimited Files
Tab delimited (Text) files contain spreadsheet data but without any formatting. Data is arranged in rows and columns like in tables and spreadsheets. Basically, a tab delimited file is a special kind of plain text file with a tab between each column.
const path = require("path");
const AsposeCells = require("aspose.cells.node");
// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
// Opening Tab Delimited Files
// Instantiate LoadOptions specified by the LoadFormat.
const loadOptions5 = new AsposeCells.LoadOptions(AsposeCells.LoadFormat.TabDelimited);
// Create a Workbook object and opening the file from its path
const wbTabDelimited = new AsposeCells.Workbook(path.join(dataDir, "Book1TabDelimited.txt"), loadOptions5);
console.log("Tab delimited file opened successfully!");
Opening Tab-Separated Values (TSV) Files
Tab-separated values (TSV) files contain spreadsheet data but without any formatting. It is the same as a Tab Delimited file where data is arranged in rows and columns like in tables and spreadsheets.
const path = require("path");
const AsposeCells = require("aspose.cells.node");
// Source directory
const sourceDir = path.join(__dirname, "data");
// Instantiate LoadOptions specified by the LoadFormat.
const loadOptions = new AsposeCells.LoadOptions(AsposeCells.LoadFormat.Tsv);
// Create a Workbook object and opening the file from its path
const workbook = new AsposeCells.Workbook(path.join(sourceDir, "SampleTSVFile.tsv"), loadOptions);
// Using the Sheet 1 in Workbook
const worksheet = workbook.getWorksheets().get(0);
// Accessing a cell using its name
const cell = worksheet.getCells().get("C3");
console.log("Cell Name: " + cell.getName() + " Value: " + cell.getStringValue());