Converti CSV, TSV e TXT in Excel con JavaScript tramite C++
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Usando Aspose.Cells, puoi convertire file CSV in Excel, OpenOffice, PDF, JSON e molti altri formati.
Apertura dei file CSV
I file di valori separati da virgola (CSV) contengono record in cui i valori sono separati da virgole. I dati sono memorizzati come una tabella in cui ciascuna colonna è separata dal carattere virgola e citata dal carattere virgoletta doppia. Se un valore di campo contiene un carattere di virgoletta doppia, viene eseguito l’escape con una coppia di caratteri virgoletta doppia. È anche possibile utilizzare Microsoft Excel per esportare i dati del foglio di calcolo in CSV.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Open CSV with Aspose.Cells (Browser)</h1>
<input type="file" id="fileInput" accept=".csv" />
<button id="runExample">Open CSV</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, LoadOptions, LoadFormat, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select a CSV file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiate LoadOptions specified by the LoadFormat (CSV)
const loadOptions4 = new LoadOptions(LoadFormat.Csv);
// Create a Workbook object and open the file from the uploaded file buffer
const wbCSV = new Workbook(new Uint8Array(arrayBuffer), loadOptions4);
document.getElementById('result').innerHTML = '<p style="color: green;">CSV file opened successfully!</p>';
document.getElementById('result').innerHTML += `<p>Worksheets count: ${wbCSV.worksheets.count}</p>`;
});
</script>
</html>
Apertura dei file CSV e sostituzione dei caratteri non validi
In Excel, quando si apre un file CSV con caratteri speciali, i caratteri vengono automaticamente sostituiti. Lo stesso viene fatto dall’API Aspose.Cells che è mostrata nell’esempio di codice qui sotto.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells CSV Load Example</title>
</head>
<body>
<h1>CSV Load Example</h1>
<input type="file" id="fileInput" accept=".csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, Worksheet, Cell, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select a CSV file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Configure TxtLoadOptions
const options = new AsposeCells.TxtLoadOptions();
options.separator = ",";
options.loadFilter = new AsposeCells.LoadFilter(AsposeCells.LoadDataFilterOptions.CellData);
options.checkExcelRestriction = false;
options.convertNumericData = false;
options.convertDateTimeData = false;
// Load CSV into a Workbook using the options
const workbook = new Workbook(new Uint8Array(arrayBuffer), options);
// Access first worksheet and its name
const worksheet = workbook.worksheets.get(0);
const sheetName = worksheet.name;
const nameLength = sheetName.length;
console.log(sheetName);
console.log(nameLength);
console.log("CSV file opened successfully!");
document.getElementById('result').innerHTML =
`<p>Worksheet name: ${sheetName}</p>` +
`<p>Name length: ${nameLength}</p>` +
`<p style="color: green;">CSV file opened successfully!</p>`;
});
</script>
</html>
Apertura dei file di testo con separatore personalizzato
I file di testo vengono utilizzati per contenere dati dei fogli elettronici senza formattazione. Il file è un tipo di file di testo semplice che può avere delimitatori personalizzati.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells CSV to Text Example</title>
</head>
<body>
<h1>CSV to Text Conversion Example</h1>
<input type="file" id="fileInput" accept=".csv,.txt" />
<button id="runExample">Convert and Download</button>
<a id="downloadLink" style="display: none;"></a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, TxtLoadOptions, EncodingType } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select a CSV file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiate Text File's LoadOptions
const txtLoadOptions = new TxtLoadOptions();
// Specify the separator
txtLoadOptions.separator = ",";
// Specify the encoding type
txtLoadOptions.encoding = EncodingType.UTF8;
// Create a Workbook object and open the file from the uploaded file's bytes
const wb = new Workbook(new Uint8Array(arrayBuffer), txtLoadOptions);
// Save file as CSV (download as .txt)
const outputData = wb.save(SaveFormat.Csv);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.txt';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Converted Text File';
document.getElementById('result').innerHTML = '<p style="color: green;">Conversion completed successfully! Click the download link to get the converted file.</p>';
});
</script>
</html>
Apertura dei file delimitati da tabulazione
I file delimitati da tabulazione (Testo) contengono dati di fogli di calcolo senza alcuna formattazione. I dati sono disposti in righe e colonne come in tabelle e fogli di calcolo. Fondamentalmente, un file delimitato da tabulazione è un tipo speciale di file di testo semplice con una tabulazione tra ogni colonna.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Tab Delimited Example</title>
</head>
<body>
<h1>Open Tab-Delimited File</h1>
<input type="file" id="fileInput" accept=".txt,.csv,.tsv,.xls,.xlsx" />
<button id="runExample">Open Tab Delimited</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, LoadOptions, LoadFormat, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select a tab-delimited text file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiate LoadOptions specified by the LoadFormat (TabDelimited)
const loadOptions = new LoadOptions(LoadFormat.TabDelimited);
// Create a Workbook object and open the file from the uploaded data using LoadOptions
const wbTabDelimited = new Workbook(new Uint8Array(arrayBuffer), loadOptions);
document.getElementById('result').innerHTML = '<p style="color: green;">Tab delimited file opened successfully!</p>';
// Save the workbook to XLSX and provide a download link
const outputData = wbTabDelimited.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
});
</script>
</html>
Apertura dei file di valori separati da tabulazione (TSV)
I file di valori separati da tab (TSV) contengono dati di fogli di calcolo senza formattazione. È uguale a un file Tab Delimited dove i dati sono disposti in righe e colonne come nelle tabelle e nei fogli di calcolo.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells TSV Read Example</title>
</head>
<body>
<h1>Read TSV Cell Example</h1>
<input type="file" id="fileInput" accept=".tsv,.txt" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, LoadOptions, LoadFormat, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select a TSV file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiate LoadOptions with TSV format
const loadOptions = new LoadOptions(LoadFormat.Tsv);
// Create Workbook from uploaded file with loadOptions
const workbook = new Workbook(new Uint8Array(arrayBuffer), loadOptions);
// Using the first sheet in the workbook
const worksheet = workbook.worksheets.get(0);
// Accessing a cell using its name
const cell = worksheet.cells.get("C3");
const outputText = `Cell Name: ${cell.name} Value: ${cell.stringValue}`;
console.log(outputText);
document.getElementById('result').innerHTML = `<p style="color: green;">${outputText}</p>`;
});
</script>
</html>