将 CSV、TSV 和 TXT 转换为 Excel

使用 Aspose.Cells，您可以将 CSV 文件转换为 Excel、OpenOffice、Pdf、Json 和许多不同的格式。

打开 CSV 文件

逗号分隔值 (CSV) 文件包含值以逗号分隔的记录。数据存储为表格，其中每列由逗号分隔并由双引号引起来。如果字段值包含双引号字符，则使用一对双引号字符进行转义。也可以用Microsoft Excel导出电子表格数据到CSV。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Instantiate LoadOptions specified by the LoadFormat.
LoadOptions loadOptions4 = new LoadOptions(LoadFormat.Csv);

// Create a Workbook object and opening the file from its path
Workbook wbCSV = new Workbook(dataDir + "Book_CSV.csv", loadOptions4);
Console.WriteLine("CSV file opened successfully!");

打开 CSV 文件并替换无效字符

在 Excel 中，打开带有特殊字符的 CSV 文件时，会自动替换这些字符。 Aspose.Cells API 完成了同样的操作，在下面给出的代码示例中进行了演示。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
//Source directory
string sourceDir = RunExamples.Get_SourceDirectory();
            
var filename = sourceDir + "[20180220142533][ASPOSE_CELLS_TEST].csv";

//Load CSV file
var workbook = new Workbook(filename, new TxtLoadOptions() { Separator = ';', LoadFilter = new LoadFilter(LoadDataFilterOptions.CellData), CheckExcelRestriction = false, ConvertNumericData = false, ConvertDateTimeData = false });

Console.WriteLine(workbook.Worksheets[0].Name); // (20180220142533)(ASPOSE_CELLS_T
Console.WriteLine(workbook.Worksheets[0].Name.Length); // 31
Console.WriteLine("CSV file opened successfully!");

使用首选解析器

这并不总是需要使用默认解析器设置来打开 CSV 文件。有时导入 CSV 文件不会创建预期的输出，例如日期格式不符合预期或空字段的处理方式不同。以此目的TxtLoadOptions.PreferredParsers可根据需要提供自己的首选解析器来解析不同的数据类型。以下示例代码演示了首选解析器的用法。

可以从以下链接下载示例源文件和输出文件以测试此功能。

示例首选解析器.csv

outputsamplePreferredParser.xlsx

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
class TextParser : ICustomParser
{
    public object ParseObject(string value)
    {
        return value;
    }
    public string GetFormat()
    {
        return "";
    }
}

class DateParser : ICustomParser
{
    public object ParseObject(string value)
    {
        DateTime myDate = DateTime.ParseExact(value, "dd/MM/yyyy", System.Globalization.CultureInfo.InvariantCulture);
        return myDate;
    }
    public string GetFormat()
    {
        return "dd/MM/yyyy";
    }
}

public static void Main()
{
    // Initialize Text File's LoadFormat
    LoadFormat oLoadFormat = LoadFormat.Csv;

    // Initialize Text File's Load options
    TxtLoadOptions oTxtLoadOptions = new TxtLoadOptions(oLoadFormat);

    // Specify the separatot character
    oTxtLoadOptions.Separator = Convert.ToChar(",");

    // Specify the encoding scheme
    oTxtLoadOptions.Encoding = System.Text.Encoding.UTF8;

    // Set the flag to true for converting datetime data
    oTxtLoadOptions.ConvertDateTimeData = true;

    // Set the preferred parsers
    oTxtLoadOptions.PreferredParsers = new ICustomParser[] { new TextParser(), new DateParser() };

    // Initialize the workbook object by passing CSV file and text load options
    Workbook oExcelWorkBook = new Aspose.Cells.Workbook(sourceDir + "samplePreferredParser.csv", oTxtLoadOptions);

    // Get the first cell
    Cell oCell = oExcelWorkBook.Worksheets[0].Cells["A1"];

    // Display type of value
    Console.WriteLine("A1: " + oCell.Type.ToString() + " - " + oCell.DisplayStringValue);

    // Get the second cell
    oCell = oExcelWorkBook.Worksheets[0].Cells["B1"];

    // Display type of value
    Console.WriteLine("B1: " + oCell.Type.ToString() + " - " + oCell.DisplayStringValue);

    // Save the workbook to disc
    oExcelWorkBook.Save(outputDir + "outputsamplePreferredParser.xlsx");

    Console.WriteLine("OpeningCSVFilesWithPreferredParser executed successfully.\r\n");
}

使用自定义分隔符打开文本文件

文本文件用于保存不带格式的电子表格数据。该文件是一种纯文本文件，可以有一些自定义的分隔符。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
string filePath = dataDir + "Book11.csv";

// Instantiate Text File's LoadOptions
TxtLoadOptions txtLoadOptions = new TxtLoadOptions();

// Specify the separator
txtLoadOptions.Separator = Convert.ToChar(",");

// Specify the encoding type
txtLoadOptions.Encoding = System.Text.Encoding.UTF8;

// Create a Workbook object and opening the file from its path
Workbook wb = new Workbook(filePath, txtLoadOptions);

// Save file
wb.Save(dataDir+ "output.txt");

打开制表符分隔的文件

制表符分隔（文本）文件包含电子表格数据，但没有任何格式。数据以行和列的形式排列，就像在表格和电子表格中一样。基本上，制表符分隔文件是一种特殊的纯文本文件，每列之间有一个制表符。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
            
 // Opening Tab Delimited Files
// Instantiate LoadOptions specified by the LoadFormat.
LoadOptions loadOptions5 = new LoadOptions(LoadFormat.TabDelimited);

// Create a Workbook object and opening the file from its path
Workbook wbTabDelimited = new Workbook(dataDir + "Book1TabDelimited.txt", loadOptions5);
Console.WriteLine("Tab delimited file opened successfully!");

打开制表符分隔值 (TSV) 文件

制表符分隔值 (TSV) 文件包含电子表格数据，但没有任何格式。这与制表符分隔文件相同，其中数据按行和列排列，就像在表格和电子表格中一样。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
//Source directory
string sourceDir = RunExamples.Get_SourceDirectory();

// Instantiate LoadOptions specified by the LoadFormat.
LoadOptions loadOptions = new LoadOptions(LoadFormat.Tsv);

// Create a Workbook object and opening the file from its path
Workbook workbook = new Workbook(sourceDir + "SampleTSVFile.tsv", loadOptions);

// Using the Sheet 1 in Workbook
Worksheet worksheet = workbook.Worksheets[0];

// Accessing a cell using its name
Cell cell = worksheet.Cells["C3"];

Console.WriteLine("Cell Name: " + cell.Name + " Value: " + cell.StringValue);

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