Question

大家好我想把随机双重写入csv文件，因为现在我正在插入字符串，这就是我已经完成的工作。如何改变我的代码以便编写双打字符串非常感谢提前

public class CsvRow : List<string>
{
    public string LineText { get; set; }
}
/// <summary>
/// Class to write data to a CSV file
/// </summary>
public class CsvFileWriter : StreamWriter
{
    public CsvFileWriter(Stream stream)
        : base(stream)
    {
    }

    public CsvFileWriter(string filename)
        : base(filename)
    {
    }
    /// <summary>
    /// Writes a single row to a CSV file.
    /// </summary>
    /// <param name="row">The row to be written</param>
    public void WriteRow(CsvRow row)
    {
        StringBuilder builder = new StringBuilder();
        bool firstColumn = true;
        foreach (string value in row)
        {
            // Add separator if this isn't the first value
            if (!firstColumn)
                builder.Append(',');
            // Implement special handling for values that contain comma or quote
            // Enclose in quotes and double up any double quotes
            if (value.IndexOfAny(new char[] { '"', ',' }) != -1)
                builder.AppendFormat("\"{0}\"", value.Replace("\"", "\"\""));
            else
                builder.Append(value);
            firstColumn = false;
        }
        row.LineText = builder.ToString();
        WriteLine(row.LineText);
    }
}      static void WriteTest()
    {

        // Write sample data to CSV file
        using (CsvFileWriter writer = new CsvFileWriter("D://WriteTest.csv"))   CsvRow rowCol = new CsvRow();
            for (int j = 0; j < nbrCol; j++)

               rowCol.Add("Col" +j);

            writer.WriteRow(rowCol);
        {
            for (int i = 0; i < 100; i++)
            {
                CsvRow row = new CsvRow();
                for (int j = 0; j < 5; j++)
                    row.Add(String.Format("Column{0}", j));

                writer.WriteRow(row);
            }
        }
    }

Answer 1

就是这样：

    static void WriteTest()
    {
        // Write sample data to CSV file
        using (CsvFileWriter writer = new CsvFileWriter(@"E:\SharedDoc1\WriteTest.csv"))
        {
            Random rnd = new Random();

            for (int i = 0; i < 100; i++)
            {
                CsvRow row = new CsvRow();
                for (int j = 0; j < 5; j++)
                    row.Add(rnd.NextDouble().ToString("0.000000")); //round to 6 decimal digits

                writer.WriteRow(row);
            }
        }
    }

输出如下：

0.848731,0.525468,0.829536,0.397083,0.493102 0.398665,0.914157,0.768229,0.520031,0.249966 0.083535,0.409240,0.325824,0.177057,0.114989

请注意，rnd.NextDouble()会返回介于0和1之间的双精度数，如果您想要更大的数字，则应将其与您的因子相乘。例如，如果你想要双倍达到1000，请执行以下操作：

row.Add((rnd.NextDouble() * 1000).ToString("0.0#####"));

将数据写入csv文件

1 个答案: