如何為C＃控制台數組增加時間

Question

我想知道如何將文件名放入數組並將文件名加載到CSV文件。 例如，這是文件名File_1_20170428101607。 我希望將文件名（日期和時間格式– 28/04/2017 10:16:07）解析為輸出文件（csv文件）中的一列。 這是時間代碼，您能檢查一下如何將時間解析為csv文件嗎？

private static string[] GetFileNames(string path, string filter)
{
    string fileName = @”C:\\Desktop\\File_1_20170428101607.csv”;

    string result;

    result = Path.GetFileName(fileName);
    Console.WriteLine(“GetFileName(‘{0}’) returns ‘{1}'”,
    fileName, result);

    string[] files = Directory.GetFiles(path, filter);
    for (int i = 0; i parsing was not possible -> return null
    {
        return null;
    }
}

     private static DateTime? ParseDateFromFilename(string filename)
    {
        //regex is used to extract the 14 digit timestamp from filename
        var timestamp = Regex.Match(filename, @"\d{14}$");
        if (!timestamp.Success)
        {
            //if no match was found return null
            return null;
        }

        try
        {
            //try to parse the date with known timestamp and return
            return DateTime.ParseExact(timestamp.Value, "yyyyMMddHHmmss", CultureInfo.InvariantCulture);
        }
        catch
        {
            //any error -> parsing was not possible -> return null
            return null;

        }

Answer 1

您可以嘗試以下方法：

首先創建一個將包含csv內容的StringBuilder ：

StringBuilder csv = new StringBuilder();
string filePath = "...";

接下來創建一個for loop並獲取兩列的值，並將其附加到StringBuilder

//for loop start

string fileName = "File_1_20170428101607";
string datePart = fileName.Split('_').Last();
DateTime dt = DateTime.ParseExact(datePart, "yyyyMMddhhmmss", null);
string dateString = dt.ToString("dd/mm/yyyy hh:MM:ss", System.Globalization.CultureInfo.InvariantCulture);

var firstColVal = fileName;
var secondColVal = dateString;

var newLine = string.Format("{0},{1}", firstColVal, secondColVal);
csv.AppendLine(newLine);

//loop end

在for loop之后for loop將StringBuilder內容保存到您的csv文件中：

File.WriteAllText(filePath, csv.ToString());