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如何將十進制數轉換為時間,反之亦然

[英]How to Convert decimal number to time or vice versa

這是一個例子

            if 8.30 is there it should be 8 hours 30 minute
            if 8 hour 20 minutes  then 8.20  

           Please tell whether it is possible ? if yes
           how ?      

當人們談論小時時,他們通常意味着0.1 = 6分鍾。

因此,轉換8.3的正確公式將是:

8小時+ 3 * 6分鍾= 8:18

要將8:20轉換為十進制,它將是:

8 + 20/6 = 8.333333(可能是8.3)

如果總是與之分開 你希望它顯示然后只需使用:

var ar="8.30".split(new[]{'.'});

Console.Write("{0} hours {1} minutes",ar[0], ar[1]);

PS:這里我們肯定有數組中的兩個元素,但請在使用ar[1]之前檢查數組ar長度

我的方法看起來像這樣。 (這是紅寶石所以你必須自己轉換它,但邏輯在這里很重要)

  def zeropad(number)
    return ((number.to_f < 10) ? "0" : "") + number.round.to_s
  end

  def decimal_to_time(value)
    t = value.split(".") #returns an array of ["hour", "minutes"]
    hours, minutes = t[0], t[1]
    minutes = zeropad( (minutes.to_f / 10**minutes.length) * 60 ) # parse the minutes into a time value
    return (minutes.to_i == 0) ? hours : hours + ":" + minutes
  end

  def findTime(value)
    value =~ /^\d+\.\d+/ ? decimal_to_time(value) : value
  end

findTime(“5.015”)為您提供適當的時間值。

我在以下測試中對此進行了測試,它們都通過了。

     | entered_time   | expected_results|
      | "5.6"         | "5:36"          |
      | "5.9"         | "5:54"          |
      | "5.09"        | "5:05"          |
      | "5.0"         | "5"          |
      | "5.00"        | "5"          |
      | "5.015"       | "5:01"          |
      | "6.03"        | "6:02"          |
      | "5.30"        | "5:18"          |
      | "4.2"         | "4:12"        |
      | "8.3"     | "8:18"           |
      | "8.33"    | "8:20"            |
      | "105.5"       | "105:30"        |
      | "16.7"        | "16:42"         |
      | "Abc"         | "Abc"           |
      | "5:36"    | "5:36"              | 
      | "5:44"    | "5:44"              |   

這里有幾個擴展方法(對於DateTime和Decimal)來完成這項工作:

public static class DecimalToTimeConverters
{
    public static DateTime ToDateTime(this decimal value)
    {
        string[] parts = value.ToString().Split(new char[] { '.' });

        int hours = Convert.ToInt32(parts[0]);
        int minutes = Convert.ToInt32(parts[1]);

        if ((hours > 23) || (hours < 0))
        {
            throw new ArgumentOutOfRangeException("value", "decimal value must be no greater than 23.59 and no less than 0");
        }
        if ((minutes > 59) || (minutes < 0))
        {
            throw new ArgumentOutOfRangeException("value", "decimal value must be no greater than 23.59 and no less than 0");
        }
        DateTime d = new DateTime(1, 1, 1, hours, minutes, 0);
        return d;
    }

    public static Decimal ToDecimal(this DateTime datetime)
    {
        Decimal d = new decimal();
        d = datetime.Hour;
        d = d + Convert.ToDecimal((datetime.Minute * 0.01));

        return d;
    }
}

我在一個新的空白頁面中使用以下內容在ASP.net網頁(我當時打開了一個Web項目)中非常快速地測試了這個,它看起來很有效:

protected void Page_Load(object sender, EventArgs e)
{
    Response.Clear();
    Decimal d = new decimal();
    d = 3.45M;
    Response.Write(d.ToDateTime().ToString());
    Response.Write("<br />");
    DateTime d2 = new DateTime(2009, 1, 1, 4, 55, 0);
    Response.Write(d2.ToDecimal().ToString());
}

按照Rob而不是替補

string[] parts = value.ToString().Split(new char[] { '.' }); 
int hours = Convert.ToInt32(parts[0]); 
int minutes = Convert.ToInt32(parts[1]); 

int hours = (int)value; 
int minutes = (int)((value - minutes) * 100); 

沒有字符串或依賴當前文化(假設'。'是小數點)

如何將txtDuration.Text值解析為十進制值?

if (txtDuration.Text)
{
    var duration = int.Parse(txtDuration.Text);
    var timespan = Boolean.Parse(hdfToggleDuration.Value) ? new TimeSpan (0, 0, duration, 0) : new TimeSpan (0, duration, 0, 0);
    DateTime end = start.Add(timespan);
}

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