.NET是否提供了将字节转换为KB，MB，GB等的简单方法？

时间：2013-01-23 20:29:53

标签： c# .net byte megabyte

只是想知道.NET是否提供了一种干净的方法来执行此操作：

int64 x = 1000000;
string y = null;
if (x / 1024 == 0) {
    y = x + " bytes";
}
else if (x / (1024 * 1024) == 0) {
    y = string.Format("{0:n1} KB", x / 1024f);
}

等...

25 个答案:

答案 0 :(得分：163)

这是一个相当简洁的方法：

static readonly string[] SizeSuffixes = 
                   { "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
static string SizeSuffix(Int64 value, int decimalPlaces = 1)
{
    if (decimalPlaces < 0) { throw new ArgumentOutOfRangeException("decimalPlaces"); }
    if (value < 0) { return "-" + SizeSuffix(-value); } 
    if (value == 0) { return string.Format("{0:n" + decimalPlaces + "} bytes", 0); }

    // mag is 0 for bytes, 1 for KB, 2, for MB, etc.
    int mag = (int)Math.Log(value, 1024);

    // 1L << (mag * 10) == 2 ^ (10 * mag) 
    // [i.e. the number of bytes in the unit corresponding to mag]
    decimal adjustedSize = (decimal)value / (1L << (mag * 10));

    // make adjustment when the value is large enough that
    // it would round up to 1000 or more
    if (Math.Round(adjustedSize, decimalPlaces) >= 1000)
    {
        mag += 1;
        adjustedSize /= 1024;
    }

    return string.Format("{0:n" + decimalPlaces + "} {1}", 
        adjustedSize, 
        SizeSuffixes[mag]);
}

这是我建议的原始实现，可能稍微慢一些，但更容易理解：

static readonly string[] SizeSuffixes = 
                  { "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };

static string SizeSuffix(Int64 value, int decimalPlaces = 1)
{
    if (value < 0) { return "-" + SizeSuffix(-value); } 

    int i = 0;
    decimal dValue = (decimal)value;
    while (Math.Round(dValue, decimalPlaces) >= 1000)
    {
        dValue /= 1024;
        i++;
    }

    return string.Format("{0:n" + decimalPlaces + "} {1}", dValue, SizeSuffixes[i]);
}

Console.WriteLine(SizeSuffix(100005000L));

答案 1 :(得分：68)

结帐ByteSize库。它是System.TimeSpan的字节！

它为您处理转换和格式化。

var maxFileSize = ByteSize.FromKiloBytes(10);
maxFileSize.Bytes;
maxFileSize.MegaBytes;
maxFileSize.GigaBytes;

它还进行字符串表示和解析。

// ToString
ByteSize.FromKiloBytes(1024).ToString(); // 1 MB
ByteSize.FromGigabytes(.5).ToString();   // 512 MB
ByteSize.FromGigabytes(1024).ToString(); // 1 TB

// Parsing
ByteSize.Parse("5b");
ByteSize.Parse("1.55B");

答案 2 :(得分：34)

由于其他人都在发布他们的方法，我想我会发布我通常用于此的扩展方法：

编辑：添加了int / long变体......并修复了copypasta拼写错误... 

public static class Ext
{
    private const long OneKb = 1024;
    private const long OneMb = OneKb * 1024;
    private const long OneGb = OneMb * 1024;
    private const long OneTb = OneGb * 1024;

    public static string ToPrettySize(this int value, int decimalPlaces = 0)
    {
        return ((long)value).ToPrettySize(decimalPlaces);
    }

    public static string ToPrettySize(this long value, int decimalPlaces = 0)
    {
        var asTb = Math.Round((double)value / OneTb, decimalPlaces);
        var asGb = Math.Round((double)value / OneGb, decimalPlaces);
        var asMb = Math.Round((double)value / OneMb, decimalPlaces);
        var asKb = Math.Round((double)value / OneKb, decimalPlaces);
        string chosenValue = asTb > 1 ? string.Format("{0}Tb",asTb)
            : asGb > 1 ? string.Format("{0}Gb",asGb)
            : asMb > 1 ? string.Format("{0}Mb",asMb)
            : asKb > 1 ? string.Format("{0}Kb",asKb)
            : string.Format("{0}B", Math.Round((double)value, decimalPlaces));
        return chosenValue;
    }
}

答案 3 :(得分：24)

我会使用Extension methods，Math.Pow函数和Enums来解决它：

public static class MyExtension
{
    public enum SizeUnits
    {
        Byte, KB, MB, GB, TB, PB, EB, ZB, YB
    }

    public static string ToSize(this Int64 value, SizeUnits unit)
    {
        return (value / (double)Math.Pow(1024, (Int64)unit)).ToString("0.00");
    }
}

并使用它：

string h = x.ToSize(MyExtension.SizeUnits.KB);

答案 4 :(得分：5)

我知道这已经是旧线程了。但也许有人会寻找解决方案。 这就是我使用的和最简单的方法

public static string FormatFileSize(long bytes)
{
    var unit = 1024;
    if (bytes < unit) { return $"{bytes} B"; }

    var exp = (int)(Math.Log(bytes) / Math.Log(unit));
    return $"{bytes / Math.Pow(unit, exp):F2} {("KMGTPE")[exp - 1]}B";
}

获取文件夹大小（例如用法）

public static long GetFolderSize(string path, string ext, bool AllDir)
{
    var option = AllDir ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
    return new DirectoryInfo(path).EnumerateFiles("*" + ext, option).Sum(file => file.Length);
}

示例用法：

public static void TEST()
{
    string folder = @"C:\Users\User\Videos";

    var bytes = GetFolderSize(folder, "mp4", true); //or GetFolderSize(folder, "mp4", false) to get all single folder only
    var totalFileSize = FormatFileSize(bytes);
    Console.WriteLine(totalFileSize);
}

答案 5 :(得分：5)

这是一个比你更容易扩展的选项，但不是，库本身没有内置。

private static List<string> suffixes = new List<string> { " B", " KB", " MB", " GB", " TB", " PB" };
public static string Foo(int number)
{
    for (int i = 0; i < suffixes.Count; i++)
    {
        int temp = number / (int)Math.Pow(1024, i + 1);
        if (temp == 0)
            return (number / (int)Math.Pow(1024, i)) + suffixes[i];
    }
    return number.ToString();
}

答案 6 :(得分：5)

没有。主要是因为它具有相当小的需求，并且存在太多可能的变化。 （它是“KB”，“Kb”还是“Ko”？是兆字节1024 * 1024字节，还是1024 * 1000字节？ - 是的，有些地方使用它！）

答案 7 :(得分：4)

投票最多的答案的简短版本存在TB值问题。

我适当地调整它以处理tb值并且仍然没有循环并且还添加了一些错误检查负值。这是我的解决方案：

static readonly string[] SizeSuffixes = { "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
static string SizeSuffix(long value, int decimalPlaces = 0)
{
    if (value < 0)
    {
        throw new ArgumentException("Bytes should not be negative", "value");
    }
    var mag = (int)Math.Max(0, Math.Log(value, 1024));
    var adjustedSize = Math.Round(value / Math.Pow(1024, mag), decimalPlaces);
    return String.Format("{0} {1}", adjustedSize, SizeSuffixes[mag]);
}

答案 8 :(得分：3)

基于NeverHopeless的优雅解决方案：

private static readonly KeyValuePair<long, string>[] Thresholds = 
{
    // new KeyValuePair<long, string>(0, " Bytes"), // Don't devide by Zero!
    new KeyValuePair<long, string>(1, " Byte"),
    new KeyValuePair<long, string>(2, " Bytes"),
    new KeyValuePair<long, string>(1024, " KB"),
    new KeyValuePair<long, string>(1048576, " MB"), // Note: 1024 ^ 2 = 1026 (xor operator)
    new KeyValuePair<long, string>(1073741824, " GB"),
    new KeyValuePair<long, string>(1099511627776, " TB"),
    new KeyValuePair<long, string>(1125899906842620, " PB"),
    new KeyValuePair<long, string>(1152921504606850000, " EB"),

    // These don't fit into a int64
    // new KeyValuePair<long, string>(1180591620717410000000, " ZB"), 
    // new KeyValuePair<long, string>(1208925819614630000000000, " YB") 
};

/// <summary>
/// Returns x Bytes, kB, Mb, etc... 
/// </summary>
public static string ToByteSize(this long value)
{
    if (value == 0) return "0 Bytes"; // zero is plural
    for (int t = Thresholds.Length - 1; t > 0; t--)
        if (value >= Thresholds[t].Key) return ((double)value / Thresholds[t].Key).ToString("0.00") + Thresholds[t].Value;
    return "-" + ToByteSize(-value); // negative bytes (common case optimised to the end of this routine)
}

也许有过多的评论，但我倾向于留下它们以防止自己在未来的访问中犯同样的错误......

答案 9 :(得分：3)

    private string GetFileSize(double byteCount)
    {
        string size = "0 Bytes";
        if (byteCount >= 1073741824.0)
            size = String.Format("{0:##.##}", byteCount / 1073741824.0) + " GB";
        else if (byteCount >= 1048576.0)
            size = String.Format("{0:##.##}", byteCount / 1048576.0) + " MB";
        else if (byteCount >= 1024.0)
            size = String.Format("{0:##.##}", byteCount / 1024.0) + " KB";
        else if (byteCount > 0 && byteCount < 1024.0)
            size = byteCount.ToString() + " Bytes";

        return size;
    }

    private void btnBrowse_Click(object sender, EventArgs e)
    {
        if (openFile1.ShowDialog() == DialogResult.OK)
        {
            FileInfo thisFile = new FileInfo(openFile1.FileName);

            string info = "";

            info += "File: " + Path.GetFileName(openFile1.FileName);
            info += Environment.NewLine;
            info += "File Size: " + GetFileSize((int)thisFile.Length);

            label1.Text = info;
        }
    }

这也是一种方法（数字1073741824.0来自1024 * 1024 * 1024又称GB）

答案 10 :(得分：1)

我已将这里的一些答案合并为两种效果很好的方法。下面的第二种方法将字节字符串（如1.5.1 GB）转换回字节（如1621350140）作为long类型值。我希望这对寻求将字节转换为字符串并返回字节的解决方案的其他人有用。

public static string BytesAsString(float bytes)
{
    string[] suffix = { "B", "KB", "MB", "GB", "TB" };
    int i;
    double doubleBytes = 0;

    for (i = 0; (int)(bytes / 1024) > 0; i++, bytes /= 1024)
    {
        doubleBytes = bytes / 1024.0;
    }

    return string.Format("{0:0.00} {1}", doubleBytes, suffix[i]);
}

public static long StringAsBytes(string bytesString)
{
    if (string.IsNullOrEmpty(bytesString))
    {
        return 0;
    }

    const long OneKb = 1024;
    const long OneMb = OneKb * 1024;
    const long OneGb = OneMb * 1024;
    const long OneTb = OneGb * 1024;
    double returnValue;
    string suffix = string.Empty;

    if (bytesString.IndexOf(" ") > 0)
    {
        returnValue = float.Parse(bytesString.Substring(0, bytesString.IndexOf(" ")));
        suffix = bytesString.Substring(bytesString.IndexOf(" ") + 1).ToUpperInvariant();
    }
    else
    {
        returnValue = float.Parse(bytesString.Substring(0, bytesString.Length - 2));
        suffix = bytesString.ToUpperInvariant().Substring(bytesString.Length - 2);
    }

    switch (suffix)
    {
        case "KB":
            {
                returnValue *= OneKb;
                break;
            }

        case "MB":
            {
                returnValue *= OneMb;
                break;
            }

        case "GB":
            {
                returnValue *= OneGb;
                break;
            }

        case "TB":
            {
                returnValue *= OneTb;
                break;
            }

        default:
            {
                break;
            }
    }

    return Convert.ToInt64(returnValue);
}

答案 11 :(得分：0)

string Convert(float bytes)
{
    string[] Group = { "Bytes", "KB", "MB", "GB", "TB"};
    float B = bytes; int G = 0;
    while (B >= 1024 && G < 5)
    {
        B /= 1024;
        G += 1;
    }
    float truncated = (float)(Math.Truncate((double)B * 100.0) / 100.0);
    string load = (truncated + " " + Group[G]);

    return load;
}

答案 12 :(得分：0)

我最近需要这个，并要求将in字节转换为长数字。

用法：Byte.Kb.ToLong(1)应该为1024。

public enum Byte
{
    Kb,
    Mb,
    Gb,
    Tb
}

public static class ByteSize
{
    private const long OneKb = 1024;
    private const long OneMb = OneKb * 1024;
    private const long OneGb = OneMb * 1024;
    private const long OneTb = OneGb * 1024;

    public static long ToLong(this Byte size, int value)
    {
        return size switch
        {
            Byte.Kb => value * OneKb,
            Byte.Mb => value * OneMb,
            Byte.Gb => value * OneGb,
            Byte.Tb => value * OneTb,
            _ => throw new NotImplementedException("This should never be hit.")
        };
    }
}

使用xunit进行测试：

[Theory]
[InlineData(Byte.Kb, 1, 1024)]
[InlineData(Byte.Kb, 2, 2048)]
[InlineData(Byte.Mb, 1, 1048576)]
[InlineData(Byte.Mb, 2, 2097152)]
[InlineData(Byte.Gb, 1, 1073741824)]
[InlineData(Byte.Gb, 2, 2147483648)]
[InlineData(Byte.Tb, 1, 1099511627776)]
[InlineData(Byte.Tb, 2, 2199023255552)]
public void ToLong_WhenConverting_ShouldMatchExpected(Byte size, int value, long expected)
{
    var result = size.ToLong(value);

    result.Should().Be(expected);
}

答案 13 :(得分：0)

这是@drzaus的答案。我对其进行了修改，以利用舍入错误来发挥我们的优势，并正确管理单元边界附近的问题。它还处理负值。

将此C# Program拖放到LinqPad中：

// Kudos: https://stackoverflow.com/a/48467634/117797

void Main()
{
    0.ToFriendly().Dump();                      // 0 B
    857.ToFriendly().Dump();                    // 857 B
    (173*1024).ToFriendly().Dump();             // 173 KB
    (9541*1024).ToFriendly().Dump();            // 9.32 MB
    (5261890L*1024).ToFriendly().Dump();        // 5.02 GB

    1.ToFriendly().Dump();                      // 1 B
    1024.ToFriendly().Dump();                   // 1 KB
    1048576.ToFriendly().Dump();                // 1 MB
    1073741824.ToFriendly().Dump();             // 1 GB
    1099511627776.ToFriendly().Dump();          // 1 TB
    1125899906842620.ToFriendly().Dump();       // 1 PB
    1152921504606850000.ToFriendly().Dump();    // 1 EB
}

public static class Extensions
{
    static string[] _byteUnits = new[] { "B", "KB", "MB", "GB", "TB", "PB", "EB" };

    public static string ToFriendly(this int number, int decimals = 2)
    {
        return ((double)number).ToFriendly(decimals);
    }

    public static string ToFriendly(this long number, int decimals = 2)
    {
        return ((double)number).ToFriendly(decimals);
    }

    public static string ToFriendly(this double number, int decimals = 2)
    {
        const double divisor = 1024;

        int unitIndex = 0;
        var sign = number < 0 ? "-" : string.Empty;
        var value = Math.Abs(number);
        double lastValue = number;

        while (value > 1)
        {
            lastValue = value;

            // NOTE
            // The following introduces ever increasing rounding errors, but at these scales we don't care.
            // It also means we don't have to deal with problematic rounding errors due to dividing doubles.
            value = Math.Round(value / divisor, decimals);

            unitIndex++;
        }

        if (value < 1 && number != 0)
        {
            value = lastValue;
            unitIndex--;
        }

        return $"{sign}{value} {_byteUnits[unitIndex]}";
    }
}

输出为：

0 B
857 B
173 KB
9.32 MB
1.34 MB
5.02 GB
1 B
1 KB
1 MB
1 GB
1 TB
1 PB
1 EB

答案 14 :(得分：0)

针对 C# 9.0 进行了更新 Relational Patterns

public static string BytesToHumanReadable(ulong bytes)
{
    return bytes switch
    {
        (< OneKB) => $"{bytes}B",
        (>= OneKB) and (< OneMB) => $"{bytes / OneKB}KB",
        (>= OneMB) and (< OneGB) => $"{bytes / OneMB}MB",
        (>= OneGB) and (< OneTB) => $"{bytes / OneMB}GB",
        (>= OneTB) => $"{bytes / OneTB}"
        //...
    };
}

答案 15 :(得分：0)

对于我的项目，我已经将此（几乎没有修改）合并到UWP DataBinding Converter中，并认为它可能对其他人也有用。

代码是：

using System;
using System.Text;
using Windows.UI.Xaml.Data;

namespace MyApp.Converters
{
    public class ByteSizeConverter : IValueConverter
    {
        static readonly string[] sSizeSuffixes = { "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };

        // The number of decimal places the formatter should include in the scaled output - default 1dp
        public int DecimalPlaces { get; set; } = 1;

        public object Convert(object value, Type targetType, object parameter, string language)
        {
            Int64 intVal = System.Convert.ToInt64(value);

            return SizeSuffix(intVal);
        }

        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            // TODO: Parse string into number and suffix
            //       Scale number by suffix multiplier to get bytes
            throw new NotImplementedException();
        }

        string SizeSuffix(Int64 value)
        {
            if (this.DecimalPlaces < 0) { throw new ArgumentOutOfRangeException(String.Format("DecimalPlaces = {0}", this.DecimalPlaces)); }
            if (value < 0) { return "-" + SizeSuffix(-value); }
            if (value == 0) { return string.Format("{0:n" + this.DecimalPlaces + "} bytes", 0); }

            // magnitude is 0 for bytes, 1 for KB, 2, for MB, etc.
            int magnitude = (int)Math.Log(value, 1024);
            // clip magnitude - only 8 values currently supported, this prevents out-of-bounds exception
            magnitude = Math.Min(magnitude, 8);

            // 1L << (magnitude * 10) == 2 ^ (10 * magnitude) [i.e. the number of bytes in the unit corresponding to magnitude]
            decimal adjustedSize = (decimal)value / (1L << (magnitude * 10));

            // make adjustment when the value is large enough that it would round up to 1000 or more
            if (Math.Round(adjustedSize, this.DecimalPlaces) >= 1000)
            {
                magnitude += 1;
                adjustedSize /= 1024;
            }

            return String.Format("{0:n" + this.DecimalPlaces + "} {1}", adjustedSize, sSizeSuffixes[magnitude]);
        }
    }
}

要使用它，请将本地资源添加到您的UserControl或Page XAML：

<UserControl.Resources>
    <converters:ByteSizeConverter x:Key="ByteFormat" DecimalPlaces="3" />
</UserControl.Resources>

在数据绑定模板或数据绑定实例中引用它：

<TextBlock HorizontalAlignment="Left" VerticalAlignment="Center"
    Text="{x:Bind MyItem.FileSize_bytes, Mode=OneWay, Converter={StaticResource ByteFormat}}" />

嘿，presto。魔术发生了。

答案 16 :(得分：0)

我将它用于Windows（二进制前缀）：

static readonly string[] BinaryPrefix = { "bytes", "KB", "MB", "GB", "TB" }; // , "PB", "EB", "ZB", "YB"
string GetMemoryString(double bytes)
{
    int counter = 0;
    double value = bytes;
    string text = "";
    do
    {
        text = value.ToString("0.0") + " " + BinaryPrefix[counter];
        value /= 1024;
        counter++;
    }
    while (Math.Floor(value) > 0 && counter < BinaryPrefix.Length);
    return text;
}

答案 17 :(得分：0)

https://github.com/logary/logary/blob/master/src/Logary/DataModel.fs#L832-L837 

let scaleBytes (value : float) : float * string =
    let log2 x = log x / log 2.
    let prefixes = [| ""; "Ki"; "Mi"; "Gi"; "Ti"; "Pi" |] // note the capital K and the 'i'
    let index = int (log2 value) / 10
    1. / 2.**(float index * 10.),
sprintf "%s%s" prefixes.[index] (Units.symbol Bytes)

答案 18 :(得分：0)

@Servy's answer很好而且简洁。我认为它可以更简单吗？

private static string[] suffixes = new [] { " B", " KB", " MB", " GB", " TB", " PB" };

public static string ToSize(double number, int precision = 2)
{
    // unit's number of bytes
    const double unit = 1024;
    // suffix counter
    int i = 0;
    // as long as we're bigger than a unit, keep going
    while(number > unit)
    {
        number /= unit;
        i++;
    }
    // apply precision and current suffix
    return Math.Round(number, precision) + suffixes[i];
}

答案 19 :(得分：0)

如上所述，在对数的帮助下，递归是最受欢迎的方式。

以下函数有3个参数：输入，输出的维度约束，即第三个参数。

>>> t
(1, 2, 3, 5)
>>> t = (1, 2, 3)
>>> t + (4, 5)
(1, 2, 3, 4, 5)
>>> t
(1, 2, 3)
>>> t += (4, 5)
>>> t
(1, 2, 3, 4, 5)
>>> t = t + (6, 7)
>>> t
(1, 2, 3, 4, 5, 6, 7)

现在让我们以几个单位转换12GB的RAM：

int ByteReDim(unsigned long ival, int constraint, unsigned long *oval)
{
    int base = 1 + (int) log10(ival);

    (*oval) = ival;
    if (base > constraint) {
        (*oval) = (*oval) >> 10;
        return(1 + ByteReDim((*oval), constraint, oval));
    } else
        return(0);
}

答案 20 :(得分：0)

一些递归怎么样：

private static string ReturnSize(double size, string sizeLabel)
{
  if (size > 1024)
  {
    if (sizeLabel.Length == 0)
      return ReturnSize(size / 1024, "KB");
    else if (sizeLabel == "KB")
      return ReturnSize(size / 1024, "MB");
    else if (sizeLabel == "MB")
      return ReturnSize(size / 1024, "GB");
    else if (sizeLabel == "GB")
      return ReturnSize(size / 1024, "TB");
    else
      return ReturnSize(size / 1024, "PB");
  }
  else
  {
    if (sizeLabel.Length > 0)
      return string.Concat(size.ToString("0.00"), sizeLabel);
    else
      return string.Concat(size.ToString("0.00"), "Bytes");
  }
}

然后你可以打电话给它：

ReturnSize(size, string.Empty);

答案 21 :(得分：0)

public static class MyExtension
{
    public static string ToPrettySize(this float Size)
    {
        return ConvertToPrettySize(Size, 0);
    }
    public static string ToPrettySize(this int Size)
    {
        return ConvertToPrettySize(Size, 0);
    }
    private static string ConvertToPrettySize(float Size, int R)
    {
        float F = Size / 1024f;
        if (F < 1)
        {
            switch (R)
            {
                case 0:
                    return string.Format("{0:0.00} byte", Size);
                case 1:
                    return string.Format("{0:0.00} kb", Size);
                case 2:
                    return string.Format("{0:0.00} mb", Size);
                case 3:
                    return string.Format("{0:0.00} gb", Size);
            }
        }
        return ConvertToPrettySize(F, ++R);
    }
}

答案 22 :(得分：0)

我选择了JerKimballs解决方案，然后竖起大拇指。 但是，我想补充一点，指出这确实是一个整体争议问题。在我的研究中（出于其他原因），我提出了以下信息。

当普通人（我听说他们存在）说千兆字节时，他们指的是公制系统，其中1000与原始字节数的幂为3 =千兆字节。 然而，当然还有IEC / JEDEC标准在维基百科中得到了很好的总结，而不是1000的功能，它们有1024个。 对于物理存储设备（我认为亚马逊等逻辑设备），这意味着公制与IEC之间的差异越来越大。 因此，例如1 TB == 1太字节度量为1000，功率为4，但IEC正式将相似数字称为1 TiB，tebibyte为1024，功率为4。 但是，唉，在非技术应用程序（我会选择观众）中，标准是指标，而在我自己的内部使用应用程序中，我现在解释文档中的差异。但出于显示目的，我甚至不提供任何指标。在内部，即使它与我的应用程序无关，我只存储字节并进行显示计算。

作为旁注，我发现.Net框架AFAIK（我经常错误地感谢权力）有点黯淡，即使在它的4.5版本中也没有包含任何关于内部任何库的内容。人们会期望在某种程度上某种类型的开源库是NuGettable，但我承认这是一个小小的问题。另一方面，System.IO.DriveInfo和其他人也只有字节（长），这是相当清楚的。

答案 23 :(得分：0)

怎么样：

public void printMB(uint sizekB)   
{
    double sizeMB = (double) sizekB / 1024;
    Console.WriteLine("Size is " + sizeMB.ToString("0.00") + "MB");
}

E.g。像

一样打电话 
printMB(123456);

会导致输出

"Size is 120,56 MB"

答案 24 :(得分：0)

没有

但你可以像这样实施; 

    static double ConvertBytesToMegabytes(long bytes)
    {
    return (bytes / 1024f) / 1024f;
    }

    static double ConvertKilobytesToMegabytes(long kilobytes)
    {
    return kilobytes / 1024f;
    }

另请查看How to correctly convert filesize in bytes into mega or gigabytes?

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