public static string ToUnitString(FileSizeMode mode, FileSizeUnit unit)
{
if (mode == FileSizeMode.Binary && unit != FileSizeUnit.Bytes)
{
var str = unit.ToString();
var index = str.IndexOf('B');
return(str.Insert(index, "i"));
}
else if (mode == FileSizeMode.SI)
{
return(unit.ToString());
}
return(unit.ToString());
}
/// <summary>
/// 获取文件大小
/// </summary>
/// <param name="length">长度：字节</param>
/// <param name="unit">单位，枚举：FileSizeUnit</param>
/// <returns></returns>
public static string GetFileSize(decimal length, FileSizeUnit unit = FileSizeUnit.KB)
{
decimal num = 0m;
switch (unit)
{
case FileSizeUnit.TB:
num = Math.Round((decimal)(length / (1024m * 1024m * 1024m * 1024m)), 2, MidpointRounding.AwayFromZero);
break;
case FileSizeUnit.GB:
num = Math.Round((decimal)(length / (1024m * 1024m * 1024m)), 2, MidpointRounding.AwayFromZero);
break;
case FileSizeUnit.MB:
num = Math.Round((decimal)(length / (1024m * 1024m)), 2, MidpointRounding.AwayFromZero);
break;
case FileSizeUnit.KB:
default:
num = Math.Round((decimal)(length / 1024m), 2, MidpointRounding.AwayFromZero);
break;
}
return(num.ToString() + unit.ToString());
}
/// <summary>Converts a file-size in the give unit to a different unit.</summary>
/// <param name="sourceUnit">The source unit the 'value' is currently in.</param>
/// <param name="targetUnit">The unit to convert to.</param>
/// <param name="value">The file-size value to convert.</param>
public static double ConvertTo(this FileSizeUnit sourceUnit, FileSizeUnit targetUnit, double value)
{
// Setup initial conditions.
var bytes = sourceUnit.ToBytes(value);
// Perform conversion.
const int multiplier = 1024;
if (targetUnit == FileSizeUnit.Byte) return bytes;
if (targetUnit == FileSizeUnit.Kilobyte) return bytes / multiplier;
if (targetUnit == FileSizeUnit.Megabyte) return bytes / multiplier / multiplier;
if (targetUnit == FileSizeUnit.Gigabyte) return bytes / multiplier / multiplier / multiplier;
if (targetUnit == FileSizeUnit.Terabyte) return bytes / multiplier / multiplier / multiplier / multiplier;
throw new NotSupportedException(targetUnit.ToString());
}
public static string ToRQLString(this FileSizeUnit unit)
{
return(unit.ToString());
}
/// <summary>
/// 将B单位转换为1024内的长度
/// </summary>
/// <param name="fileSizeForBytes">文件字节长度</param>
/// <param name="fileSizeUnit">单位类型</param>
/// <returns></returns>
public static string ChangeFileSizeUnit(this long fileSizeForBytes, FileSizeUnit fileSizeUnit)
{
return($"{(fileSizeForBytes >> (int)fileSizeUnit)}{fileSizeUnit.ToString()}");
}