#region
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using System;
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#endregion
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namespace CSFrameworkV5.Common
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{
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/// <summary>
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/// 四舍五入类
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/// </summary>
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public class MathRound
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{
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/// <summary>
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/// 实现数据的四舍五入法
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/// </summary>
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/// <param name="v">要进行处理的数据</param>
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/// <param name="x">保留的小数位数</param>
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/// <returns>四舍五入后的结果</returns>
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public static double Round(double v, int x)
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{
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var isNegative = false;
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//如果是负数
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if (v < 0)
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{
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isNegative = true;
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v = -v;
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}
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var IValue = 1;
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for (var i = 1; i <= x; i++) IValue = IValue * 10;
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var Int = Math.Round(v * IValue + 0.5, 0);
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v = Int / IValue;
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if (isNegative) v = -v;
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return v;
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}
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/// <summary>
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/// 实现数据的进一发
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/// </summary>
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/// <param name="v">要进行处理的数据</param>
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/// <param name="x">保留的小数位数</param>
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/// <returns>进一的结果</returns>
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public double RoundIn(double v, int x)
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{
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//如果是负数
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if (v < 0) v = -v;
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var IValue = 1;
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for (var i = 1; i <= x + 1; i++) IValue = IValue * 10;
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var Int = Math.Round(v + 5.00 / IValue, x,
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MidpointRounding.AwayFromZero);
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return Int;
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}
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/// <summary>
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/// 实现数据的舍去发
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/// </summary>
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/// <param name="v">要进行处理的数据</param>
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/// <param name="x">保留的小数位数</param>
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/// <returns>舍去后的结果</returns>
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public static double RoundRej(double v, int x)
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{
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//v = 1.224;
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var part = v.ToStringEx().Split('.');
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if (part.Length == 1) return v;
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part[1] = part[1].PadRight(x, '0').Substring(0, x);
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var dd = double.Parse(part[0] + "." + part[1]);
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return dd;
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}
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}
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}
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