78 lines
2.3 KiB
C#
78 lines
2.3 KiB
C#
namespace Easy.Core;
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/// <summary>
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/// 金额处理工具类
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/// 统一处理货币单位转换、精度控制和四舍五入规则
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/// </summary>
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public static class AmountHelper
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{
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/// <summary>
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/// 金额精度小数位数
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/// </summary>
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private const int DecimalPlaces = 2;
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/// <summary>
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/// 将元转换为分
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/// </summary>
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/// <param name="amount">金额（元）</param>
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/// <returns>金额（分）</returns>
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public static int YuanToFen(decimal amount)
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{
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var roundedAmount = Math.Round(amount, DecimalPlaces, MidpointRounding.AwayFromZero);
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return (int)Math.Round(roundedAmount * 100, MidpointRounding.AwayFromZero);
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}
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/// <summary>
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/// 将分转换为元
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/// </summary>
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/// <param name="amount">金额（分）</param>
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/// <returns>金额（元）</returns>
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public static decimal FenToYuan(int amount)
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{
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return amount / 100m;
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}
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/// <summary>
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/// 将分转换为元（可为空）
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/// </summary>
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/// <param name="amount">金额（分）</param>
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/// <returns>金额（元）</returns>
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public static decimal? FenToYuan(int? amount)
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{
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if (!amount.HasValue) return null;
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return amount.Value / 100m;
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}
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/// <summary>
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/// 四舍五入金额到指定小数位
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/// </summary>
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/// <param name="amount">金额</param>
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/// <param name="decimalPlaces">小数位数，默认2位</param>
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/// <returns>四舍五入后的金额</returns>
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public static decimal Round(decimal amount, int decimalPlaces = DecimalPlaces)
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{
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return Math.Round(amount, decimalPlaces, MidpointRounding.AwayFromZero);
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}
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/// <summary>
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/// 验证金额格式是否正确（最多保留2位小数）
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/// </summary>
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/// <param name="amount">金额</param>
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/// <returns>是否有效</returns>
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public static bool IsValidAmount(decimal amount)
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{
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var rounded = Math.Round(amount, DecimalPlaces, MidpointRounding.AwayFromZero);
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return rounded == amount;
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}
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/// <summary>
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/// 验证金额是否大于0且格式正确
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/// </summary>
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/// <param name="amount">金额</param>
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/// <returns>是否有效</returns>
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public static bool IsValidPositiveAmount(decimal amount)
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{
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return amount > 0 && IsValidAmount(amount);
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}
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}
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