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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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namespace Magic.Core;
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/// <summary>
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/// 转换扩展类
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/// </summary>
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public static partial class Extensions
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{
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#region 转换为long
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/// <summary>
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/// 将object转换为long，若转换失败，则返回0。不抛出异常。
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static long ParseToLong(this object obj)
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{
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try
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{
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return long.Parse(obj.ToString() ?? string.Empty);
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}
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catch
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{
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return 0L;
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}
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}
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/// <summary>
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/// 将object转换为long，若转换失败，则返回指定值。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static long ParseToLong(this string str, long defaultValue)
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{
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try
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{
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return long.Parse(str);
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}
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catch
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{
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return defaultValue;
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}
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}
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#endregion
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#region 转换为int
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/// <summary>
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/// 将object转换为int，若转换失败，则返回0。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static int ParseToInt(this object str)
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{
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try
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{
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return Convert.ToInt32(str);
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}
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catch
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{
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return 0;
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}
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}
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/// <summary>
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/// 将object转换为int，若转换失败，则返回指定值。不抛出异常。
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/// null返回默认值
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/// </summary>
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/// <param name="str"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static int ParseToInt(this object str, int defaultValue)
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{
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if (str == null)
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{
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return defaultValue;
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}
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try
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{
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return Convert.ToInt32(str);
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}
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catch
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{
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return defaultValue;
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}
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}
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#endregion
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#region 转换为short
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/// <summary>
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/// 将object转换为short，若转换失败，则返回0。不抛出异常。
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static short ParseToShort(this object obj)
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{
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try
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{
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return short.Parse(obj.ToString() ?? string.Empty);
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}
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catch
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{
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return 0;
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}
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}
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/// <summary>
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/// 将object转换为short，若转换失败，则返回指定值。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static short ParseToShort(this object str, short defaultValue)
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{
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try
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{
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return short.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return defaultValue;
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}
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}
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#endregion
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#region 转换为demical
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/// <summary>
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/// 将object转换为demical，若转换失败，则返回指定值。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static decimal ParseToDecimal(this object str, decimal defaultValue)
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{
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try
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{
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return decimal.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return defaultValue;
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}
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}
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/// <summary>
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/// 将object转换为demical，若转换失败，则返回0。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static decimal ParseToDecimal(this object str)
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{
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try
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{
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return decimal.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return 0;
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}
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}
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#endregion
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#region 转化为bool
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/// <summary>
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/// 将object转换为bool，若转换失败，则返回false。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static bool ParseToBool(this object str)
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{
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try
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{
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return bool.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return false;
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}
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}
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/// <summary>
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/// 将object转换为bool，若转换失败，则返回指定值。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <param name="result"></param>
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/// <returns></returns>
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public static bool ParseToBool(this object str, bool result)
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{
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try
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{
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return bool.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return result;
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}
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}
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#endregion
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#region 转换为float
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/// <summary>
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/// 将object转换为float，若转换失败，则返回0。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static float ParseToFloat(this object str)
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{
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try
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{
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return float.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return 0;
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}
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}
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/// <summary>
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/// 将object转换为float，若转换失败，则返回指定值。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <param name="result"></param>
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/// <returns></returns>
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public static float ParseToFloat(this object str, float result)
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{
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try
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{
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return float.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return result;
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}
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}
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#endregion
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#region 转换为Guid
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/// <summary>
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/// 将string转换为Guid，若转换失败，则返回Guid.Empty。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static Guid ParseToGuid(this string str)
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{
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try
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{
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return new Guid(str);
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}
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catch
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{
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return Guid.Empty;
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}
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}
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#endregion
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#region 转换为DateTime
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/// <summary>
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/// 将string转换为DateTime，若转换失败，则返回日期最小值。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static DateTime ParseToDateTime(this string str)
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{
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try
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{
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if (string.IsNullOrWhiteSpace(str))
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{
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return DateTime.MinValue;
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}
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if (str.Contains("-") || str.Contains("/"))
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{
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return DateTime.Parse(str);
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}
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var length = str.Length;
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return length switch
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{
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4 => DateTime.ParseExact(str, "yyyy", CultureInfo.CurrentCulture),
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6 => DateTime.ParseExact(str, "yyyyMM", CultureInfo.CurrentCulture),
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8 => DateTime.ParseExact(str, "yyyyMMdd", CultureInfo.CurrentCulture),
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10 => DateTime.ParseExact(str, "yyyyMMddHH", CultureInfo.CurrentCulture),
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12 => DateTime.ParseExact(str, "yyyyMMddHHmm", CultureInfo.CurrentCulture),
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// ReSharper disable once StringLiteralTypo
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14 => DateTime.ParseExact(str, "yyyyMMddHHmmss", CultureInfo.CurrentCulture),
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// ReSharper disable once StringLiteralTypo
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_ => DateTime.ParseExact(str, "yyyyMMddHHmmss", CultureInfo.CurrentCulture)
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};
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}
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catch
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{
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return DateTime.MinValue;
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}
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}
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/// <summary>
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/// 将string转换为DateTime，若转换失败，则返回默认值。
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/// </summary>
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/// <param name="str"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static DateTime ParseToDateTime(this string str, DateTime? defaultValue)
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{
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try
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{
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if (string.IsNullOrWhiteSpace(str))
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{
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return defaultValue.GetValueOrDefault();
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}
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if (str.Contains("-") || str.Contains("/"))
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{
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return DateTime.Parse(str);
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}
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var length = str.Length;
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return length switch
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{
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4 => DateTime.ParseExact(str, "yyyy", CultureInfo.CurrentCulture),
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6 => DateTime.ParseExact(str, "yyyyMM", CultureInfo.CurrentCulture),
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8 => DateTime.ParseExact(str, "yyyyMMdd", CultureInfo.CurrentCulture),
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10 => DateTime.ParseExact(str, "yyyyMMddHH", CultureInfo.CurrentCulture),
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12 => DateTime.ParseExact(str, "yyyyMMddHHmm", CultureInfo.CurrentCulture),
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// ReSharper disable once StringLiteralTypo
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14 => DateTime.ParseExact(str, "yyyyMMddHHmmss", CultureInfo.CurrentCulture),
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// ReSharper disable once StringLiteralTypo
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_ => DateTime.ParseExact(str, "yyyyMMddHHmmss", CultureInfo.CurrentCulture)
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};
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}
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catch
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{
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return defaultValue.GetValueOrDefault();
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}
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}
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#endregion
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#region 转换为string
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/// <summary>
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/// 将object转换为string，若转换失败，则返回""。不抛出异常。
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static string ParseToString(this object obj)
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{
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try
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{
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return obj == null ? string.Empty : obj.ToString();
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}
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catch
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{
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return string.Empty;
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}
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}
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/// <summary>
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///
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static string ParseToStrings<T>(this object obj)
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{
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try
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{
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if (obj is IEnumerable<T> list)
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{
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return string.Join(",", list);
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}
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return obj.ToString();
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}
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catch
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{
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return string.Empty;
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}
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}
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#endregion
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#region 转换为double
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/// <summary>
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/// 将object转换为double，若转换失败，则返回0。不抛出异常。
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static double ParseToDouble(this object obj)
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{
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try
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{
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return double.Parse(obj.ToString() ?? string.Empty);
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}
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catch
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{
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return 0;
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}
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}
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/// <summary>
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/// 将object转换为double，若转换失败，则返回指定值。不抛出异常。
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/// </summary>
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/// <param name="str"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static double ParseToDouble(this object str, double defaultValue)
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{
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try
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{
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return double.Parse(str.ToString() ?? string.Empty);
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}
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catch
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{
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return defaultValue;
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}
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}
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#endregion
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#region 强制转换类型
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/// <summary>
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/// 强制转换类型
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/// </summary>
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/// <typeparam name="TResult"></typeparam>
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/// <param name="source"></param>
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/// <returns></returns>
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public static IEnumerable<TResult> CastSuper<TResult>(this IEnumerable source)
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{
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return from object item in source select (TResult)Convert.ChangeType(item, typeof(TResult));
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}
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#endregion
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#region 转换为ToUnixTime
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public static long ParseToUnixTime(this DateTime nowTime)
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{
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var startTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);
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return (long)Math.Round((nowTime - startTime).TotalMilliseconds, MidpointRounding.AwayFromZero);
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}
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#endregion
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}
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