42 lines
1.8 KiB
C#
42 lines
1.8 KiB
C#
using System;
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using System.Diagnostics.CodeAnalysis;
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namespace Falcon.SugarApi
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{
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/// <summary>
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/// 字符串扩展
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/// </summary>
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public static class StringExtend
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{
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/// <summary>
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/// 字符串是否为空或null
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/// </summary>
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/// <param name="str">字符串</param>
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/// <returns>空或null为True，否则False</returns>
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public static bool IsNullOrEmpty(this string? str) => str == null || string.IsNullOrEmpty(str);
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/// <summary>
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/// 字符串是否不为空或null
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/// </summary>
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/// <param name="str">字符串</param>
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/// <returns>与IsNullOrEmpty相反</returns>
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public static bool IsNotNullOrEmpty(this string? str) => !str.IsNullOrEmpty();
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/// <summary>
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/// 当字符串IsNullOrEmpty为True的时候返回默认值，否则返回本身
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/// </summary>
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/// <param name="str">字符串</param>
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/// <param name="defaultVal">默认值</param>
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/// <returns>字符串本身或默认值</returns>
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public static string? ToDefault(this string? str, [NotNull] string defaultVal) => str.IsNullOrEmpty() ? defaultVal : str;
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/// <summary>
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/// 使用全角半角的逗号句号和分号分割字符串。
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/// </summary>
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/// <param name="str">要分割的字符串</param>
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/// <param name="splitChars"></param>
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/// <returns>字符串数组。当str为null时返回空数组</returns>
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public static string[] SplitStr(this string? str, params char[] splitChars)
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=> str.IsNullOrEmpty() ? Array.Empty<string>() : str.Split(splitChars.Length == 0 ? new char[] { ',', '，', ';', '；', '.', '。' } : splitChars, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
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}
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}
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