37 lines
1.1 KiB
C#
37 lines
1.1 KiB
C#
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using System;
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namespace HT.Cloud.Code
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{
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/// <summary>
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/// string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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/// <summary>
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/// 从分隔符开始向尾部截取字符串
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/// </summary>
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/// <param name="this">源字符串</param>
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/// <param name="separator">分隔符</param>
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/// <param name="lastIndexOf">true：从最后一个匹配的分隔符开始截取，false：从第一个匹配的分隔符开始截取，默认：true</param>
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/// <returns>string</returns>
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public static string Substring(this string @this, string separator, bool lastIndexOf = true)
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{
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var startIndex = (lastIndexOf ?
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@this.LastIndexOf(separator, StringComparison.OrdinalIgnoreCase) :
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@this.IndexOf(separator, StringComparison.OrdinalIgnoreCase)) +
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separator.Length;
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var length = @this.Length - startIndex;
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return @this.Substring(startIndex, length);
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}
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#region 字符串截取第一个
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public static string ReplaceFrist(this string str, string oldChar, string newChar)
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{
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int idx = str.IndexOf(oldChar);
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str = str.Remove(idx, oldChar.Length);
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str = str.Insert(idx, newChar);
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return str;
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}
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#endregion
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}
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}
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