[C# String]查找指定字符串在源字符串出现的次数

/// <summary> /// 查找指定字符串在源字符串出现的次数(type--"for":遍历；"replace":替换；"split":分隔) /// </summary> /// <param name="sourceString">源字符串</param> /// <param name="appointString">指定字符串</param> /// <param name="type">查找的方式</param> /// <returns>出现的次数(>=0:次数；-1:源字符串长度小于指定字符串；-2:源字符串或者指定字符串长度为0；-3:源字符串或者指定字符串为null)</returns> public static int GetCountByAppointString(string sourceString, string appointString,string type) { if (sourceString == null || appointString == null) return -3; int int_count = 0; int int_AstringLength = appointString.Length; int int_SstringLength = sourceString.Length; if (int_SstringLength < int_AstringLength) return -1; if (int_SstringLength == 0 || int_AstringLength == 0) return -2; if (type == "for") { for (int i = 0; i < sourceString.Length - 2; i++) { if (sourceString.Substring(i, int_AstringLength) == appointString) int_count++; } } else if (type == "replace") { sourceString = sourceString.Replace(appointString,string.Empty); int_count = (int_SstringLength - sourceString.Length) / int_AstringLength; } else if (type == "split") { int_count = sourceString.Split(new string[] { appointString }, StringSplitOptions.None).Count() - 1; } return int_count; }

 

 

转载于:https://www.cnblogs.com/zichuanwahaha/p/3159899.html

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