System.ArgumentOutOfRangeException错误

Z时代
2024-01-10
分类：问答

using System; 
using System.Text.RegularExpressions; 
using System.Globalization; 
public class Kata 
{ 
    public static string ToCamelCase(string str) 
    { 
     TextInfo myTI = new CultureInfo("en-US", false).TextInfo; 
     string clearStr = Regex.Replace(myTI.ToTitleCase(str), @"_|-", ""); 
     return clearStr = str.Substring(0, 3) + clearStr.Remove(0, 3);  
    } 
}

输入 - > ToCamelCase（ “the_stealth_warrior”）System.ArgumentOutOfRangeException错误

输入 - > ToCamelCase（以下简称 “隐身战士”）

Error: System.ArgumentOutOfRangeException : Index and length must refer to a location within the string. Parameter name: length

我在做什么错？

回答：

你必须要在Substring(0, 3)或Remove(0, 3)抛出的异常的情况下，无论是str或clearStr比3短。我建议增加验证：如果你传递一个字符串作为str参数是少于3个字符

public static string ToCamelCase(string str) { 
    // if str is null or too short 
    if (string.IsNullOrEmpty(str)) 
    return str; 
    else if (str.Length < 3) 
    return str; 
    TextInfo myTI = new CultureInfo("en-US", false).TextInfo; 
    string clearStr = Regex.Replace(myTI.ToTitleCase(str), @"_|-", ""); 
    // if clearStr is too short 
    if (clearStr.Length < 3) 
    return str; 
    return clearStr = str.Substring(0, 3) + clearStr.Remove(0, 3); 
}