如何使这项工作，我不能用不同的方法调用字符串，请帮忙 [英] How to make this work, I cant call the string in a different method, please help

问题描述

  static string [] x = {"Бургас"，"Варна"，"Силистра"，"Търговище"，"Ловеч"，"
             "Кърджали"，"Пловдив"，"Благоевград"，"Пазарджик"，"Асеновград"，"Ботевград"，"ВеликоТърново"，"Габрово"，"
            "Димитровград"，"Копривщица"，  "Крумовград"，  "Кърджали" };
        static void打印（string [] a）

        {           

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; for（int i = 0; i< a.Length; i ++）

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; {

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; string element = a [i];

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（i + 1 +"：" + a [i]）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; }¥b $ b  &NBSP; &NBSP; &NBSP; }¥b $ b  &NBSP; &NBSP; &NBSP; public static void SolveB（string [] a）

  &NBSP; &NBSP; &NBSP; {

$
  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; string part ="град";

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; bool show = x.Contains（part）;

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; int firstCharacter = x.IndexOf（part）;



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Console.WriteLine（"First occurrence：{0}"，firstCharacter，part）;
$


$
  &NBSP; &NBSP; &NBSP; }

 static string[] x = {"Бургас","Варна","Силистра","Търговище","Ловеч",
             "Кърджали","Пловдив","Благоевград","Пазарджик","Асеновград","Ботевград","Велико Търново","Габрово",
            "Димитровград","Копривщица",  "Крумовград",  "Кърджали" };
        static void Print(string[] a)
        {           
            for (int i = 0; i < a.Length; i++)
            {
                string element = a[i];
                Console.WriteLine(i+1+": "+a[i]);
            }
        }
        public static void SolveB(string[] a)
        {

            string part = "град";
            bool show =x.Contains(part);
            int firstCharacter = x.IndexOf(part);

            Console.WriteLine("First occurrence: {0}", firstCharacter,part);


        }

  }
}

  }
}

推荐答案

请注意，x不是您声明的字符串，而是字符串数组。该数组不包含任何名为"IndexOf"的方法，因此您的代码会在您编写的行中产生编译错误：int firstCharacter =
x.IndexOf（part）。其余代码正确编译。

Note that x is not a string as you claim, but rather it is an array of strings. The array does not contain any method called "IndexOf", and therefore your code produces a compilation error in the line where you write  int firstCharacter = x.IndexOf(part). The rest of the code compiles correctly.

您应该检查您要执行的操作，并确保在单个字符串上调用IndexOf，而不是在整个字符串数组上调用。

You should review what you are trying to do, and ensure that you call IndexOf on a single string, not on the whole array of strings.

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