C＃编译错误转换字符[]到字符串[]

Question

我想编译一个c3程序，但我一直在获取下面的错误。

错误CS1502：string.Join(string, string[])的最佳重载方法匹配有一些无效参数。

错误CS1503：参数#2不能转换char[]表达键入string[]

for (int row = 0; row < 3; row++) 
{ 
    char[] arr = new char[3]; 
    for (int col = 0; col < 3; col++) 
    { 
     if (board[row, col] == Player.None) 
     { 
      arr[col] = ' '; 
     } 
     else 
     { 
      arr[col] = board[row, col] == Player.P1 ? 'X' : 'O'; 
     } 
    } 

    Console.WriteLine("| {0} |", string.Join(" | ", arr)); 

Answer 1

当你的arr是char[]型的，你可以使用String(char[])构造函数来创建string对象实例

var strData= new string[]{new string(arr)}; 
Console.WriteLine("| {0} |", (string.Join(" | ", strData)); 

Answer 2

答案很简单，arr是char[]而不是string[]。

试试这个

Console.WriteLine("| {0} |", string.Join(" | ", arr.Select(a => a.ToString()))); 

Answer 3

你既可以遍历数组的char S（as suggested by others），或者你可以改变阵列的

for (int row = 0; row < 3; row++) 
{ 
    var arr = new string[3]; 
    for (int col = 0; col < 3; col++) 
    { 
     if (board[row, col] == Player.None) 
     { 
      arr[col] = " "; 
     } 
     else 
     { 
      arr[col] = board[row, col] == Player.P1 ? "X" : "O"; 
     } 
    } 

    Console.WriteLine("| {0} |", string.Join(" | ", arr)); 
}