在C＃文本框中添加'空格'

Question

1. 大家好，所以我需要在顯示的文本框中的每個字符之間添加一個「空格」。

2. 我給用戶一個蒙面字像這樣He__o讓他猜，我想這與轉換爲H e _ _ o

3. 我使用下面的代碼來隨機替換字符'_'

   char[] partialWord = word.ToCharArray(); 
   
       int numberOfCharsToHide = word.Length/2;   //divide word length by 2 to get chars to hide 
       Random randomNumberGenerator = new Random();  //generate rand number 
       HashSet<int> maskedIndices = new HashSet<int>(); //This is to make sure that I select unique indices to hide. Hashset helps in achieving this 
       for (int i = 0; i < numberOfCharsToHide; i++)  //counter until it reaches words to hide 
       { 
        int rIndex = randomNumberGenerator.Next(0, word.Length);  //init rindex 
        while (!maskedIndices.Add(rIndex)) 
        { 
         rIndex = randomNumberGenerator.Next(0, word.Length); //This is to make sure that I select unique indices to hide. Hashset helps in achieving this 
        } 
        partialWord[rIndex] = '_';      //replace with _ 
       } 
       return new string(partialWord); 
   

4. 我曾嘗試：partialWord[rIndex] = '_ ';然而這帶來的錯誤「在文本字符太多」

5. 我曾嘗試過：partialWord[rIndex] = "_ ";但是，這會返回錯誤「無法將類型字符串轉換爲字符。

任何想法如何才能繼續實現每個字符之間的空間？

感謝

Answer 1

下面的代碼應該做的。我認爲這些代碼是非常明顯的，但是可以自由地詢問是否有任何不清楚代碼的原因或方式。

// char[] partialWord is used from question code 
char[] result = new char[(partialWord.Length * 2) - 1]; 
for(int i = 0; i < result.Length; i++) 
{ 
    result[i] = i % 2 == 0 ? partialWord[i/2] : ' '; 
} 
return new string(result); 

Answer 2

由於生成的字符串比原來的字符串長，因爲它的長度是恆定的，你不能只用一個字符數組。

下面是與StringBuilder一個解決方案：當你問

var builder = new StringBuilder(word); 
for (int i = 0 ; i < word.Length ; i++) { 
    builder.Insert(i * 2, " "); 
} 
return builder.ToString().TrimStart(' '); // TrimStart is called here to remove the leading whitespace. If you want to keep it, delete the call.