驗證文件的文本匹配一定的格式

Question

我需要驗證文件的文本包含以下格式的文本：

#0
DIRECTION: FORWARD
SPEED: 10
TIME: 10

OR

#1
DIRECTION: REVERSE
SPEED: 10
ROTATIONS: 10

而且這將重複多個步驟。

凡#必須跟一個數字，DIRECTION必須跟FORWARD或REVERSE，SPEED必須跟一個數字和最後一行之後，將一些或者TIME或ROTATIONS。

我想驗證文件是否包含此格式的文本，並且在開始讀取值之前不會出現一些奇怪的值。
我可以使用某種類型的通配符嗎？我已經開始研究正則表達式，但我之前沒有使用它。
我想什麼做的是做一些類型比較，其中數字是通配符，這樣，我知道，如果行包含的基本格式：

if(fileLines[0].Matches("#%")) // Where % would be the wildcard? 
if(fileLines[1].Matches("DIRECTION:%")) // Does something like this exist? 

Answer 1

這種模式似乎工作

string[] lines = 
    { 
     "#0", 
     "DIRECTION: FORWARD", 
     "SPEED: 10", 
     "TIME: 10" 
    }; 

     // meaning At start of line there is a # followed by digits till the end of line 
    if(checkLine(@"^#\d+$", lines[0]) == false) 
     Console.WriteLine("False on line 1"); 
    else 
     Console.WriteLine("True on line 1"); 

     // meaning At start of line there is the word DIRECTION: followed by space and the words REVERSE or FORWARD 
    if(checkLine(@"^DIRECTION: (REVERSE|FORWARD)", lines[1]) == false) 
     Console.WriteLine("False on line 2"); 
    else 
     Console.WriteLine("True on line 2"); 

     // meaning At start of line there is the word SPEED: followed by a space and digits till the end of the line 
    if(checkLine(@"^SPEED: \d+$", lines[2]) == false) 
     Console.WriteLine("False on line 3"); 
    else 
     Console.WriteLine("True on line 3"); 

     // meaning At start of line there are the words TIME or ROTATIONS followed by colon, space and digits till the end of the line 
    if(checkLine(@"^(TIME|ROTATIONS): \d+$", lines[3]) == false) 
     Console.WriteLine("False on line 4"); 
    else 
     Console.WriteLine("True on line 4"); 
} 

// Define other methods and classes here 
private bool checkLine(string regExp, string line) 
{ 
    Regex r = new Regex(regExp); 
    return r.IsMatch(line); 
} 

Answer 2

假設您已經將文件中的所有行作爲通用列表讀取。

 List<string> fileLines = new List<string>(); 
     fileLines.Add("#0"); 
     fileLines.Add("DIRECTION: FORWARD"); 
     fileLines.Add("SPEED: 10"); 
     fileLines.Add("TIME: 10"); 
     fileLines.Add("#1"); 
     fileLines.Add("DIRECTION: REVERSE"); 
     fileLines.Add("SPEED: 10"); 
     fileLines.Add("ROTATIONS: 10"); 

。利用此功能來驗證文件是否有效

信用：史蒂夫的正則表達式實現

public bool CheckConsistancy(List<string> fileLines) 
    { 
     bool status = false; 
     if (fileLines != null && fileLines.Count > 0) 
     { 
      if(fileLines.Count % 4 == 0) 
      { 
       List<List<string>> fileLineGroups = fileLines.Select((x, i) => new { Index = i, Value = x }).GroupBy(x => x.Index/4).Select(x => x.Select(v => v.Value).ToList()).ToList(); 
       foreach (List<string> fileLineGroup in fileLineGroups) 
       { 
        if (checkLine(@"^#\d", fileLineGroup[0])) 
        { 
         if (checkLine(@"^DIRECTION: (REVERSE|FORWARD)", fileLineGroup[1])) 
         { 
          if (checkLine(@"^SPEED: \d", fileLineGroup[2])) 
          { 
           if (checkLine(@"^(TIME|ROTATIONS): \d", fileLineGroup[3])) 
           { 
            status = true; 
           } 
           else 
           { 
            status = false; 
            break; 
           } 
          } 
          else 
          { 
           status = false; 
           break; 
          } 
         } 
         else 
         { 
          status = false; 
          break; 
         } 
        } 
        else 
        { 
         status = false; 
         break; 
        } 
       } 
      } 
      else 
      { 
       status = false; 
      } 
     } 
     return status; 
    } 

    private bool checkLine(string regExp, string line) 
    { 
     Regex r = new Regex(regExp); 
     return r.IsMatch(line); 
    } 

調用函數來檢查相合

bool status = CheckConsistancy(fileLines);