Question

我将字符串作为输入，由于稍后需要进行一些处理，因此该字符串在字符串中的任何位置都不包含2个或多个连续的白点至关重要。

例如

string foo = "I am OK" is a valid string
string foo = " I am OK " is a valid string
string foo = "  I am OK" is NOT a valid string due to the initial double white space
string foo = "I am OK  " is NOT a valid string due to the trailing double whitespaces
string foo = " I am  OK " is NOT a valid string since it has 2 whitespaces between am and OK

我想您明白了，我尝试使用以下代码对字符串进行规范化

string normalizedQuery = apiInputObject.Query.Replace(" ", "");

但这只能奏效，我确定字符串中包含单个空格，这就是为什么我需要确保字符串再也没有空格，所以我可以使用该替换。

如何确保字符串适合我的格式？

Answer 1

您可以尝试使用正则表达式模式@"^(?!.*[ ]{2}).*$"：

Match result = Regex.Match("One space", @"^(?!.*[ ]{2}).*$");
if (result.Success) {
    Console.WriteLine("ONLY ONE SPACE OR LESS");
}

Answer 2

使用IndexOf。

public static void Main()
{
    var tests = new string[]
    {
         "I am OK",
         " I am OK ",
         "  I am OK",
         "I am OK  ",
         " I am  OK " 
    };
    foreach (var test in tests)
    {
        var hasDoubleSpace = (test.IndexOf("  ") != -1);
        Console.WriteLine("'{0}' {1} double spaces", test, hasDoubleSpace ? "has" : "does not have");
    }
}

输出：

'I am OK' does not have double spaces
' I am OK ' does not have double spaces
'  I am OK' has double spaces
'I am OK  ' has double spaces
' I am  OK ' has double spaces

Fiddle

Answer 3

根据您的要求，我认为您只需要将两个连续的空格替换为一个即可。

foo=foo.Replace("  "," ");

Answer 4

您可以使用String.Contains查找" "，但是如果用户可以键入ANYTHING，则比简单的空格（例如各种unicode空格，象形文字等）要面临更大的问题（也就是说，除非您的后期处理只会寻找简单的空格，否则会被unicode容忍）。

Answer 5

function httpPostRequest($url, $strRequest,$auth)
    {

    $fields = array(
        'strRequest' => $strRequest,
        'access_token' => $access_token
    );

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
    $isSecure = strpos($url, "https://");
    if ($isSecure === 0) {
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
    }

    $result = curl_exec($ch);
    $this->errorCode = curl_errno($ch);
    $this->errorMessage = curl_error($ch);
    return $result;
    }

Answer 6

我将逐个字符遍历整个字符串，并检查两个并排字符是否为空格：

for(int i=0; i<foo.Length-1; i++){
    if(foo[i] == ' ' && foo[i+1] == ' '){
        return false;
    }
}
return true;

如何确保字符串中的任何地方都不能超过单个空格？

6 个答案: