如何用c#中的一个空格替换字符串中的多个空格?
例子:
1 2 3 4 5
是:
1 2 3 4 5
如何用c#中的一个空格替换字符串中的多个空格?
例子:
1 2 3 4 5
是:
1 2 3 4 5
当前回答
试试这个方法
private string removeNestedWhitespaces(char[] st)
{
StringBuilder sb = new StringBuilder();
int indx = 0, length = st.Length;
while (indx < length)
{
sb.Append(st[indx]);
indx++;
while (indx < length && st[indx] == ' ')
indx++;
if(sb.Length > 1 && sb[0] != ' ')
sb.Append(' ');
}
return sb.ToString();
}
像这样使用它:
string test = removeNestedWhitespaces("1 2 3 4 5".toCharArray());
其他回答
string sentence = "This is a sentence with multiple spaces";
RegexOptions options = RegexOptions.None;
Regex regex = new Regex("[ ]{2,}", options);
sentence = regex.Replace(sentence, " ");
没有Regex,没有Linq…删除开头和结尾空格,并将任何嵌入的多个空格段减少为一个空格
string myString = " 0 1 2 3 4 5 ";
myString = string.Join(" ", myString.Split(new char[] { ' ' },
StringSplitOptions.RemoveEmptyEntries));
结果:“0 1 2 3 4 5”
// Mysample string
string str ="hi you are a demo";
//Split the words based on white sapce
var demo= str .Split(' ').Where(s => !string.IsNullOrWhiteSpace(s));
//Join the values back and add a single space in between
str = string.Join(" ", demo);
// output: string str ="hi you are a demo";
我刚刚写了一个我喜欢的新Join,所以我想我应该重新回答,用它:
public static string Join<T>(this IEnumerable<T> source, string separator)
{
return string.Join(separator, source.Select(e => e.ToString()).ToArray());
}
关于它的一个很酷的事情是,它通过在元素上调用ToString()来处理不是字符串的集合。用法还是一样的:
//...
string s = " 1 2 4 5".Split (
" ".ToCharArray(),
StringSplitOptions.RemoveEmptyEntries
).Join (" ");
您可以使用RemoveDoubleSpaces()这样的方法创建StringsExtensions文件。
StringsExtensions.cs
public static string RemoveDoubleSpaces(this string value)
{
Regex regex = new Regex("[ ]{2,}", RegexOptions.None);
value = regex.Replace(value, " ");
// this removes space at the end of the value (like "demo ")
// and space at the start of the value (like " hi")
value = value.Trim(' ');
return value;
}
然后你可以这样使用它:
string stringInput =" hi here is a demo ";
string stringCleaned = stringInput.RemoveDoubleSpaces();