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
// 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";
其他回答
string xyz = "1 2 3 4 5";
xyz = string.Join( " ", xyz.Split( new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries ));
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();
myString = Regex.Replace(myString, " {2,}", " ");
// 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";