我有一个字符串数组：
string[] arr2 = { "/","@","&" };
我有另一个字符串(即strValue).是否有一种干净的方法用单个值(即下划线)替换数组内容的所有实例？所以之前：
strValue = "a/ new string,with some@ values&"
之后：
strValue = "a_ new string,with some_ values_"
我考虑过这样做：
strValue = strValue.Replace("/","_");
strValue = strValue.Replace("@","_");
strValue = strValue.Replace("&","_");
但我要替换的角色数组可能会变得更大.
解决方法
你可以自己编写,而不是一遍又一遍地使用替换.这可能是你提到的性能提升
But my array may get a lot bigger.
public string Replace(string original,char replacement,params char[] replaceables)
{
StringBuilder builder = new StringBuilder(original.Length);
HashSet<char> replaceable = new HashSet<char>(replaceables);
foreach(Char character in original)
{
if (replaceable.Contains(character))
builder.Append(replacement);
else
builder.Append(character);
}
return builder.ToString();
}
public string Replace(string original,string replaceables)
{
return Replace(original,replacement,replaceables.tocharArray());
}
可以像这样调用：
Debug.WriteLine(Replace("a/ new string,with some@ values&",'_','/','@','&'));
Debug.WriteLine(Replace("a/ new string,new[] { '/','&' }));
Debug.WriteLine(Replace("a/ new string,existingArray));
Debug.WriteLine(Replace("a/ new string,"/@&"));
输出：
a_ new string,with some_ values_ a_ new string,with some_ values_
正如@Sebi指出的那样,这也可以作为一种扩展方法：
public static class StringExtensions
{
public static string Replace(this string original,params char[] replaceables)
{
StringBuilder builder = new StringBuilder(original.Length);
HashSet<Char> replaceable = new HashSet<char>(replaceables);
foreach (Char character in original)
{
if (replaceable.Contains(character))
builder.Append(replacement);
else
builder.Append(character);
}
return builder.ToString();
}
public static string Replace(this string original,string replaceables)
{
return Replace(original,replaceables.tocharArray());
}
}
用法：
"a/ new string,with some@ values&".Replace('_','&');
existingString.Replace('_','&' });
// etc.
