如何搜索和替换只有精确匹配的字符串

问题描述：

我需要在一个字符串搜索和替换某些字符串

I need to search in a string and replace a certain string

例如：搜索字符串添加附加字符串文本框中输入。
替换添加与插入

Ex: Search String "Add Additional String to text box". Replace "Add" with "Insert"

总产值有望=插入附加字符串文本框中输入

Output expected = "Insert Additional String to text box"

如果您使用字符串s =添加附加字符串文本框中输入.replace（添加，插入）;

If you use string s="Add Additional String to text box".replace("Add","Insert");

输出结果=插入Insertitional字符串文本框中输入

Output result = "Insert Insertitional String to text box"

有任何人有想法，让这工作，得到所需的输出？

Have anyone got ideas to get this working to give the expected output?

感谢您！

答

您可以使用正则表达式来做到这一点：

You can use Regex to do this:

扩展方法例如：

public static class StringExtensions
{
    public static string SafeReplace(this string input, string find, string replace, bool matchWholeWord)
    {
        string textToFind = matchWholeWord ? string.Format(@"\b{0}\b", find) : find;
        return Regex.Replace(input, textToFind, replace);
    }
}

用法：

Usage:

  string text = "Add Additional String to text box";
  string result = text.SafeReplace("Add", "Insert", true);

结果是：插入附加字符串文本框中输入

result: "Insert Additional String to text box"

如何搜索和替换只有精确匹配的字符串

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