复制代码 代码如下:
public static string Replace(string source, string match, string replacement)
{
char[] sArr = source.ToCharArray();
char[] mArr = match.ToCharArray();
char[] rArr = replacement.ToCharArray();
int idx = IndexOf(sArr, mArr);
if (idx == -1)
{
return source;
}
else
{
return new string(sArr.Take(idx).Concat(rArr).Concat(sArr.Skip(idx + mArr.Length)).ToArray());
}
}
/// <summary>
/// 查找字符数组在另一个字符数组中匹配的位置
/// </summary>
/// <param name="source">源字符数组</param>
/// <param name="match">匹配字符数组</param>
/// <returns>匹配的位置，未找到匹配则返回-1</returns>
private static int IndexOf(char[] source, char[] match)
{
int idx = -1;
for (int i = 0; i < source.Length - match.Length; i++)
{
if (source[i] == match[0])
{
bool isMatch = true;
for (int j = 0; j < match.Length; j++)
{
if (source[i + j] != match[j])
{
isMatch = false;
break;
}
}
if (isMatch)
{
idx = i;
break;
}
}
}
return idx;
}