Question

asp.net 字符串修改

例如：string a=asdfghhh; string b=asd; string c=eeee;
if (a.Contains(b)) { //怎样实现，若匹配 就把字符串c加到a中，但c要替换匹配字符后的长度等于c的一段字符 }
结果：a=asdeeeeh
如何实现啊 求帮助

Answer 1

string a = "asdfghhh"; string b = "asd"; string c = "eeee";
if (a.Contains(b))
{
if (c.Length <= a.Replace(b, "").Length)
{
string d = b + c;
int x = a.Length - d.Length;
d = d + a.Substring(a.Length - x, x);
textBox1.Text = d;
}
else
{
string d = b + c.Substring(0, a.Length);
}
}
这样可好，d就是你要的值

Answer 2

string a="asdfghhhasd11113asd546546";
string b="asd";
string c="eeee";
string result = "";
while(a.Contains(b))
{
result += a.Substring(0, a.IndexOf(b)) + a.Substring(a.IndexOf(b), b.Length) + c;
a=a.Substring(a.IndexOf(b)+b.Length+c.Length);
}