c# String删除两个字符之间的字符

Question

例如，我有一个字符串

"//RemoveFromhere
<div>
<p>my name is blawal i want to remove this div </p>
</div>
//RemoveTohere"

我想用//RemoveFromhere作为起点和//RemoveTohere作为我要删除的所有字符之间的结束点

Answer 1

var sin = "BEFORE//RemoveFromhere"+
"<div>"+
"<p>my name is blawal i want to remove this div </p>"+
"</div>"+
"//RemoveTohereAFTER";
const string fromId = "//RemoveFromhere";
const string toId = "//RemoveTohere";
var from = sin.IndexOf(fromId) + fromId.Length;
var to = sin.IndexOf(toId);
if (from > -1 && to > from)
Console.WriteLine(sin.Remove(from , to - from));
//OR to exclude the from/to tags
from = sin.IndexOf(fromId);
to = sin.IndexOf(toId) + toId.Length;
Console.WriteLine(sin.Remove(from , to - from));

得到BEFORE//RemoveFromhere//RemoveTohereAFTER和BEFOREAFTER

请参阅Cetin Basoz在接受此答案后添加的更通用(更好)的正则表达式选项。

Answer 2

void Main()
{
string pattern = @"n{0,1}//RemoveFromhere(.|n)*?//RemoveToheren{0,1}";
var result = Regex.Replace(sample, pattern, "");
Console.WriteLine(result);
}
static string sample = @"Here
//RemoveFromhere
<div>
<p>my name is blawal i want to remove this div </p>
</div>
//RemoveTohere
Keep this.
//RemoveFromhere
<div>
<p>my name is blawal i want to remove this div </p>
</div>
//RemoveTohere
Keep this too.
";