C# 截取字符串的问题解求

[hb_bigsea]

如下有一串字符:
"aaa,bbb,cccc,abcd 100,dddd,eeee,200,ffff"

最终想用C#截取后得到 "aaa,bbb,cccc,200,ffff"

截取的条件为
以100前一个逗号起点, 以200前一个逗号为结束点(100和200在该字符中是绝对存在的,并且前面均有逗号)去掉中间部分.

想截取后得到值为"aaa,bbb,cccc,200,ffff"


还请达人赐教,给出具体方法.

[宝_爸]

不难啊，都是基本的字符串操作。

string dest = "aaa,bbb,cccc,abcd 100,dddd,eeee,200,ffff";
int pos100 = dest.LastIndexOf(",", dest.IndexOf("100"));
int pos200 = dest.LastIndexOf(",", dest.IndexOf("200"));
if (((pos100 == -1) || (pos200 == -1))
|| (pos200 <= pos100))
{
throw new Exception("string doesn't include 100 or 200, or 200 is before 100");
}

string res = dest.Substring(0, pos100) + dest.Substring(pos200, dest.Length - pos200);

最后res是aaa,bbb,cccc,200,ffff

[pt1314917]

string msg = "aaa,bbb,cccc,abcd 100,dddd,eeee,200,ffff";
        string qmsg = msg.Substring(0, msg.IndexOf("100,"));
        msg = qmsg.Substring(0, qmsg.LastIndexOf(",") + 1) + msg.Substring(msg.LastIndexOf("200,"));

[amwsse21q]

            string Item = "aaa,bbb,cccc,abcd 100,dddd,eeee,200,ffff";
            int a = Item.LastIndexOf("abcd 100");
            int b = Item.LastIndexOf("200");
            MessageBox.Show(Item.Substring(0, a) + Item.Substring(b, Item.Length - b));

[scy251147]

mark

[xiangweixing]

string src = "aaa,bbb,cccc,abcd 100,dddd,eeee,200,ffff";
string head = msg.Substring(0, msg.IndexOf("100,"));
string des = head + msg.Substring(msg.LastIndexOf("200,"));

[birdlonger]

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication4
{
class Program
{
static void Main(string[] args)
{
string src = "aaa,bbb,cccc,abcd 100,dddd,eeee,200,ffff";
string src100 = src.Substring(0, src.IndexOf("100"));
string src200 = src.Substring(src.IndexOf("200"));
string strlast = src100.Substring(0, src100.LastIndexOf(',')+1) + src200;
Console.WriteLine(strlast);
Console.ReadLine();

}
}
}

[ctan]

前面回贴好象都不能达到要求, 试试看:

string src = "aaa,bbb,cccc,abcd 100,dddd,eeee,200,ffff";
string temp1 = src.Substring(0, src.IndexOf("100"));
temp1 = temp1.Substring(0,temp1.LastIndexOf(","));
string temp2 = src.Substring(0,src.IndexOf("200"));
temp2 = src.Substring(temp2.LastIndexOf(","));
string des = temp1 + temp2;

[hb_bigsea]

都写对了，怎么就是我不会写，郁闷　看来我不是做这个的料，得转行了．分大家分了吧．