请教各位有关字符窜的截取问题?
/cc/web/File/20077171011481/new1.aspx
想得到 File/20077171011481 或/File/20077171011484/

[解决办法]

C# code

        string a = "/cc/web/File/20077171011481/new1.aspx";        int b = a.IndexOf("File");        int c = a.LastIndexOf("/");        Response.Write(a.Substring(b, c - b) + "<br>");// 输出结果是：File/20077171011481         Response.Write(a.Substring(b - 1, c - b + 2)); // 输出结果是：/File/20077171011481/
[解决办法]
还可以使用正则：
C# code
using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Text.RegularExpressions;public partial class Default13 : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {        string a = "/cc/web/File/20077171011481/new1.aspx";        string reg = @"File/\d{14}";        MatchCollection mc = Regex.Matches(a, reg);        foreach (Match m in mc)        {            Response.Write(m.Value);  // 输出结果是:File/20077171011481         }   }}