C#操作Url参数 - 爱码网

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* Function:C#操作Url参数
* Author:Robot.H
* Created:20081117
---------------------------------------*/
using System;
using System.Text.RegularExpressions;
using System.Runtime.Remoting.Contexts;
class app
{
    static void Main()
    {
        //生成random
        Random rand = new Random(Environment.TickCount);
        int num = rand.Next(1, 10000);

        /*
       * http://news.sina.com.cn
       * http://news.sina.com.cn?page=1
       * http://news.sina.com.cn?page=1&ts=1341                            &&
       * http://news.sina.com.cn?ts=14321&page=1                        ?&
       * http://news.sina.com.cn?u=2&ts=14321&page=1                        &&
       */
        string url = "http://news.sina.com.cn?u=2&ts=14321&page=1";
        string ParamText = "ts";
        string ParamValue = num.ToString();
        Console.WriteLine(BuildUrl( url,  ParamText,  ParamValue));
        Console.Read();

    }
    //url里有key的值，就替换为value,没有的话就追加 C#操作Url参数

.
    public static string BuildUrl(string url, string ParamText, string ParamValue)
    {
        Regex reg = new Regex(string.Format("{0}=[^&]*",ParamText),RegexOptions.IgnoreCase);
        Regex reg1 = new Regex("[&]{2,}", RegexOptions.IgnoreCase);
        string _url = reg.Replace(url, "");
        //_url = reg1.Replace(_url, "");
        if (_url.IndexOf("?") == -1)
            _url += string.Format("?{0}={1}",ParamText,ParamValue);//?
        else
            _url += string.Format("&{0}={1}", ParamText, ParamValue);//&
        _url = reg1.Replace(_url, "&");
        _url = _url.Replace("?&", "?");
        return _url;
    }