HttpRequest Get和Post调用其他页面的方法

  //get请求方式
    private string requestget(string url)
    {
        string pagestr = string.empty;//用于存放还回的html
        uri url = new uri(url);//uri类 提供统一资源标识符 (uri) 的对象表示形式和对 uri 各部分的轻松访问。就是处理url地址
        try
        {
            httpwebrequest httprequest = (httpwebrequest)webrequest.create(url);//根据url地址创建httpwebrequest对象
            #region 参数设置
            httprequest.method = "get";

            //---------------------------------------------设定一些参数（不必要可以）
            //httprequest.keepalive = false;//持久连接设置为false
            //httprequest.protocolversion = httpversion.version11;// 网络协议的版本
            //httprequest.proxy = webproxy.getdefaultproxy();//服务器代理
            //httprequest.contenttype = "application/x-www-form-urlencoded";//http 头
            //httprequest.allowautoredirect = true;
            //httprequest.maximumautomaticredirections = 10;
            //httprequest.timeout = 30000;//设定超时十秒（毫秒）
            //httprequest.useragent = "mozilla/4.0 (compatible; msie 6.0; windows nt 5.1)"; //浏览器
            //=================================================
            #endregion
            httpwebresponse response = (httpwebresponse)httprequest.getresponse();//使用httpwebresponse获取请求的还回值
            stream steam = response.getresponsestream();//从还回对象中获取数据流
            streamreader reader = new streamreader(steam, encoding.getencoding("gb2312"));//读取数据encoding.getencoding("gb2312")指编码是gb2312，不让中文会乱码的
            pagestr = reader.readtoend();
            reader.close();
        }
        catch (exception e)
        {
            pagestr += e.message;
        }
        return pagestr;
    }

//post请求方式，于get的方式写法相似，所以解释就些少一点了
 

  private string requestpost(string url,string context)//两个参数分别是url地址和post过去的数据
    {
        string pagestr=string.empty;
        uri url = new uri(url);
        byte[] reqbytes=encoding.ascii.getbytes(context);
        try
        {
            httpwebrequest req = (httpwebrequest)webrequest.create(url);
            req.method = "post";
            req.contenttype = "application/x-www-form-urlencoded";
            req.contentlength = reqbytes.length;
            stream stm = req.getrequeststream();
            stm.write(reqbytes, 0, reqbytes.length);

            stm.close();
            httpwebresponse wr = (httpwebresponse)req.getresponse();
            stream stream = wr.getresponsestream();
            streamreader srd= new streamreader(stream,encoding.getencoding("gb2312"));
            pagestr += srd.readtoend();
            stream.close();
            srd.close();
        }
        catch (exception e)
        {
            pagestr += e.message;
        }
        return pagestr;
    }

public string webclientget(string url)
        {
            var client = new webclient();
            client.headers.add("user-agent", "mozilla/4.0 (compatible; msie 6.0; windows nt 5.2; .net clr 1.0.3705;)");
            var stream = client.openread(url);
            if (stream == null) return "";
            var reader = new streamreader(stream, encoding.default);
            var result = reader.readtoend();
            stream.close();
            reader.close();
            return result;
        }