App_Code/HttpService.cs

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using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Net;
using System.Web;

/// <summary>
/// HttpService 的摘要说明
/// </summary>
public class HttpService
{

    public static string Get(string url)
    {
        using (WebClient c = new WebClient())
        {
            try
            {
                c.Encoding = System.Text.Encoding.UTF8;
                return c.DownloadString(url);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }


    public static string GetPost(string url, string parameters)
    {
        string ret = "";
        using (WebClient c = new WebClient())
        {
            try
            {
                c.Encoding = System.Text.Encoding.UTF8;
                byte[] data = System.Text.Encoding.UTF8.GetBytes(parameters);
                c.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
                c.Headers.Add("ContentLength", parameters.Length.ToString());
                ret = System.Text.Encoding.UTF8.GetString(c.UploadData(url, "POST", data));
                return ret;
            }
            catch (Exception)
            {
                throw;
            }
        }
    }


    public static string GetPost(string url, NameValueCollection nv)
    {
        using (WebClient c = new WebClient())
        {
            try
            {
                c.Encoding = System.Text.Encoding.UTF8;
                return System.Text.Encoding.UTF8.GetString(c.UploadValues(url, "POST", nv));