短信发送程序

1. 先在中国网建注册账户
2. 明确用户名和 密钥
3. 创建一个c#的Windows窗体应用程序
4. 
   创建类

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace asms
{
  public   class zzq
    {
        private string THE_UID = "zzzq"; //用户名
        private string THE_KEY = "d41d8cd98f00b204e980"; //接口秘钥
        public void Phone(string number, string smsText)
        {


            string PostUrl = GetPostUrl(number, smsText);

            string result = PostSmsInfo(PostUrl);

            string t = GetResult(result);
            MessageBox.Show(GetResult(result));
        }
        public string GetPostUrl(string smsMob, string smsText)
        {
            string postUrl = "http://utf8.api.smschinese.cn/?Uid=" + THE_UID + "&key=" + THE_KEY + "&smsMob=" + smsMob + "&smsText=" + smsText;
            return postUrl;
        }
        public string PostSmsInfo(string url)
        {
            //调用时只需要把拼成的URL传给该函数即可。判断返回值即可
            string strRet = null;

            if (url == null || url.Trim().ToString() == "")
            {
                return strRet;
            }
            string targeturl = url.Trim().ToString();
            try
            {
                HttpWebRequest hr = (HttpWebRequest)WebRequest.Create(targeturl);
                hr.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
                hr.Method = "GET";
                hr.Timeout = 30 * 60 * 1000;
                WebResponse hs = hr.GetResponse();
                Stream sr = hs.GetResponseStream();
                StreamReader ser = new StreamReader(sr, Encoding.Default);
                strRet = ser.ReadToEnd();
            }
            catch (Exception ex)
            {
                strRet = null;
            }
            return strRet;
        }
        public string GetResult(string strRet)
        {
            int result = 0;
            try
            {
                result = int.Parse(strRet);
                switch (result)
                {
                    case -1:
                        strRet = "没有该用户账户";
                        break;
                    case -2:
                        strRet = "接口密钥不正确,不是账户登陆密码";
                        break;
                    case -21:
                        strRet = "MD5接口密钥加密不正确";
                        break;
                    case -3:
                        strRet = "短信数量不足";
                        break;
                    case -11:
                        strRet = "该用户被禁用";
                        break;
                    case -14:
                        strRet = "短信内容出现非法字符";
                        break;
                    case -4:
                        strRet = "手机号格式不正确";
                        break;
                    case -41:
                        strRet = "手机号码为空";
                        break;
                    case -42:
                        strRet = "短信内容为空";
                        break;
                    case -51:
                        strRet = "短信签名格式不正确,接口签名格式为：【签名内容】";
                        break;
                    case -6:
                        strRet = "IP限制";
                        break;
                    default:
                        strRet = "发送短信数量：" + result;
                        break;
                }
            }
            catch (Exception ex)
            {
                strRet = ex.Message;
            }
            return strRet;
        }
    }
}

窗体后台代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace asms
{
    public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string a = textBox1.Text;
            string b = textBox2.Text;
            zzq c = new zzq();
            c.Phone(a, b);
        }
    }
}