/// <summary>/// 微信支付接口/// </summary>public interface ITenPayApi{      /// <summary>/// 生成扫描支付模式一URL/// </summary>/// <param name="productId">商品ID</param>/// <returns></returns>string GetPrePayUrl(string productId);/// <summary>/// 生成直接支付url，支付url有效期为2小时,模式二/// </summary>/// <param name="info">商品订单数据</param>/// <returns></returns>string GetPayUrl(WxPayOrderData info);/// <summary>/// 统一下单。（不需要证书,默认不需要）/// 除被扫支付场景以外，商户系统先调用该接口在微信支付服务后台生成预支付交易单，/// 返回正确的预支付交易回话标识后再按扫码、JSAPI、APP等不同场景生成交易串调起支付。/// </summary>/// <param name="info">商品订单数据</param>WxPayData UnifiedOrder(WxPayOrderData info);.............

    /// <summary>/// 统一下单的商品订单信息/// </summary>public class WxPayOrderData{/// <summary>/// 商品ID, trade_type=NATIVE，此参数必传/// </summary>public string product_id { get; set; }/// <summary>/// 商品或支付单简要描述/// </summary>public string body { get; set; }/// <summary>/// 订单总金额，单位为分/// </summary>public int total_fee { get; set; }/// <summary>/// 商品标记，代金券或立减优惠功能的参数，说明详见代金券或立减优惠/// </summary>public string goods_tag { get; set; }/// <summary>/// 交易类型,默认为:NATIVE。/// JSAPI--公众号支付、NATIVE--原生扫码支付、APP--app支付/// </summary>public string trade_type { get; set; }/// <summary>/// 商品名称明细列表/// </summary>public string detail { get; set; }/// <summary>/// 附加数据/// 在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据/// </summary>public string attach { get; set; }/// <summary>/// 用户标识/// trade_type=JSAPI，此参数必传，用户在商户appid下的唯一标识。/// </summary>public string openid { get; set; }public WxPayOrderData(){this.trade_type = "NATIVE";}}

    public class WxPayData{//采用排序的Dictionary的好处是方便对数据包进行签名，不用再签名之前再做一次排序private SortedDictionary<string, object> m_values = new SortedDictionary<string, object>();/// <summary>/// 默认构造函数/// 如果initDefault为true，则自动填入字段（appid,mch_id,time_stamp,nonce_str,out_trade_no,）/// </summary>public WxPayData(bool initDefault = false){if(initDefault){Init();}}/// <summary>/// 对象初始化后，自动填入字段（appid,mch_id,time_stamp,nonce_str,out_trade_no,）/// </summary>public void Init(){//初始化几个参数this.SetValue("appid", WxPayConfig.APPID);//公众帐号idthis.SetValue("mch_id", WxPayConfig.MCHID);//商户号this.SetValue("nonce_str", GenerateNonceStr());//随机字符串this.SetValue("out_trade_no", GenerateOutTradeNo(WxPayConfig.MCHID));//随机字符串}

        /// <summary>/// 统一下单。（不需要证书,默认不需要）/// 除被扫支付场景以外，商户系统先调用该接口在微信支付服务后台生成预支付交易单，/// 返回正确的预支付交易回话标识后再按扫码、JSAPI、APP等不同场景生成交易串调起支付。/// </summary>/// <param name="info">商品订单数据</param>public WxPayData UnifiedOrder(WxPayOrderData info){WxPayData data = new WxPayData(true);data.SetValue("product_id", info.product_id);//商品IDdata.SetValue("openid", info.openid);//商品ID//其他信息data.SetValue("body", info.body);//商品描述data.SetValue("attach", info.attach);//附加数据data.SetValue("total_fee", info.total_fee);//总金额data.SetValue("goods_tag", info.goods_tag);//商品标记data.SetValue("trade_type", info.trade_type);//交易类型//默认构建data.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));//交易起始时间data.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss"));//交易结束时间..............

            string url = "https://api.mch.weixin.qq.com/pay/unifiedorder";return GetPostResult(data, url);

        /// <summary>/// 通用的获取结果函数/// </summary>private WxPayData GetPostResult(WxPayData data, string url){string xml = data.ToXml();string response = helper.GetHtml(url, xml, true);WxPayData result = new WxPayData();result.FromXml(response);return result;}   

        /// <summary>/// 生成直接支付url，支付url有效期为2小时,模式二/// </summary>/// <param name="info">商品订单数据</param>/// <returns></returns>public string GetPayUrl(WxPayOrderData info){WxPayData result = UnifiedOrder(info);//调用统一下单接口return result.GetString("code_url");//获得统一下单接口返回的二维码链接}

        private void btnGetPayUrl_Click(object sender, EventArgs e){//测试扫码模式二的生成二维码方式WxPayOrderData data = new WxPayOrderData(){product_id = "123456789",body = "测试支付-模式二",attach = "爱奇迪技术支持",detail = "测试扫码支付-模式二",total_fee = 1,goods_tag = "test1"};var url = api.GetPayUrl(data);var image = api.GenerateQRImage(url);this.imgGetPayUrl.Image = image;this.imgGetPayUrl.SizeMode = PictureBoxSizeMode.StretchImage;}

        /// <summary>/// 生成扫描支付模式一URL/// </summary>/// <param name="productId">商品ID</param>/// <returns></returns>public string GetPrePayUrl(string productId){WxPayData data = new WxPayData(true);data.SetValue("product_id", productId);//商品ID     data.SetValue("time_stamp", data.GenerateTimeStamp());//随机字符串         data.SetValue("sign", data.MakeSign());//签名string str = data.ToUrlParams();//转换为URL串string url = "weixin://wxpay/bizpayurl?" + str;return url;}

        private void btnGetPrePayUrl_Click(object sender, EventArgs e){var productId = "12345678";var url = api.GetPrePayUrl(productId);var image = api.GenerateQRImage(url);this.imgGetPrePayUrl.Image = image;this.imgGetPayUrl.SizeMode = PictureBoxSizeMode.StretchImage;}

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server"><meta http-equiv="content-type" content="text/html;image/gif;charset=utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1" /> <title>微信支付样例-扫码支付</title>
</head>
<body><div style="margin-left: 10px;color:#00CD00;font-size:30px;font-weight: bolder;">扫码支付模式一</div><br/><asp:Image ID="Image1" runat="server" style="width:200px;height:200px;"/><br/><br/><br/><div style="margin-left: 10px;color:#00CD00;font-size:30px;font-weight: bolder;">扫码支付模式二</div><br/><asp:Image ID="Image2" runat="server" style="width:200px;height:200px;"/></body>
</html>

        protected void Page_Load(object sender, EventArgs e){TenPayApi api = new TenPayApi();var productId = "123456789";//生成扫码支付模式一urlstring url1 = api.GetPrePayUrl(productId);//生成扫码支付模式二urlWxPayOrderData info = new WxPayOrderData(){product_id = "123456789",body = "测试支付-模式二",attach = "爱奇迪技术支持",detail = "测试扫码支付-模式二",total_fee = 1,goods_tag = "test1"};string url2 = api.GetPayUrl(info);//将url生成二维码图片Image1.ImageUrl = "MakeQRCode.aspx?data=" + HttpUtility.UrlEncode(url1);Image2.ImageUrl = "MakeQRCode.aspx?data=" + HttpUtility.UrlEncode(url2);}