先做最简单的公众号支付,也就是微信内支付。相关链接:公众号支付
大概就这样把,还算是比较简单的,前端发起支付有WeixinJSBridge的getBrandWCPayRequest 和 wx.choosewxpay 两种方法,似乎最开始是前者,然后变成后者,最后又发现前者好用,也不知道什么情况,反正以最新官网为准把。
获取OpenId方法类
public class Authentication
{
/// <summary>
/// openid用于调用统一下单接口
/// </summary>
public string openid { get; set; }
/// <summary>
/// access_token用于获取收货地址js函数入口参数
/// </summary>
public string access_token { get; set; }
/// <summary>
/// 重定向后会带上state参数,该项目用于记录跳转的URL
/// </summary>
public string state { get; set; }
/**
*
* 网页授权获取用户基本信息的全部过程
* 详情请参看网页授权获取用户基本信息:http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
* 第一步:利用url跳转获取code
* 第二步:利用code去获取openid和access_token
*
*/
public void GetOpenidAndAccessToken(Page page, string returnUrl = null)
{
if (!string.IsNullOrEmpty(page.Request.QueryString["code"]))
{
//获取code码,以获取openid和access_token
string code = page.Request.QueryString["code"];
//Log.Debug(this.GetType().ToString(), "Get code : " + code);
GetOpenidAndAccessTokenFromCode(code);
//获取state
state = page.Request.QueryString["state"];
}
else
{
//构造网页授权获取code的URL
string host = page.Request.Url.Host;
string path = page.Request.Path;
string redirect_uri = HttpUtility.UrlEncode("http://" + host + path);
WxPayData data = new WxPayData();
data.SetValue("appid", Config.AppID);
data.SetValue("redirect_uri", redirect_uri);
data.SetValue("response_type", "code");
data.SetValue("scope", "snsapi_base");
data.SetValue("state", returnUrl + "#wechat_redirect");
string url = "https://open.weixin.qq.com/connect/oauth2/authorize?" + data.ToUrl();
//Log.Debug(this.GetType().ToString(), "Will Redirect to URL : " + url);
try
{
//触发微信返回code码
page.Response.Redirect(url);//Redirect函数会抛出ThreadAbortException异常,不用处理这个异常
}
catch (System.Threading.ThreadAbortException ex)
{
}
}
}
/**
*
* 通过code换取网页授权access_token和openid的返回数据,正确时返回的JSON数据包如下:
* {
* "access_token":"ACCESS_TOKEN",
* "expires_in":7200,
* "refresh_token":"REFRESH_TOKEN",
* "openid":"OPENID",
* "scope":"SCOPE",
* "unionid": "o6_bmasdasdsad6_2sgVt7hMZOPfL"
* }
* 其中access_token可用于获取共享收货地址
* openid是微信支付jsapi支付接口统一下单时必须的参数
* 更详细的说明请参考网页授权获取用户基本信息:http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
* @失败时抛异常WxPayException
*/
public void GetOpenidAndAccessTokenFromCode(string code)
{
try
{
//构造获取openid及access_token的url
WxPayData data = new WxPayData();
data.SetValue("appid", Config.AppID);
data.SetValue("secret", Config.AppSecret);
data.SetValue("code", code);
data.SetValue("grant_type", "authorization_code");
string url = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data.ToUrl();
//请求url以获取数据
string result = HttpService.Get(url);
//Log.Debug(this.GetType().ToString(), "GetOpenidAndAccessTokenFromCode response : " + result);
JObject jd = JObject.Parse(result);
//获取access_token
access_token = (string)jd["access_token"];
//获取用户openid
openid = (string)jd["openid"];
//Log.Debug(this.GetType().ToString(), "Get openid : " + openid);
//Log.Debug(this.GetType().ToString(), "Get access_token : " + access_token);
}
catch (Exception ex)
{
//Log.Error(this.GetType().ToString(), ex.ToString());
throw new Exception(ex.ToString());
}
}
}
公众号支付方法类
public class JsApiPay
{
/**
* 调用统一下单,获得下单结果
* @return 统一下单结果
* @失败时抛异常WxPayException
*/
public WxPayData GetUnifiedOrderResult(UnifiedOrderModel unifiedOrderModel, string openid)
{
//统一下单
WxPayData data = new WxPayData();
data.SetValue("body", unifiedOrderModel.body);
data.SetValue("attach", unifiedOrderModel.attach);
data.SetValue("out_trade_no", unifiedOrderModel.out_trade_no);
data.SetValue("total_fee", unifiedOrderModel.total_fee);
data.SetValue("time_start", unifiedOrderModel.time_start);
data.SetValue("time_expire", unifiedOrderModel.time_expire);
data.SetValue("goods_tag", unifiedOrderModel.goods_tag);
//交易类型,JSAPI 公众号支付, NATIVE 扫码支付, APP APP支付
data.SetValue("trade_type", "JSAPI");
data.SetValue("openid", openid);
WxPayData result = WxPayApi.UnifiedOrder(data);
if (!result.IsSet("appid") || !result.IsSet("prepay_id") || result.GetValue("prepay_id").ToString() == "")
{
//Log.Error(this.GetType().ToString(), "UnifiedOrder response error!");
throw new Exception("UnifiedOrder response error!");
}
//unifiedOrderResult = result;
return result;
}
/**
*
* 从统一下单成功返回的数据中获取微信浏览器调起jsapi支付所需的参数,
* 微信浏览器调起JSAPI时的输入参数格式如下:
* {
* "appId" : "", //公众号名称,由商户传入
* "timeStamp":" 1395712654", //时间戳,自1970年以来的秒数
* "nonceStr" : "e61463f8efa94090b1f366cccfbbb444", //随机串
* "package" : "prepay_id=u802345jgfjsdfgsdg888",
* "signType" : "MD5", //微信签名方式:
* "paySign" : "70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名
* }
* @return string 微信浏览器调起JSAPI时的输入参数,json格式可以直接做参数用
* 更详细的说明请参考网页端调起支付API:http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7
*
*/
public WxPayData GetJsApiParameters(WxPayData unifiedOrderResult)
{
//Log.Debug(this.GetType().ToString(), "JsApiPay::GetJsApiParam is processing...");
WxPayData jsApiParam = new WxPayData();
jsApiParam.SetValue("appId", unifiedOrderResult.GetValue("appid"));
jsApiParam.SetValue("timeStamp", WxPayApi.GenerateTimeStamp());
jsApiParam.SetValue("nonceStr", WxPayApi.GenerateNonceStr());
jsApiParam.SetValue("package", "prepay_id=" + unifiedOrderResult.GetValue("prepay_id"));
jsApiParam.SetValue("signType", "MD5");
jsApiParam.SetValue("paySign", jsApiParam.MakeSign());
//Log.Debug(this.GetType().ToString(), "Get jsApiParam : " + parameters);
return jsApiParam;
}
/**
*
* 获取收货地址js函数入口参数,详情请参考收货地址共享接口:http://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_9
* @return string 共享收货地址js函数需要的参数,json格式可以直接做参数使用
*/
public string GetEditAddressParameters(string url, string access_token)
{
string parameter = "";
try
{
//string host = page.Request.Url.Host;
//string path = page.Request.Path;
//string queryString = page.Request.Url.Query;
////这个地方要注意,参与签名的是网页授权获取用户信息时微信后台回传的完整url
//string url = "http://" + host + path + queryString;
//构造需要用SHA1算法加密的数据
WxPayData signData = new WxPayData();
signData.SetValue("appid", Config.AppID);
signData.SetValue("url", url);
signData.SetValue("timestamp", WxPayApi.GenerateTimeStamp());
signData.SetValue("noncestr", WxPayApi.GenerateNonceStr());
signData.SetValue("accesstoken", access_token);
string param = signData.ToUrl();
//Log.Debug(this.GetType().ToString(), "SHA1 encrypt param : " + param);
//SHA1加密
string addrSign = FormsAuthentication.HashPasswordForStoringInConfigFile(param, "SHA1");
//Log.Debug(this.GetType().ToString(), "SHA1 encrypt result : " + addrSign);
//获取收货地址js函数入口参数
WxPayData afterData = new WxPayData();
afterData.SetValue("appId", Config.AppID);
afterData.SetValue("scope", "jsapi_address");
afterData.SetValue("signType", "sha1");
afterData.SetValue("addrSign", addrSign);
afterData.SetValue("timeStamp", signData.GetValue("timestamp"));
afterData.SetValue("nonceStr", signData.GetValue("noncestr"));
//转为json格式
parameter = afterData.ToJson();
//Log.Debug(this.GetType().ToString(), "Get EditAddressParam : " + parameter);
}
catch (Exception ex)
{
//Log.Error(this.GetType().ToString(), ex.ToString());
throw new Exception(ex.ToString());
}
return parameter;
}
}
获取OpenId的中间页cs代码
public partial class WCAuth : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Authentication wcAuth = new Authentication();
try
{
//Encode后的URL
string returnUrl = this.Request.QueryString["returnUrl"];
//调用【网页授权获取用户信息】接口获取用户的openid和access_token
wcAuth.GetOpenidAndAccessToken(this, returnUrl);
Session["openid"] = wcAuth.openid;
Session["access_token"] = wcAuth.access_token;
if (!string.IsNullOrWhiteSpace(wcAuth.state))
{
wcAuth.state = HttpUtility.UrlDecode(wcAuth.state);
this.Response.Redirect(wcAuth.state);
}
}
catch (Exception)
{
Response.Write("<span style='color:#FF0000;font-size:20px'>" + "页面加载出错,请重试" + "</span>");
}
}
}
}
function jsApiPay() {
$.ajax({
type: "post",
url: "url",
dataType: "json",
data: {
"method": "GetJsApiParameters",
"body": $("#body").val(),
"attach": $("#attach").val(),
"out_trade_no": $("#out_trade_no").val(),
"total_fee": $("#total_fee").val(),
"goods_tag": $("#goods_tag").val()
},
success: function (data) {
var item = eval(data); //转换成json对象访问
alert(data.package);
jsApiCall(data);
return;
}
});
}
//调用微信JS api 支付
function jsApiCall(data) {
WeixinJSBridge.invoke(
'getBrandWCPayRequest', {
"appId": data.appId, //公众号名称,由商户传入
"timeStamp": data.timeStamp, //时间戳,自1970年以来的秒数
"nonceStr": data.nonceStr, //随机串
"package": data.package,
"signType": data.signType, //微信签名方式:
"paySign": data.paySign //微信签名
},
function (res) {
WeixinJSBridge.log(res.errMsg);
alert(res.errCode + res.errDesc + res.errMsg);
alert(res.err_code + res.err_desc + res.err_msg);
if (res.err_msg == "get_brand_wcpay_request:ok") {
// 使用以上方式判断前端返回,微信团队郑重提示:
//res.err_msg将在用户支付成功后返回ok,但并不保证它绝对可靠。
alert("微信支付成功!");
//TODO:自行调用OrderQuery判断状态
} else if (res.err_msg == "get_brand_wcpay_request:cancel") {
alert("用户取消支付!");
} else {
alert("支付失败!");
}
}
);
}
function callpay() {
if (typeof WeixinJSBridge == "undefined") {
if (document.addEventListener) {
document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
}
else if (document.attachEvent) {
document.attachEvent('WeixinJSBridgeReady', jsApiCall);
document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
}
}
else {
jsApiPay();
}
}
遇到几个经常出现的错误:
redirect_url参数错误 网页授权问题。进入微信公众平台,点击左侧菜单“接口权限”,在右侧“网页授权 ”中找到“网页授权获取用户基本信息”,点击最右侧的修改,把网址写进去即可,注意不要加http。
no permission to execute 微信支付的开发配置中的测试授权目录或授权目录没有设置正确,去微信支付那设置下就行
还有一个是什么什么permission来着,不记得了,反正就是支付页调用不起来,这个得在微信里面实际操作才行,PC端微信,微信开发者工具等等通通不行。