.NET开发微信小程序-生成二维码 - 转

1.生成小程序二维码功能

直接请求相应的链接。传递相应的参数

以生成商铺的付款码为例：

var shopsId = e.ShopsId
//付款码的参数
var codeModel = new function () { }
codeModel.path = "pages/PageWxPay/PageWxPay?shopsId=" + shopsId
codeModel.width = 430
codeModel.auto_color = false
codeModel.line_color = { "r": "0", "g": "0", "b": "0" }
var data = {
shopsID: shopsId,
data: JSON.stringify(codeModel)
}
console.log(data)
api.RequestApiURL("Weixin/MyPaymentCode", data, function (codeData) {
console.log(codeData)
var obj = codeData.data.data
if (obj.Key == "0") {
that.setData({
payCodeUrl: app.globalData.apiurl + obj.Value
})
wx.hideLoading()
}
else {
wx.showToast({ title: obj.Value })
}
})

后台代码处理

private static object obj = new object();
/// <summary>
/// 创建二维码
/// 接口A: 适用于需要的码数量较少的业务场景 接口地址：
/// 接口B：适用于需要的码数量极多，或仅临时使用的业务场景
/// 接口C：适用于需要的码数量较少的业务场景
/// </summary>
/// <param name="data">前台传递的数据</param>
/// <param name="path">图片存储位置</param>
/// <param name="toKen"></param>
/// <returns></returns>
public static bool CreateWxaqrCode(Utils.QrCodeType nType, string data, string path, string toKen, out string ExcaptionMassage)
{
ExcaptionMassage = "";
bool msg = false;
string url = string.Empty;
switch (nType)
{
case Utils.QrCodeType.A:
url = "https://api.weixin.qq.com/wxa/getwxacode?access_token={0}";
break;
case Utils.QrCodeType.B:
url = "http://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token={0}";
break;
case Utils.QrCodeType.C:
url = "https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token={0}";
break;

}
url = string.Format(url, toKen);
lock (obj)
{
//判断当前用户是否生成二微码
if (!System.IO.File.Exists(path))
{
try
{
//获取数据流
Stream str = Request.PostMoths(url, data);

byte[] by = Utils.StreamToBytes(str);

Utils.PreservationCodeImage(path, by);
//保存该文件
msg = true;
}
catch(Exception e)
{
ExcaptionMassage= e.Message;
msg = false;//出现异常
}
}
}
return msg;
}

注：PostMoths方法在小程序基础配置里面有

StreamToBytes方法和PreservationCodeImage方法在支付里面有