企业微信小程序支付流程

• 企业微信小程序支付流程
  • 前提准备
  • 创建生成二维码的工具类
  • 添加相关小程序信息
  • 支付与通知

前提准备

首先企业结合上一篇文章，开通企业级Native支付。
可点开这个链接进行申请开通：https://pay.weixin.qq.com/index.php/extend/product/lists?tid=3

创建生成二维码的工具类

首先安装ZXing.Net和ZXing.Net.Bindings.Windows.Compatibility两个包。

<PackageReference Include="ZXing.Net" Version="0.16.9" />
<PackageReference Include="ZXing.Net.Bindings.Windows.Compatibility" Version="0.16.12" />

创建根据字符串生成二维码的工具类

public static class QRCodeHelper
{
    public static void GenerateQRCode(string link,string path)
    {
        var writer = new BarcodeWriter<Bitmap>();
        writer.Format = BarcodeFormat.QR_CODE;
        QrCodeEncodingOptions options = new QrCodeEncodingOptions()
        {
            DisableECI = true,       //设置内容编码
            CharacterSet = "UTF-8",  //设置二维码的宽度和高度
            Width = 200,
            Height = 200,
            Margin = 1               //设置二维码的边距,单位不是固定像素
        };
        var render = new AlternateBitmapRenderer();
        writer.Renderer = render;
        writer.Options = options;
        Bitmap map = writer.Write(link);
        map.Save(path);
    }
}

添加相关小程序信息

在appsettings.json中添加小程序相关信息。

"WechatNativeOptions": {
  "Accounts": [
    {
      "AppId": "你的appid",
      "AppSecret": "相关secret"
    }
  ],
  "SucceedNotifyUrl": "接收通知的地址"
}

在OptionTenpays目录下创建WechatNativeOptions类实例。

public partial class WechatNativeOptions : IOptions<WechatNativeOptions>
{
    WechatNativeOptions IOptions<WechatNativeOptions>.Value => this;
    public Types.WechatAccount[] Accounts { get; set; } = Array.Empty<Types.WechatAccount>();
    public string SucceedNotifyUrl { get; set; } = string.Empty;
}
public partial class WechatNativeOptions
{
    public static class Types
    {
        public class WechatAccount
        {
            public string AppId { get; set; } = string.Empty;
            public string AppSecret { get; set; } = string.Empty;
        }
    }
}

创建请求的金额实例

/// <summary>
/// 请求的金额
/// </summary>
public class CreateOrderByNativeRequest
{
    public int Amount { get; set; }
}

在Program中注入生成二维码对应的小程序信息的类型。

builder.Services.Configure<WechatNativeOptions>(builder.Configuration.GetSection(nameof(WechatNativeOptions)));

支付与通知

[HttpPost]
[Route("nativeweb2")]
public async Task<IActionResult> CreateOrderByNativeWeb2([FromBody] Models.CreateOrderByNativeRequest requestModel)
{
    //读取微信支付配置文件
    var tenpayAccountOptions = _wechatnativeOptions.Accounts?.FirstOrDefault();
    var tenpayOptions = _tenpayOptions.Merchants?.FirstOrDefault();
    var client = _wechatTenpayClientFactory.Create(tenpayOptions.MerchantId);
    var request = new CreatePayTransactionNativeRequest()
    {
        OutTradeNumber = "SAMPLE_OTN_" + DateTimeOffset.Now.ToString("yyyyMMddHHmmssfff"),
        AppId = tenpayAccountOptions.AppId,
        Description = "演示订单",
        NotifyUrl = _tenpayOptions.SucceedNotifyUrl,
        Amount = new CreatePayTransactionNativeRequest.Types.Amount() { Total = requestModel.Amount }
    };
    var response = await client.ExecuteCreatePayTransactionNativeAsync(request, cancellationToken: HttpContext.RequestAborted);
    if (!response.IsSuccessful())
    {
        _logger.LogWarning(
            "Native 下单失败（状态码：{0}，错误代码：{1}，错误描述：{2}）。",
            response.GetRawStatus(), response.ErrorCode, response.ErrorMessage
        );
        return new JsonResult(response);
    }
    var guid = Guid.NewGuid().ToString()+".png";
    QRCodeHelper.GenerateQRCode(response.QrcodeUrl, Path.Combine(_wwwrootpath,"wwwroot", guid));
    var url = Request.Host.Value + "/" + guid;
    return Ok(url);
}

[HttpGet]
[Route("nativenotify")]
public IActionResult GetNativeNotify()
{
    var request = HttpContext.Request;
    var fulljsondata = JsonConvert.SerializeObject(request);
    // 这里可以添加更多的信息获取逻辑
    Console.WriteLine("数据获取:");
    Console.WriteLine(fulljsondata);
    // 返回请求的信息或者根据需要进行处理
    return Ok();
}