Question

我想知道是否可以在收到PayPal捐款时执行SQL查询。

流程如下：

用户捐赠给PayPal帐户。
SQL插入/更新奖励给捐赠者。

就像在一些MMORPG中一样。你支付得分。

Answer 1

是的，您可以设置PayPal即时付款通知（IPN）这将允许您为收到的每笔付款运行脚本。 See Here。

要在项目中安装C＃SDK作为依赖项，请运行以下nuget命令。

nuget install PayPalRestApiSDK

Answer 2

您可以构建一个表单来在PayPal上设置这样的付款......

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick"> 
<input type="hidden" name="business" value="your@email-registered-with-paypal.com">
<input type="hidden" name="notify_url" value="http://yourdomain.com/notifypage.aspx">
<input type="hidden" name="invoice" value="{username or similar}">
<input type="hidden" name="item_name" value="Donation">  
<input type="hidden" name="item_number" value="1">  
<input type="hidden" name="amount" value="9.00">  
<input type="hidden" name="currency_code" value="USD">  
<input type="hidden" name="bn" value="PP-BuyNowBF">  
<input type="image" src="https://www.paypal.com/en_AU/i/btn/btn_buynow_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online.">
</form>

成功付款后，将从PayPal服务器调用notify_url并回发信息，包括您在表单中指定的发票号。

在Page_Load（）方法的notifypage.aspx中，您需要验证帖子来自PayPal，然后阅读发布的表单变量并相应地更新您的数据库，使用发票值将付款与您的用户相匹配数据库。像...这样的东西。

protected void Page_Load(object sender, EventArgs e)
{
    //Post back to either sandbox or live
    string strSandbox = "https://www.sandbox.paypal.com/cgi-bin/webscr";
    string strLive = "https://www.paypal.com/cgi-bin/webscr";
    HttpWebRequest req = (HttpWebRequest)WebRequest.Create(strSandbox);

    //Set values for the request back
    req.Method = "POST";
    req.ContentType = "application/x-www-form-urlencoded";
    byte[] param = Request.BinaryRead(HttpContext.Current.Request.ContentLength);
    string strRequest = Encoding.ASCII.GetString(param);
    strRequest += "&cmd=_notify-validate";
    req.ContentLength = strRequest.Length;

    //Send the request to PayPal and get the response
    StreamWriter streamOut = new StreamWriter(req.GetRequestStream(),                         System.Text.Encoding.ASCII);
    streamOut.Write(strRequest);
    streamOut.Close();
    StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
    string strResponse = streamIn.ReadToEnd();
    streamIn.Close();

    if (strResponse == "VERIFIED")
    {
    //check the payment_status is Completed
    //check that txn_id has not been previously processed
    var userName = Request["invoice"];
    //update database
    }
    else if (strResponse == "INVALID")
    {
    //log for manual investigation
    }
    else
    {
    //log response/ipn data for manual investigation
    }
}

}

发回的表单值列在https://developer.paypal.com/webapps/developer/docs/classic/ipn/integration-guide/IPNandPDTVariables/

可以在https://www.paypal.com/uk/cgi-bin/webscr?cmd=p/acc/ipn-info-outside

找到更多信息

收到Paypal付款，执行SQL查询

2 个答案: