如何使用asp.net取消Paypal中的最后一个订阅

Question

Hi i am using recurring paypal subscription button that works perfectly.But i want to know the way to cancel last subscription of same user.

Explanation:

I have 1 user,3 users and 6 users plans.

I did the subscription part for all types now what i want:

lets say user change from one user to three users and go to payment screen to upgrade Will the last subscription will end automatically or not.

i found this code for cancel subscription:

<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_subscr-find&alias=SGGGX43FAKKXN">

this is the code i use for subscription button that works perfectly:

 protected void btnsubscribe_Click(object sender, EventArgs e)
{
    decimal amt = 0;
    if (ddlPlanType.SelectedValue.ToString() != "6")
    {
        amt = Convert.ToDecimal(ddlPlanType.SelectedValue);
    }
    else
    {
        int userNo = 0;
        if (txtusers.Text.Trim() != "")
            userNo = Convert.ToInt32(txtusers.Text);
        amt = Convert.ToDecimal(ddlPlanType.Items[2].Value) + Convert.ToDecimal(10.95 * userNo);
    }
    int qty = Convert.ToInt32(rdoplantype.SelectedValue);
    StringBuilder sb = new StringBuilder();
    sb.Append("business=" + ConfigurationManager.AppSettings["paypalemail"].ToString());
    sb.Append("&return=" + ConfigurationManager.AppSettings["SuccessURL"].ToString());
    sb.Append("&cancel_return=" + Server.UrlEncode(ConfigurationManager.AppSettings["FailedURL"].ToString()));
    sb.Append("&button_subtype=services&upload=1&no_note=1&rm=2");
    sb.Append("&currency_code=USD&cmd=_xclick-subscriptions&src=1&modify=0&item_number=Standard&p3=1");
    if (qty == 1)
    {
        Server.UrlEncode(sb.AppendFormat("&t3={0}",  "M").ToString());
        Server.UrlEncode(sb.AppendFormat("&a3={0}", amt).ToString());
    }
    else if (qty == 12)
    {

        Server.UrlEncode(sb.AppendFormat("&t3={0}",  "Y").ToString());
        Server.UrlEncode(sb.AppendFormat("&a3={0}", amt*12).ToString());
    }
    Server.UrlEncode(sb.AppendFormat("&item_name={0}", ddlPlanType.SelectedItem.Text + " " + txtusers.Text).ToString());
    Response.Redirect(ConfigurationManager.AppSettings["PayPalUrl"].ToString() + sb.ToString());
    Response.Redirect("Success.aspx");
}

Does this code works for cancel last subscription?

<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_subscr-find&alias=SGGGX43FAKKXN">

Thanks

Answer 1

The code does not actually cancel the subscription. This example was taken from the docuentation:

<A HREF="https://www.paypal.com/cgi-bin/webscr?cmd=_subscr-find&alias=alice%40mystore%2ecom"><IMG BORDER="0"SRC="https://www.paypalobjects.com/en_US/i/btn/btn_unsubscribe_LG.gif"></A>

It displays an "Unsubscribe" button image to the user that links to the subscription cancellation function on the PayPal website. the user must log into their PayPal account to continue. the email address or payer ID here:

cmd=_subscr-find&alias=alice%40mystore%2ecom

is identifying you as the subscription provider to be cancelled. they will have to click another "Unsubscribe" button here to complete the process.

Answer 2

<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_subscr-find&alias=SGGGX43FAKKXN">
    <img src="https://www.paypalobjects.com/en_US/i/btn/btn_unsubscribe_LG.gif" BORDER="0">
</a>

This HTML makes it very easy for us to create an Unsubscribe button and place it wherever we want. Before we can use this, though, we need to make one change to the href attribute. At the end of the URL for the href, you'll see alias=SGGGX43FAKKXN. This alias parameter is defined by PayPal as “the secure merchant account ID of the subscription provider's PayPal account. This value is in the My business info section of your PayPal account profile.” Replace the value SGGGX43FAKKXN with your own ID.