C# Requires Chilkat v11.0.0+

PayPal: List merchant invoices across pages

See more PayPal Examples

List invoices for the authenticated merchant. Request totals, iterate every page, and keep the PayPal ID alongside the human-readable number and current status.

PayPal documentation

C#

bool success = false;

//  See Unlock Chilkat before making requests.
//  For the merchant's internal backoffice application. Load the sandbox token
//  from the merchant's credential store. Keep it out of publicly distributed apps.
//  See Get a PayPal access token.
Chilkat.Http http = new Chilkat.Http();
http.AuthToken = "SANDBOX_ACCESS_TOKEN";
Chilkat.HttpResponse resp = new Chilkat.HttpResponse();

//  Request total_pages so a merchant with more than one page sees every invoice.
int page = 1;
int lastPage = 1;
while ((page <= lastPage)) {
    Chilkat.StringBuilder url = new Chilkat.StringBuilder();
    url.Append("https://api-m.sandbox.paypal.com/v2/invoicing/invoices?total_required=true&page_size=20&page=");
    url.AppendInt(page);
    success = http.HttpNoBody("GET",url.GetAsString(),resp);
    if (success != true) {
        Debug.WriteLine("No HTTP response: " + http.LastErrorText);
        return;
    }

    if ((resp.StatusCode < 200) || (resp.StatusCode >= 300)) {
        Chilkat.JsonObject errorInfo = new Chilkat.JsonObject();
        errorInfo.Load(resp.BodyStr);
        Debug.WriteLine("HTTP " + Convert.ToString(resp.StatusCode) + " " + errorInfo.StringOf("name") + " " + errorInfo.StringOf("details[0].issue"));
        Debug.WriteLine("PayPal debug ID: " + errorInfo.StringOf("debug_id"));
        return;
    }

    Chilkat.JsonObject result = new Chilkat.JsonObject();
    bool parsed = result.Load(resp.BodyStr);
    if (parsed != true) {
        Debug.WriteLine("Expected a JSON response; HTTP " + Convert.ToString(resp.StatusCode));
        return;
    }

    int i = 0;
    int count = result.SizeOfArray("items");
    while ((i < count)) {
        result.I = i;
        Debug.WriteLine(result.StringOf("items[i].id") + "  " + result.StringOf("items[i].detail.invoice_number") + "  " + result.StringOf("items[i].status"));
        i = i + 1;
    }

    lastPage = result.IntOf("total_pages");
    page = page + 1;
}