C# Requires Chilkat v11.0.0+

PayPal: Build a worklist of overdue invoices

See more PayPal Examples

Find open invoices due in the past 90 days, including partial payments. Walk all result pages and display the invoice number, due date, and remaining balance for the collections team.

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();
Chilkat.JsonObject body = new Chilkat.JsonObject();
body.UpdateString("status[0]","SENT");
body.UpdateString("status[1]","PARTIALLY_PAID");
body.UpdateString("status[2]","UNPAID");
body.UpdateString("status[3]","SHARED");
//  Yesterday is the last overdue date. Include invoices due in the past 90 days.
Chilkat.CkDateTime day = new Chilkat.CkDateTime();
day.SetFromCurrentSystemTime();
day.AddDays(-1);
body.UpdateString("due_date_range.end",day.GetAsIso8601("YYYY-MM-DD",false));
day.AddDays(-89);
body.UpdateString("due_date_range.start",day.GetAsIso8601("YYYY-MM-DD",false));
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/search-invoices?total_required=true&page_size=50&page=");
    url.AppendInt(page);
    success = http.HttpJson("POST",url.GetAsString(),body,"application/json",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 parsedResult = result.Load(resp.BodyStr);
    if (parsedResult != 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].detail.invoice_number") + "  due " + result.StringOf("items[i].detail.payment_term.due_date") + "  " + result.StringOf("items[i].due_amount.value")
             + " " + result.StringOf("items[i].due_amount.currency_code"));
        i = i + 1;
    }

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