How To Get Invoices From Quickbooks Online Using C#

In this article, we will learn how to get invoices from Quickbooks online in .NET MVC web application using SDK.

Before using any Quickbooks online API we need access token, if you don’t know how to get access token then you can find it here.

• First, we have to create a ServiceContext with Auth tokens and realmId.
• For that, we need access token and realmId
• For getting invoices, we have to define a QueryService object.
• QueryService object needs a ServiceContext object as parameter.
• So we have to create a Quickbooks QueryService using ServiceContext.
• Here we are getting all invoice from Quickbooks online, code is as below.

public ActionResult GetAllInvoice()
{
  List<Invoice> InvoiceList = new List<Invoice>();
  try
  {
    OAuth2RequestValidator oauthValidator = new OAuth2RequestValidator(Access_token);
    // Create a ServiceContext with Auth tokens and realmId
    ServiceContext serviceContext = new ServiceContext(RealmId, IntuitServicesType.QBO, oauthValidator);
    serviceContext.IppConfiguration.MinorVersion.Qbo = "23";
    serviceContext.IppConfiguration.BaseUrl.Qbo = QboBaseUrl;

    // Create a QuickBooks QueryService using ServiceContext
    QueryService<Invoice> querySvc = new QueryService<Invoice>(serviceContext);
    InvoiceList = querySvc.ExecuteIdsQuery("SELECT * FROM Invoice").ToList();

    return View(InvoiceList);
  }
  catch (IdsException ex)
  {
    return View(InvoiceList);
  }
  catch (Exception ex)
  {
    return View(InvoiceList);
  }
}

• We will get all the Invoice list in the InvoiceList object.
• View Code is as below,

@model List<Intuit.Ipp.Data.Invoice>

    @{
        ViewBag.Title = "GetAllInvoice";
    }

    <h2>Quickbooks online Invoice List</h2>

    <div>
        <table class="table table-bordered">
            <tr>
                <th>QBO ID</th>
                <th>Invoice Number</th>
                <th>Invoice Date</th>
                <th>Customer</th>
                <th>Total Amount</th>
            </tr>

            @foreach (var item in Model)
            {
                <tr>
                    <td>@item.Id</td>
                    <td>@item.DocNumber</td>
                    <td>@item.TxnDate.ToString("MM/dd/yyyy")</td>
                    <td>@item.CustomerRef.name</td>
                    <td>@item.TotalAmt</td>
                </tr>
            }

        </table>
    </div>

• We can also write a query according to our requirements, as like below

string EXISTING_INVOICE_QUERYBYID = string.Format("select * from Invoice where id = '{0}'", "147");
Invoice objInvoiceFound = queryService.ExecuteIdsQuery(EXISTING_INVOICE_QUERYBYID).FirstOrDefault<Invoice>();

• it will return an Invoice by id.
• We will get an Invoice which id=”147” in the objInvoiceFound object.

So that’s how we can get Invoices or query Invoices from Quickbooks online.

Output: