How To Get Category From Quickbooks Online Using C#

In this article, we will learn how to get a category 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 categories, 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 categories from Quickbooks online, code is as below.

 public ActionResult GetAllCategory()
{
  List<Item> ItemList = new List<Item>();
  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<Item> querySvc = new QueryService<Item>(serviceContext);
    ItemList = querySvc.ExecuteIdsQuery("select * from Item where Type='Category'").ToList();

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

• We will get a list of categories in the ItemList object.
• View Code is as below,

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

@{
    ViewBag.Title = "GetAllCategory";
}

<h2>GetAllCategory</h2>

<div>
    <table class="table table-bordered">
        <tr>
            <th>QBO ID</th>
            <th>Category Name</th>
        </tr>

        @foreach (var item in Model)
        {
            <tr>
                <td>@item.Id</td>
                <td>@item.Name</td>
            </tr>
        }

    </table>
</div>

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

string EXISTING_CATEGORY_QUERYBYNAME = string.Format("select * from Item where Name = '{0}' and Type='{1}'", "Electronics", "Category");
Item objItemFound = querySvc.ExecuteIdsQuery(EXISTING_CATEGORY_QUERYBYNAME).FirstOrDefault<Item>();

• It will return an item by Name which is Type of Category. or it will return Category by Name.
• we will get a Category which Name is “Electronics”.

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

Output: