(C#) QuickBooks - Query a Customer

Demonstrates how to query QuickBooks customers.

A sample JSON response body is available at Sample Quickbooks Customer Query JSON Response

For more information, see https://developer.intuit.com/app/developer/qbo/docs/api/accounting/all-entities/customer#query-a-customer

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Get our previously obtained OAuth2 access token, which should contain JSON like this:
// {
//   "expires_in": 3600,
//   "x_refresh_token_expires_in": 8726400,
//   "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
//   "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
//   "token_type": "bearer"
// }

Chilkat.JsonObject jsonToken = new Chilkat.JsonObject();
bool success = jsonToken.LoadFile("qa_data/tokens/qb-access-token.json");

Chilkat.Rest rest = new Chilkat.Rest();

// Connect using TLS.
// A single REST object, once connected, can be used for many Quickbooks REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
bool bAutoReconnect = true;
success = rest.Connect("sandbox-quickbooks.api.intuit.com",443,true,bAutoReconnect);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

Chilkat.StringBuilder sbAuth = new Chilkat.StringBuilder();
sbAuth.Append("Bearer ");
sbAuth.Append(jsonToken.StringOf("access_token"));
rest.Authorization = sbAuth.GetAsString();

rest.AddHeader("Accept","application/json");
rest.AllowHeaderFolding = false;

string query = "select * from Customer";
rest.AddQueryParam("query",query);
rest.AddQueryParam("minorversion","45");

// The company ID is 123146096291789
string responseBody = rest.FullRequestNoBody("GET","/v3/company/123146096291789/query");
if (rest.LastMethodSuccess != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// We should expect a 200 response if successful.
if (rest.ResponseStatusCode != 200) {
    Debug.WriteLine("Request Header: ");
    Debug.WriteLine(rest.LastRequestHeader);
    Debug.WriteLine("----");
    Debug.WriteLine("Response StatusCode = " + Convert.ToString(rest.ResponseStatusCode));
    Debug.WriteLine("Response StatusLine: " + rest.ResponseStatusText);
    Debug.WriteLine("Response Header:");
    Debug.WriteLine(rest.ResponseHeader);
    Debug.WriteLine(responseBody);
    return;
}

// Load the JSON response into a JSON object for parsing.
// A sample JSON response is shown below.
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;
json.Load(responseBody);

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// Iterate over each customer returned.
int numRecords = json.SizeOfArray("QueryResponse.Customer");
int i = 0;
while (i < numRecords) {

    json.I = i;
    Debug.WriteLine("Name: " + json.StringOf("QueryResponse.Customer[i].FullyQualifiedName"));
    Debug.WriteLine("Id: " + json.StringOf("QueryResponse.Customer[i].Id"));
    Debug.WriteLine("City: " + json.StringOf("QueryResponse.Customer[i].BillAddr.City"));
    Debug.WriteLine("----");
    i = i + 1;
}

Debug.WriteLine("Success.");