连接QuickBooks Online实现于IOS App数据同步功能的个人记录

公司项目需要用WebService与QBO实现后台数据同步，由于国内没有做过类似第三方产品接口的资料，前前后后找了N久，终于实现功能，现把实现功能步骤贴上来分享：

QBO开发者地址（主要用于创建QBO的APP和获取KEY和Token）

https://developer.intuit.com/

QBO后台数据管理地址（存放常见的Invoice，Customer等数据）

https://qbo.intuit.com/qbo28/login?webredir

QBO官方参考文档地址

https://developer.intuit.com/docs/0100_accounting/0000_release_notes

1. 获取token的key和secret，在QBO开发者地址的My APPs中点击右上角Create New APP来创建一个新的App，选择Select APIs，然后勾选Accounting和Payments，创建后进入控制台界面，有三个Deveolpment、Production、AppCards三个选项卡。

Development：用与开发者模式下测试，在Development下只能连接到SandBox。SandBox可以在顶栏 右边栏下拉菜单找到。

Production：用于连接 QBO后台数据管理 地址中的数据

APPCards：用来发布你创建的APP的后台管理卡片

2.Token的Key和Secret在Development/Production的Keys栏下，分别是OAuth Consumer Key和OAuth Consumer Secret

3.获取二次Token的Key和Secret，

参照以下地址中的步骤：

https://developer.intuit.com/docs/0050_quickbooks_api/0020_authentication_and_authorization/connect_from_within_your_app

在Connect from within your app栏可以找到具体操作步骤

需要以下三个地址：Intuit OAuth Service URLs

• Request token URL is:  https://oauth.intuit.com/oauth/v1/get_request_token
• User authorization URL is: https://appcenter.intuit.com/Connect/Begin
• Access Token Request URL is: https://oauth.intuit.com/oauth/v1/get_access_token

得到返回的三个参数：分别是

• realmId
• oauth_verifier
• oauth_token

在认证时候，如果是用Development的Key和Secret，是会默认连接到Sandbox的数据的，所以想看到公共的 QBO后台数据管理 中的数据，需要用Production中的Key和Secret。

获得二次Token的Key和Secret后，就可以通过SDK或REST API的方式连接到QBO来获取和推送数据了。

一、SDK方式同步QBO：

官方SDK文档：

http://developer.qbapi.com/Quickbooks-Online-API-QuickStart.aspx

官方SDK下载：

https://www.nuget.org/packages/IppDotNetSdkForQuickBooksApiV3/

如果需要.NET连接QBO的后台示例代码，也可以在以下URL中找到

http://developer.qbapi.com/Connect-to-Quickbooks-Online.aspx#

1.添加引用：

using DevDefined.OAuth.Consumer;
using DevDefined.OAuth.Framework;
using Intuit.Ipp.Core;
using Intuit.Ipp.DataService;
using Intuit.Ipp.Security;

2.定义GetServiceContext方法，用于返回ServiceContext

public static ServiceContext GetServiceContext(string AccessToken, string AccessTokenSecret, string CompanyId)
{

OAuthRequestValidator oauthValidator = new OAuthRequestValidator(AccessToken, AccessTokenSecret, consumerKey, consumerSecret);
ServiceContext context = new ServiceContext(CompanyId, IntuitServicesType.QBO, oauthValidator);
context.IppConfiguration.BaseUrl.Qbo = "https://quickbooks.api.intuit.com/";
return context;
}

consumerKey和consumerSecret是QBO开发者地址中Production下的OAuth Consumer Key和OAuth Consumer Secret

GetServiceContext方法中的参数，AccessToken、AccessTokenSecret和CompanyId分别是二次Token中返回的oauth_token、oauth_verifier和realmId

3.创建QBO连接：

public static DataService ConnectToQBO(string AccessToken, string AccessTokenSecret, string CompanyId)
{
OAuthRequestValidator oauthValidator = new OAuthRequestValidator(AccessToken, AccessTokenSecret, consumerKey, consumerSecret);
ServiceContext context = GetServiceContext(AccessToken, AccessTokenSecret, CompanyId);
DataService dataService = new DataService(context);
return dataService;
}

4.查询QBO对应的信息：

返回Invoice信息：

DataService dataService = QBOCommonUtility.ConnectToQBO(AccessToken, AccessTokenSecret, CompanyId);
List<Invoice> invoiceList = dataService.FindAll(new Invoice(), 1, 100).ToList();

5.根据条件查询QBO信息：

1）方法一：

DataService dataService = QBOCommonUtility.ConnectToQBO(AccessToken, AccessTokenSecret, CompanyId);
Invoice invoice = dataService.FindAll(new Invoice()).Where(a => a.Id == request.Invoice.QBOId).SingleOrDefault();

2）方法二：

ServiceContext context = QBOCommonUtility.GetServiceContext(AccessToken, AccessTokenSecret, CompanyId);
QueryService<Invoice> queryService = new QueryService<Invoice>(context);
string query = string.Format("SELECT * FROM Invoice where Id='{0}'",id);
IEnumerable<Invoice> invoices = queryService.ExecuteIdsQuery(query);

6.插入一个新的Customer到QBO

public static Customer InsertQBOCustomer(QBOCustomerRequest request)
{
string AccessToken = request.AccessToken;
string AccessTokenSecret= request.AccessSecret;
string CompanyId = request.CompanyId;
DataService dataService = QBOCommonUtility.ConnectToQBO(AccessToken, AccessTokenSecret, CompanyId);
Customer customer = new Customer();
//Mandatory Fields

customer.Title = request.Customer.Title == null ? "" : request.Customer.Title;
customer.GivenName = request.Customer.GivenName == null ? "" : request.Customer.GivenName;
customer.MiddleName = request.Customer.MiddleName == null ? "" : request.Customer.MiddleName;
customer.FamilyName = request.Customer.FamilyName == null ? "" : request.Customer.FamilyName;
customer.Notes = request.Customer.Notes == null ? "" : request.Customer.Notes;
customer.Suffix = request.Customer.Suffix == null ? "" : request.Customer.Suffix;
customer.FullyQualifiedName = request.Customer.FullyQualifiedName == null ? "" : request.Customer.FullyQualifiedName;
customer.CompanyName = request.Customer.CompanyName == null ? "" : request.Customer.CompanyName;
customer.DisplayName = request.Customer.DisplayName == null ? "" : request.Customer.DisplayName;

if (request.Customer.BillAddr!=null)
{
customer.BillAddr = new PhysicalAddress();
customer.BillAddr.City = request.Customer.BillAddr.City == null ? "" : request.Customer.BillAddr.City;
customer.BillAddr.Country = request.Customer.BillAddr.Country == null ? "" : request.Customer.BillAddr.Country;
customer.BillAddr.CountrySubDivisionCode = request.Customer.BillAddr.CountrySubDivisionCode == null ? "" : request.Customer.BillAddr.CountrySubDivisionCode;
customer.BillAddr.Line1 = request.Customer.BillAddr.Line1 == null ? "" : request.Customer.BillAddr.Line1;
customer.BillAddr.PostalCode = request.Customer.BillAddr.PostalCode == null ? "" : request.Customer.BillAddr.PostalCode;
}

if(request.Customer.PrimaryPhone!=null)
{
customer.PrimaryPhone = new TelephoneNumber();
customer.PrimaryPhone.FreeFormNumber = request.Customer.PrimaryPhone.FreeFormNumber == null ? "" : request.Customer.PrimaryPhone.FreeFormNumber;
}

if(request.Customer.PrimaryEmailAddr!=null)
{
customer.PrimaryEmailAddr = new EmailAddress();
customer.PrimaryEmailAddr.Address = request.Customer.PrimaryEmailAddr.Address == null ? "" : request.Customer.PrimaryEmailAddr.Address;
}

Customer resultCustomer = dataService.Add(customer) as Customer;
return resultCustomer;
}

8.插入新的Invoice到QBO

internal static Invoice CreateInvoice(QBOInvoiceRequest request, Customer customer)
{
try
{
string AccessToken = request.AccessToken;
string AccessTokenSecret = request.AccessTokenSecret;
string CompanyId = request.Invoice.QBOCompanyId;
DataService dataService = QBOCommonUtility.ConnectToQBO(AccessToken, AccessTokenSecret, CompanyId);

Item item = dataService.FindAll(new Item(), 1, 1).SingleOrDefault();

Invoice invoice = new Invoice();
//Mandatory fields
invoice.DocNumber = Guid.NewGuid().ToString("N").Substring(0, 10);
invoice.TxnDate = Convert.ToDateTime(request.Invoice.InvoiceDate);//DateTime.Today.Date;//
invoice.TxnDateSpecified = true;
invoice.CustomerRef = new ReferenceType()
{
name = customer.GivenName,
Value = customer.Id
};

Line line = new Line();

line.Amount = request.Invoice.Amount;//request.Invoice.Amount;//10000;
line.DetailType = LineDetailTypeEnum.DescriptionOnly;
line.AmountSpecified = true;
line.Description = "Desc Invoice";
line.DetailType = LineDetailTypeEnum.SalesItemLineDetail;
line.DetailTypeSpecified = true;

SalesItemLineDetail lineSalesItemLineDetail = new SalesItemLineDetail();
//Line Sales Item Line Detail - ItemRef
lineSalesItemLineDetail.ItemRef = new ReferenceType()
{
name = item.Name,
Value = item.Id
};
//Line Sales Item Line Detail - UnitPrice
lineSalesItemLineDetail.AnyIntuitObject = 0m;
lineSalesItemLineDetail.ItemElementName = ItemChoiceType.UnitPrice;

//Line Sales Item Line Detail - Qty
lineSalesItemLineDetail.Qty = 0;
lineSalesItemLineDetail.QtySpecified = true;

//Line Sales Item Line Detail - TaxCodeRef
//For US companies, this can be 'TAX' or 'NON'
lineSalesItemLineDetail.TaxCodeRef = new ReferenceType()
{
Value = "NON"
};

//Line Sales Item Line Detail - ServiceDate
lineSalesItemLineDetail.ServiceDate = DateTime.Now.Date;
lineSalesItemLineDetail.ServiceDateSpecified = true;

//Assign Sales Item Line Detail to Line Item
line.AnyIntuitObject = lineSalesItemLineDetail;
//Assign Line Item to Invoice
invoice.Line = new Line[] { line };

Invoice addInvoice = dataService.Add(invoice) as Invoice;
return addInvoice;

//Invoice invoice1 = invoiceList[0];
//invoice1.CustomerRef = invoice.CustomerRef;
//Invoice addInvoice1 = dataService.Update(invoice1);

//Batch batch = dataService.CreateNewBatch();
//batch.Add(invoice, "bId1", OperationEnum.create);
//batch.Execute();
}
catch (ValidationException exception)
{
Console.WriteLine("Message:{0}, ErrorCode:{1}", exception.Message, exception.ErrorCode);
foreach (IdsError idsError in exception.InnerExceptions)
{
Console.WriteLine("ErrorCode:{0}, Message:{1}, Element:{2}, Detail:{3}", idsError.ErrorCode, idsError.Message,
idsError.Element, idsError.Detail);
}
return null;
}

}

9.更新Customer到QBO

public static Customer UpdateQBOCustomer(QBOCustomerRequest request, string id)
{
string AccessToken = request.AccessToken;
string AccessTokenSecret = request.AccessSecret;
string CompanyId = request.CompanyId;

DataService dataService = QBOCommonUtility.ConnectToQBO(AccessToken, AccessTokenSecret, CompanyId);
Customer customer = GetQBOCustomerById(AccessToken, AccessTokenSecret, CompanyId, id);
Customer resultCustomer = new Customer();//dataService.FindById(customer) as Customer;
if (customer != null)
{
bool isChanged = false;
if (customer.DisplayName != request.Customer.DisplayName)
{
customer.DisplayName = request.Customer.DisplayName == null ? "" : request.Customer.DisplayName;
customer.GivenName = request.Customer.GivenName == null ? "" : request.Customer.GivenName;
customer.MiddleName = request.Customer.MiddleName == null ? "" : request.Customer.MiddleName;
customer.FamilyName = request.Customer.FamilyName == null ? "" : request.Customer.FamilyName;
isChanged = true;
}
if (request.Customer.PrimaryPhone != null)
{
if (customer.PrimaryPhone == null)
{
customer.PrimaryPhone = new TelephoneNumber();
}
if(customer.PrimaryPhone.FreeFormNumber != request.Customer.PrimaryPhone.FreeFormNumber)
{
customer.PrimaryPhone.FreeFormNumber = request.Customer.PrimaryPhone.FreeFormNumber == null ? "" : request.Customer.PrimaryPhone.FreeFormNumber;
isChanged = true;
}
}
if(customer.CompanyName != request.Customer.CompanyName)
{
customer.CompanyName = request.Customer.CompanyName == null ? "" : request.Customer.CompanyName;
isChanged = true;
}
if (request.Customer.PrimaryEmailAddr != null)
{
if(customer.PrimaryEmailAddr == null)
{
customer.PrimaryEmailAddr = new EmailAddress();
}
if(customer.PrimaryEmailAddr.Address != request.Customer.PrimaryEmailAddr.Address)
{
customer.PrimaryEmailAddr.Address = request.Customer.PrimaryEmailAddr.Address == null ? "" : request.Customer.PrimaryEmailAddr.Address;
isChanged = true;
}
}
if (customer.Title != request.Customer.Title)
{
customer.Title = request.Customer.Title == null ? "" : request.Customer.Title;
isChanged = true;
}
if(customer.Notes != request.Customer.Notes)
{
customer.Notes = request.Customer.Notes == null ? "" : request.Customer.Notes;
isChanged = true;
}

if(isChanged)
{
resultCustomer = dataService.Update(customer) as Customer;
}
return resultCustomer;
}
return customer;
}

10.更新Invoice信息到QBO

internal static Invoice UpdateInvoice(QBOInvoiceRequest request, Customer customer)
{
string AccessToken = request.AccessToken;
string AccessTokenSecret = request.AccessTokenSecret;
string CompanyId = request.Invoice.QBOCompanyId;
DataService dataService = QBOCommonUtility.ConnectToQBO(AccessToken, AccessTokenSecret, CompanyId);
Invoice invoice = dataService.FindAll(new Invoice()).Where(a => a.Id == request.Invoice.QBOId).SingleOrDefault();
if (invoice == null)
{
return null;
}
invoice.CustomerRef.Value = customer.Id;
invoice.TxnDate = Convert.ToDateTime(request.Invoice.InvoiceDate);

Line line = invoice.Line[0];
line.Amount = request.Invoice.Amount;

var termStr = request.Invoice.Term;
int termDays = CommonUtility.getTermDays(termStr);
string dueDate = DateTime.Parse(request.Invoice.InvoiceDate).AddDays(termDays).ToString(Constants.FORMAT_MONTH_DAY_YEAR);
invoice.DueDate = Convert.ToDateTime(dueDate);

if (invoice.BillEmail == null)
{
invoice.BillEmail = new EmailAddress();
invoice.BillEmail.DefaultSpecified = true;
invoice.BillEmail.Address = request.Invoice.ContactEmail;
}
invoice.PrivateNote = request.Invoice.Note;

Item item = dataService.FindAll(new Item(), 1, 1).SingleOrDefault();
SalesItemLineDetail lineSalesItemLineDetail = new SalesItemLineDetail();
//Line Sales Item Line Detail - ItemRef
lineSalesItemLineDetail.ItemRef = new ReferenceType()
{
name = item.Name,
Value = item.Id
};
//Line Sales Item Line Detail - UnitPrice
lineSalesItemLineDetail.AnyIntuitObject = 0m;
lineSalesItemLineDetail.ItemElementName = ItemChoiceType.UnitPrice;

//Line Sales Item Line Detail - Qty
lineSalesItemLineDetail.Qty = 0;
lineSalesItemLineDetail.QtySpecified = true;

//Line Sales Item Line Detail - TaxCodeRef
//For US companies, this can be 'TAX' or 'NON'
lineSalesItemLineDetail.TaxCodeRef = new ReferenceType()
{
Value = "NON"
};

//Line Sales Item Line Detail - ServiceDate
lineSalesItemLineDetail.ServiceDate = DateTime.Now.Date;
lineSalesItemLineDetail.ServiceDateSpecified = true;

//Assign Sales Item Line Detail to Line Item
line.AnyIntuitObject = lineSalesItemLineDetail;

Invoice updateInvoice = dataService.Update(invoice);
return updateInvoice;
}

11.删除QBO中的Invoice信息

public static bool DeleteInvoice(string invoiceid, string AccessToken, string AccessTokenSecret, string CompanyId)
{
DataService dataService = QBOCommonUtility.ConnectToQBO(AccessToken, AccessTokenSecret, CompanyId);
Invoice invoice = dataService.FindAll(new Invoice()).Where(a => a.Id == invoiceid).SingleOrDefault();
Invoice updateInvoice = dataService.Delete(invoice);
return true;
}

二、REST API方式连接QBO

参考文档和API接口地址：

https://developer.intuit.com/docs/api/accounting/invoice

官方API测试地址：

https://developer.intuit.com/v2/apiexplorer?apiname=V3QBO#?id=Account

1.REST API 查询：

public static string ExecuteV3Query(string AccessToken, string AccessTokenSecret, string CompanyId, string Query)
{
string encodeQuery = System.Web.HttpUtility.UrlEncode(Query);
string uri = string.Format("https://quickbooks.api.intuit.com/v3/company/{0}/query?query={1}&minorversion=4", CompanyId, Query);

HttpWebRequest httpWebRequest = WebRequest.Create(uri) as HttpWebRequest;
httpWebRequest.Method = "GET";
httpWebRequest.Accept = "application/json";
httpWebRequest.Headers.Add("Authorization", GetDevDefinedOAuthHeader(consumerKey, consumerSecret, AccessToken, AccessTokenSecret, httpWebRequest, null));

HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse;
using(Stream data = httpWebResponse.GetResponseStream())
{
return new StreamReader(data).ReadToEnd();
}
}

参数中的Query字符串是用来传递SQL语句的比如“select * from Invoice”

private static string GetDevDefinedOAuthHeader(string consumerkey,string consumerSecret,string accessToken,string accessTokenSecret,HttpWebRequest webRequest,string requestBody)
{
OAuthConsumerContext consumerContext = new OAuthConsumerContext
{
ConsumerKey = consumerkey,
SignatureMethod = SignatureMethod.HmacSha1,
ConsumerSecret = consumerSecret,
UseHeaderForOAuthParameters = true

};

//We already have OAuth tokens, so OAuth URIs below are not used - set to example.com
OAuthSession oSession = new OAuthSession(consumerContext, "https://www.example.com", "https://www.example.com", "https://www.example.com");
oSession.AccessToken = new TokenBase
{
Token = accessToken,
ConsumerKey = consumerKey,
TokenSecret = accessTokenSecret
};

IConsumerRequest consumerRequest = oSession.Request();
consumerRequest = ConsumerRequestExtensions.ForMethod(consumerRequest, webRequest.Method);
if(requestBody!=null)
{
consumerRequest = consumerRequest.Post().WithRawContentType(webRequest.ContentType).WithRawContent(System.Text.Encoding.ASCII.GetBytes(requestBody));

}
consumerRequest = ConsumerRequestExtensions.ForUri(consumerRequest, webRequest.RequestUri);
consumerRequest = consumerRequest.SignWithToken();
return consumerRequest.Context.GenerateOAuthParametersForHeader();
}

2.REST API 新建Invoice

1）连接QBO的新建函数：

public static string ExecuteV3InvoiceInsert(string AccessToken, string AccessTokenSecret, string CompanyId,string body)
{
string uri = string.Format("https://quickbooks.api.intuit.com/v3/company/{0}/invoice?minorversion=4", CompanyId);

HttpWebRequest httpWebRequest = WebRequest.Create(uri) as HttpWebRequest;
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "application/json";
httpWebRequest.Accept = "application/json";
httpWebRequest.Headers.Add("Authorization", GetDevDefinedOAuthHeader(consumerKey, consumerSecret, AccessToken, AccessTokenSecret, httpWebRequest, null));

byte[] formData = UTF8Encoding.UTF8.GetBytes(body);
httpWebRequest.ContentLength = formData.Length;
using (Stream postStream = httpWebRequest.GetRequestStream())
{
postStream.Write(formData, 0, formData.Length);
}
string response = string.Empty;
try
{
WebResponse webResponse = httpWebRequest.GetResponse();
using (Stream webStream = webResponse.GetResponseStream())
{
if (webStream != null)
{
using (StreamReader responseReader = new StreamReader(webStream))
{
response = responseReader.ReadToEnd();
}
}
}
return response;
}
catch(Exception ex)
{
return "";
}
}

2）逻辑层调用ExecuteV3InvoiceInsert函数：

internal static BOSmobileService.DataObjects.RefInvoice CreateInvoiceAPI(QBOInvoiceRequest request, Customer customer)
{
string AccessToken = request.AccessToken;
string AccessTokenSecret = request.AccessTokenSecret;
string CompanyId = request.Invoice.QBOCompanyId;
var amount = request.Invoice.Amount;
var invoiceDate = request.Invoice.InvoiceDate;
var termStr = request.Invoice.Term;
int termDays = CommonUtility.getTermDays(termStr);
string dueDate = DateTime.Parse(invoiceDate).AddDays(termDays).ToString(Constants.FORMAT_MONTH_DAY_YEAR);
var contactEmail = request.Invoice.ContactEmail;
var note = request.Invoice.Note;

string body = GetParams(invoiceDate, dueDate, note, amount.ToString(), customer.Id, contactEmail);
string refStr = QBOCommonUtility.ExecuteV3InvoiceInsert(AccessToken, AccessTokenSecret, CompanyId, body);

BOSmobileService.DataObjects.RefInvoice invocie = Newtonsoft.Json.JsonConvert.DeserializeObject<BOSmobileService.DataObjects.RefInvoice>(refStr);
return invocie;
}

public static string GetParams(string invoiceDate, string dueDate, string note, string amount, string customerId, string contactEmail)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"TxnDate\":\"");
sb.Append(invoiceDate);
sb.Append("\",\"DueDate\":\"");
sb.Append(dueDate);
sb.Append("\",\"PrivateNote\":\"");
sb.Append(note);
sb.Append("\",\"Line\":[{\"Amount\":");
sb.Append(amount);
sb.Append(",\"DetailType\": \"SalesItemLineDetail\",\"SalesItemLineDetail\": {\"ItemRef\": {\"value\": \"1\",\"name\": \"Sales\"}}}],\"CustomerRef\": {\"value\": \"");
sb.Append(customerId);
sb.Append("\"},\"BillEmail\": {\"Address\":\"");
sb.Append(contactEmail);
sb.Append("\"}}");
return sb.ToString();
}

3. REST API删除Invoice

public static bool DeleteInvoiceAPI(string invoiceid, string AccessToken, string AccessTokenSecret, string CompanyId)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"Id\": \"");
sb.Append(invoiceid);
sb.Append("\",\"SyncToken\": \"3\"}");
string body = sb.ToString();//string.Format("{\"Id\": \"{0}\",\"SyncToken\": \"3\"}",invoiceid);
string refStr = QBOCommonUtility.ExecuteV3InvoiceDelete(AccessToken, AccessTokenSecret, CompanyId, body);
return true;
}

public static string ExecuteV3InvoiceDelete(string AccessToken, string AccessTokenSecret, string CompanyId, string body)
{
string uri = string.Format("https://quickbooks.api.intuit.com/v3/company/{0}/invoice?operation=delete&minorversion=4", CompanyId);
HttpWebRequest httpWebRequest = WebRequest.Create(uri) as HttpWebRequest;
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "application/json";
httpWebRequest.Accept = "application/json";
httpWebRequest.Headers.Add("Authorization", GetDevDefinedOAuthHeader(consumerKey, consumerSecret, AccessToken, AccessTokenSecret, httpWebRequest, null));

byte[] formData = UTF8Encoding.UTF8.GetBytes(body);
httpWebRequest.ContentLength = formData.Length;
using (Stream postStream = httpWebRequest.GetRequestStream())
{
postStream.Write(formData, 0, formData.Length);
}
string response = string.Empty;
try
{
WebResponse webResponse = httpWebRequest.GetResponse();
using (Stream webStream = webResponse.GetResponseStream())
{
if (webStream != null)
{
using (StreamReader responseReader = new StreamReader(webStream))
{
response = responseReader.ReadToEnd();
}
}
}
return response;
}
catch (Exception ex)
{
return "Error";
}

}

4. 创建Payment（创建与Invoice的Amount金额数目相对应Payment等同于把Invoice设置成Paid状态）

public static string MarkInvoicePaid(string invoiceid, string customerId, decimal amount, string AccessToken, string AccessTokenSecret, string CompanyId)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"CustomerRef\":{\"value\": \"");
sb.Append(customerId);
sb.Append("\"},\"TotalAmt\": ");
sb.Append(amount.ToString());
sb.Append(",\"Line\": [{\"Amount\": ");
sb.Append(amount.ToString());
sb.Append(",\"LinkedTxn\": [{\"TxnId\": \"");
sb.Append(invoiceid);
sb.Append("\",\"TxnType\": \"Invoice\"}]}]}");
string body = sb.ToString();
string response = QBOCommonUtility.ExecuteV3InvoicePayment(AccessToken, AccessTokenSecret, CompanyId, body);
return response;
}

internal static string ExecuteV3InvoicePayment(string AccessToken, string AccessTokenSecret, string CompanyId, string body)
{
string uri = string.Format("https://quickbooks.api.intuit.com/v3/company/{0}/payment?minorversion=4", CompanyId);
HttpWebRequest httpWebRequest = WebRequest.Create(uri) as HttpWebRequest;
httpWebRequest.Method = "POST";
httpWebRequest.ContentType = "application/json";
httpWebRequest.Accept = "application/json";
httpWebRequest.Headers.Add("Authorization", GetDevDefinedOAuthHeader(consumerKey, consumerSecret, AccessToken, AccessTokenSecret, httpWebRequest, null));

byte[] formData = UTF8Encoding.UTF8.GetBytes(body);
httpWebRequest.ContentLength = formData.Length;
using (Stream postStream = httpWebRequest.GetRequestStream())
{
postStream.Write(formData, 0, formData.Length);
}
string response = string.Empty;
try
{
WebResponse webResponse = httpWebRequest.GetResponse();
using (Stream webStream = webResponse.GetResponseStream())
{
if (webStream != null)
{
using (StreamReader responseReader = new StreamReader(webStream))
{
response = responseReader.ReadToEnd();
}
}
}
return response;
}
catch (Exception ex)
{
return "Error";
}
}