C# Xero发票使用标准.NET库发送电子邮件

在这里，我在标准.NET库中创建了我的项目，以获取/发布发票。但是，正如我想通过电子邮件发送以该名称创建的发票。下面是我创建发票的示例代码。

        public async Task<ActionResult> Create(string Name, string LineDescription, string LineQuantity, string LineUnitAmount, string LineAccountCode)
        {
            var xeroToken = TokenUtilities.GetStoredToken();
            var utcTimeNow = DateTime.UtcNow;

            var serviceProvider = new ServiceCollection().AddHttpClient().BuildServiceProvider();
            var httpClientFactory = serviceProvider.GetService<IHttpClientFactory>();

            XeroConfiguration XeroConfig = new XeroConfiguration
            {
                ClientId = ConfigurationManager.AppSettings["XeroClientId"],
                ClientSecret = ConfigurationManager.AppSettings["XeroClientSecret"],
                CallbackUri = new Uri(ConfigurationManager.AppSettings["XeroCallbackUri"]),
                Scope = ConfigurationManager.AppSettings["XeroScope"],
                State = ConfigurationManager.AppSettings["XeroState"]
            };

            if (utcTimeNow > xeroToken.ExpiresAtUtc)
            {
                var client = new XeroClient(XeroConfig, httpClientFactory);
                xeroToken = (XeroOAuth2Token)await client.RefreshAccessTokenAsync(xeroToken);
                TokenUtilities.StoreToken(xeroToken);
            }

            string accessToken = xeroToken.AccessToken;
            string xeroTenantId = xeroToken.Tenants[0].TenantId.ToString();
            //string xeroTenantId = xeroToken.Tenants[1].TenantId.ToString();

            var contact = new Contact();
            contact.Name = Name;

            var line = new LineItem()
            {
                Description = LineDescription,
                Quantity = decimal.Parse(LineQuantity),
                UnitAmount = decimal.Parse(LineUnitAmount),
                AccountCode = LineAccountCode
            };

            var lines = new List<LineItem>() { line };
            //var lines = new List<LineItem>();
            //for (int j = 0;j < 5;j++)
            //{
            //    lines.Add(line);
            //}
            
            var invoice = new Invoice()
            {
                Type = Invoice.TypeEnum.ACCREC,
                Contact = contact,
                Date = DateTime.Today,
                DueDate = DateTime.Today.AddDays(30),
                LineItems = lines
            };

            var invoiceList = new List<Invoice>();
            invoiceList.Add(invoice);

            var invoices = new Invoices();
            invoices._Invoices = invoiceList;

            var AccountingApi = new AccountingApi();
            var response = await AccountingApi.CreateInvoicesAsync(accessToken, xeroTenantId, invoices);
            RequestEmpty _request = new RequestEmpty();
            //trying this method to send email to specified invoice....
            //var test = await AccountingApi.EmailInvoiceAsync(accessToken, xeroTenantId, Guid.NewGuid(), null);
            var updatedUTC = response._Invoices[0].UpdatedDateUTC;

            return RedirectToAction("Index", "InvoiceSync");
        }

如何使用此方法向指定发票发送电子邮件？
它向我抛出了一个关于无法将void赋值给隐式类型变量的错误

此库中还有另一种方法。

var test2 = await AccountingApi.EmailInvoiceAsyncWithHttpInfo(accessToken, xeroTenantId, Guid.NewGuid(), null);

正如

Guid.NewGuid（）

更新1:

这是我使用的第二种方法

await AccountingApi.EmailInvoiceAsyncWithHttpInfo(accessToken, xeroTenantId, Guid.NewGuid(), null)


更新2:

这是我使用的代码。

        public async Task EmailInvoiceTest(string accessToken,string xeroTenantId,Guid invoiceID, RequestEmpty requestEmpty)
        {
            var AccountingApi = new AccountingApi();
            await AccountingApi.EmailInvoiceAsync(accessToken, xeroTenantId, invoiceID, requestEmpty).ConfigureAwait(false);
        }

方法
EmailInvoiceAsync
的返回类型似乎是
Task
，返回类型为void。如果等待任务，则没有可分配给变量的返回类型。删除变量赋值，并为类型为
RequestEmpty
的参数传递一个有效参数以解决此问题

RequestEmpty requestEmpty = new RequestEmpty();
await AccountingApi.EmailInvoiceAsync(accessToken, xeroTenantId, Guid.NewGuid(), requestEmpty);

有关示例测试，请参见

重要提示：根据（请参见
通过电子邮件发送发票
一节），发票必须为“认可”类型，并且必须具有用于发送的有效状态（
Sumbited
、
Authorized
或
PAID
）。
我假设这两种方法的返回值均为void类型。您是否尝试删除
var test=
/
var test2=
？@rufer7，因为我已经更新了它的请求空？
RequestEmpty requestEmpty = new RequestEmpty();
await AccountingApi.EmailInvoiceAsync(accessToken, xeroTenantId, Guid.NewGuid(), requestEmpty);