PostAsync 调用消失，网页再次可用

Question

我有一个网页正在尝试调用 Web 服务，但在调用时它跳过了进程。

这就是我指的...

当我在客户输入支票信息后调用此方法时：

public CheckInfo SubmitCheck(CheckInfo checkInfo)
{
  try
  {
    var check = new Check();
    check.account_number = checkInfo.CheckAccountNumber;
    check.transit_number = checkInfo.CheckRoutingNumber;
    check.amount = checkInfo.Amount.ToString();
    check.check_number = checkInfo.CheckNumber;
    check.bill_to_city = checkInfo.City;
    check.bill_to_country = "US";
    check.bill_to_postal_code = checkInfo.Zip;
    check.bill_to_street = checkInfo.Street;
    check.bill_to_state = checkInfo.State;
    check.name_on_check = checkInfo.NameOnCheck;
    check.transaction_type = "sale";
    check.account_type = checkInfo.AccountType;
    check.check_type = checkInfo.CheckType;
    
    var ent = new SuburbanPortalEntities();
    var gatewaySettings = (from x in ent.GatewayUsers
      where x.TokenId == CurrentCustomerSession.Current.TokenId &&
            x.Gateway.Name == "DirectAch2"
      select x).FirstOrDefault();
   
    var credentials = new Authentication();
    credentials.password = gatewaySettings.Password;
    credentials.username = gatewaySettings.UserName;

    var response = Process.SubmitCheck(credentials, check).Result;

调用私有的publicclassclass:

public static async Task<Response> SubmitCheck(Authentication authentication, Check check)
{
  return await Submit(authentication, check, PaymentTypes.Check);
}

提交检查方法：

private static async Task<Response> Submit(Authentication authentication, Object payment, PaymentTypes paymentType)
{
  var resp = new Response();

  try
  {
    var client = new HttpClient();
    var bodyjson = JsonConvert.SerializeObject(authentication);
    var bodycontent = new StringContent(bodyjson, Encoding.UTF8, "application/json");
    var authenticationPost =
      await client.PostAsync("https://someplace.com/api/v2/Identity", bodycontent);
    var bodyResponseJson = await authenticationPost.Content.ReadAsStringAsync();

当我到达这一行时，它只是 returns 超出了方法并且它没有继续任何东西，就像我从未执行过这个方法一样。

    var authenticationPost =
      await client.PostAsync("https://someplace.com/api/v2/Identity", bodycontent);

此行之后没有执行其他代码。它只是停止，网页再次可用。我的方法包含在 try catch 中，但 catch 没有.. 捕获任何东西。

我对此一头雾水，有什么建议吗？

编辑#1

我按照建议将线包裹在 try catch 中。

    try
    {
    authenticationPost =
      await client.PostAsync("https://someplace.com/api/v2/Identity", bodycontent);
    }
    catch (Exception e)
    {
      Console.WriteLine(e);
      throw;
    }

它正在跳出 try/catch，此后不再执行任何代码。没有捕获到异常，什么都没有，它只是运行该行并离开该方法。

Answer 1

这是你的问题：

var response = Process.SubmitCheck(credentials, check).Result;

Don't block on async code，正如我在我的博客中描述的那样。对于 async/await 的新手来说，这是一个常见的错误。使用 await:

而不是 Result

public async Task<CheckInfo> SubmitCheck(CheckInfo checkInfo)
{
  ...
  var response = await Process.SubmitCheck(credentials, check);

请注意，您随后需要 await 调用 SubmitCheck，依此类推。这是 async all the way.

旁注：我建议在方法名称上使用 standard pattern 或 *Async 后缀；它在代码中更清楚地表明它们的 return 值需要 awaited:

public async Task<CheckInfo> SubmitCheckAsync(CheckInfo checkInfo)
{
  ...
  var response = await Process.SubmitCheckAsync(credentials, check);

PostAsync 调用消失，网页再次可用

PostAsync call vanishes and web page becomes available again

c#

asp.net-mvc

postasync