我正在尝试连接到Azure AD并且我正在使用此代码。
try
{
var clientCredential = new ClientCredential(_clientId, _clientSecret);
var authContext = new AuthenticationContext(AuthUri + _tenant);
var authResult = await authContext.AcquireTokenAsync(GraphUri,clientCredential);
var authString = authResult.CreateAuthorizationHeader();
var client = new HttpClient();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var request = new HttpRequestMessage
{
Method = HttpMethod.Get,
RequestUri = _requestUri,
};
request.Headers.Add("Authorization", authString);
HttpResponseMessage response = null;
await client.SendAsync(request).ContinueWith(taskWithMessage =>
{
response = taskWithMessage.Result;
});
return await response.Content.ReadAsStringAsync();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
我不明白的一个大问题是,当执行到达第一个等待(var authResult = await authContext.AcquireTokenAsync(GraphUri,clientCredential);
)时,该过程就会被杀死。没有异常被抛出,没有。
如果我用
替换该行var authResult = authContext.AcquireTokenAsync(GraphUri,clientCredential);
var authString = authResult.Result.CreateAuthorizationHeader();
执行一直持续到await client.SendAsync(request).ContinueWith(taskWithMessage...
,其中进程再次被杀死,没有抛出任何异常或任何警告或其他消息。
更奇怪的是,这个代码在另一个项目中运行得很好,但在这里它不会工作。
编辑:
static void ImportLicence()
{
InsertToDb();
}
public async void InsertoDb()
{
var x = await GetSP();
}
public async Task<Dictionary<ServicePlanViewModel, List<ServicePlanViewModel>>> GetSP()
{
var sp = await MakeRq();
}
public async Task<string> MakeRequest()
{
var authString = await GetAuth();
..........
return await response.Content.ReadAsStringAsync();
}
private async Task<string> GetAuth()
{
.....
var authResult = await authContext.AcquireTokenAsync(GraphUri, clientCredential);
return authResult.CreateAuthorizationHeader();
}
答案 0 :(得分:6)
这个过程被简单地杀死了。没有异常被抛出,没有。
我假设你在控制台应用程序中运行它,并且你的顶级代码看起来像这样:
static void Main()
{
MyMethodAsync();
}
在这种情况下,main方法实际上会退出,因为它不等待您的异步代码完成。
在控制台应用程序中使用async
的一种方法是在Main
方法中阻止。通常,您希望一直“异步”#34;但是控制台应用的Main
方法是此规则的例外情况:
static void Main() => MainAsync().GetAwaiter().GetResult();
static async Task MainAsync()
{
// Original code from Main, but adding any necessary `await`s.
await MyMethodAsync();
}
更新: Don't use async void
;改为使用async Task
:
static async Task ImportLicenceAsync()
{
await InsertToDbAsync();
}
public async Task InsertoDbAsync()
{
var x = await GetSPAsync();
}
答案 1 :(得分:1)
更新代码,使其始终处于异步状态。确保您没有在调用堆栈的上方混合异步和同步代码。避免使用async void
。
public async Task<string> SomeMethodAsync() {
try {
var clientCredential = new ClientCredential(_clientId, _clientSecret);
var authContext = new AuthenticationContext(AuthUri + _tenant);
var authResult = await authContext.AcquireTokenAsync(GraphUri,clientCredential);
var authString = authResult.CreateAuthorizationHeader();
var client = new HttpClient();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var request = new HttpRequestMessage {
Method = HttpMethod.Get,
RequestUri = _requestUri,
};
request.Headers.Add("Authorization", authString);
using(var response = await client.SendAsync(request)) {
return await response.Content.ReadAsStringAsync();
}
} catch (Exception ex) {
Console.WriteLine(ex);
}
}