Asp.net core 错误：'；在SetAuthenticationState之前调用了GetAuthenticationStateAync；

我有一个blazor项目，其中我使用依赖项注入来使用AuthenticationStateProvider

我收到错误：
'在SetAuthenticationState之前调用了GetAuthenticationStateAync

我有两项服务：

返回用户标识的ServiceClass

IReportServiceConfiguration使用另一个服务从数据库（xml字符串）返回报告

报表解析程序间接依赖于ServiceClass，这是startup.cs中的注册：

  services.AddScoped<IServiceClass, ServiceClass>();
        services.AddScoped<IReportServiceConfiguration>(sp =>
            new ReportServiceConfiguration
            {

                ReportingEngineConfiguration = sp.GetService<IConfiguration>(),


                HostAppId = "Html5DemoAppCore",
                Storage = new FileStorage(),
                ReportSourceResolver = sp.GetService<CustomReportSourceResolver>(),
            }
            ); ;

---

为了通过数据库获取报告，它使用datacontext，从上面的代码可以看出。Datacontext具有动态连接字符串，这就是为什么执行转到服务类中的getIdentity（）方法，然后我们在主题中得到消息。

请发布ServiceClass服务的代码…@enet我已将代码添加到帖子中。其中还有其他方法，但我刚刚发布了有问题的方法。@enet在github上托管此方法很困难，因为项目中使用了一些付费订阅/源，除非您购买它们，否则无法编译。还有别的方法吗？以前从来没有这样做过。我想还有其他网站可以让你下载代码。我只是想看看相关的代码。如果你找不到上传应用程序的方法，只需在这里发布相关代码，稍后你可以删除它。添加更多代码以进一步解释

 public class ServiceClass : IServiceClass
{
    public ServiceClass(AuthenticationStateProvider authenticationStateProvider)
    {

        _authenticationStateProvider = authenticationStateProvider;

    }
    private readonly AuthenticationStateProvider _authenticationStateProvider;
    private string authuser = "";
    public async Task<string> GetIdentity()
    {
        var result = "";
        try
        {
            var authState = await _authenticationStateProvider.GetAuthenticationStateAsync();
            var user = authState.User;
            IEnumerable<Claim> claims = user.Claims;

            if (authState != null)
            {
                result = claims.FirstOrDefault(c => c.Type == "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress").Value;
                authuser = result;
            }
            else
                result = authuser;

        }
        catch (Exception ex)
        { System.Diagnostics.Debug.WriteLine(ex.ToSafeString()); }
        return result;
    } 
}

<ReportViewer ViewerId="rv1"
      
          ServiceUrl="/api/reports"
          
        ReportSource="@(new ReportSourceOptions()
                          {
                              Report = "reportAccountingGeneralLedger",
                              Parameters= new Dictionary <string,object>
                              {}
                          })"
          Parameters="@(new ParametersOptions { Editors = new EditorsOptions { MultiSelect = EditorType.ComboBox, SingleSelect = EditorType.ComboBox } })"
          ScaleMode="@(ScaleMode.Specific)"
          Scale="1.0" />

class CustomReportSourceResolver : IReportSourceResolver
{

    public CustomReportSourceResolver(IServiceClass sc, IReportConnectionStringManager csm)
    {
        userClass = sc;
        conStrMan = csm;
        //_scopeFactory = sc;
    }
    private readonly IServiceClass userClass;
    private readonly IReportConnectionStringManager conStrMan;
    public Telerik.Reporting.ReportSource Resolve(string reportName, OperationOrigin operationOrigin, IDictionary<string, object> currentParameterValues)
    {
        var report = string.Empty;
        if (!string.IsNullOrEmpty(reportName))
        {

            using (var context = new DataContext(userClass))
            {
                report = (from table in context.Reports where table.Name == reportName select table.Definition).First();
            }
        }
        ReportSource updatedReport;
        if (string.IsNullOrEmpty(report))
        {
            throw new System.Exception("Unable to load a report with the specified ID: " + reportName);

        }
        else
        {
            XmlReportSource retreivedReport = new Telerik.Reporting.XmlReportSource { Xml = report };
            updatedReport = conStrMan.UpdateReportSource(retreivedReport);
        }
        return updatedReport;
    }
}

 public class DataContext : DbContext
{

    public DataContext(IServiceClass sc)
    {

        serviceClass = sc;
    }
    private readonly IServiceClass serviceClass;
    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer(serviceClass.getUserConnectionString().Result);
    }
object1..object2.. object3....
}