SqlConnection.AccessTokenCallback Properti

Definisi

Ruang nama:

Microsoft.Data.SqlClient

Rakitan:

Microsoft.Data.SqlClient.dll

Paket:

Microsoft.Data.SqlClient v5.2.0

Mendapatkan atau mengatur panggilan balik token akses untuk koneksi.

public:
 property Func<Microsoft::Data::SqlClient::SqlAuthenticationParameters ^, System::Threading::CancellationToken, System::Threading::Tasks::Task<Microsoft::Data::SqlClient::SqlAuthenticationToken ^> ^> ^ AccessTokenCallback { Func<Microsoft::Data::SqlClient::SqlAuthenticationParameters ^, System::Threading::CancellationToken, System::Threading::Tasks::Task<Microsoft::Data::SqlClient::SqlAuthenticationToken ^> ^> ^ get(); void set(Func<Microsoft::Data::SqlClient::SqlAuthenticationParameters ^, System::Threading::CancellationToken, System::Threading::Tasks::Task<Microsoft::Data::SqlClient::SqlAuthenticationToken ^> ^> ^ value); };

public Func<Microsoft.Data.SqlClient.SqlAuthenticationParameters,System.Threading.CancellationToken,System.Threading.Tasks.Task<Microsoft.Data.SqlClient.SqlAuthenticationToken>> AccessTokenCallback { get; set; }

member this.AccessTokenCallback : Func<Microsoft.Data.SqlClient.SqlAuthenticationParameters, System.Threading.CancellationToken, System.Threading.Tasks.Task<Microsoft.Data.SqlClient.SqlAuthenticationToken>> with get, set

Public Property AccessTokenCallback As Func(Of SqlAuthenticationParameters, CancellationToken, Task(Of SqlAuthenticationToken))

Nilai Properti

Func<SqlAuthenticationParameters,CancellationToken,Task<SqlAuthenticationToken>>

Func yang mengambil SqlAuthenticationParameters dan CancellationToken dan mengembalikan SqlAuthenticationToken.

Pengecualian

InvalidOperationException

AccessTokenCallback dikombinasikan dengan konfigurasi autentikasi lain yang bertentangan.

Contoh

Contoh berikut menunjukkan cara menentukan dan mengatur AccessTokenCallback.

using Microsoft.Data.SqlClient;
using Azure.Identity;

class Program
{
    static void Main()
    {
        OpenSqlConnection();
        Console.ReadLine();
    }

    private static void OpenSqlConnection()
    {
        string connectionString = GetConnectionString();
        using (SqlConnection connection = new SqlConnection("Data Source=contoso.database.windows.net;Initial Catalog=AdventureWorks;")
        {
            AccessTokenCallback = async (authParams, cancellationToken) =>
            {
                var cred = new DefaultAzureCredential();
                string scope = authParams.Resource.EndsWith(s_defaultScopeSuffix) ? authParams.Resource : authParams.Resource + s_defaultScopeSuffix;
                var token = await cred.GetTokenAsync(new TokenRequestContext(new[] { scope }), cancellationToken);
                return new SqlAuthenticationToken(token.Token, token.ExpiresOn);
            }
        })
        {
            connection.Open();
            Console.WriteLine("ServerVersion: {0}", connection.ServerVersion);
            Console.WriteLine("State: {0}", connection.State);
        }
    }
}