相关疑难解决方法(0)

我最近写了以下代码:

    Task<T> ExecAsync<T>( string connectionString, SqlCommand cmd, Func<SqlCommand, T> resultBuilder, CancellationToken cancellationToken = default(CancellationToken) )
    {
        var tcs = new TaskCompletionSource<T>();

        SqlConnectionProvider p;
        try
        {
            p = GetProvider( connectionString );
            Task<IDisposable> openTask = p.AcquireConnectionAsync( cmd, cancellationToken );
            openTask
                .ContinueWith( open =>
                {
                    if( open.IsFaulted ) tcs.SetException( open.Exception.InnerExceptions );
                    else if( open.IsCanceled ) tcs.SetCanceled();
                    else
                    {
                        var execTask = cmd.ExecuteNonQueryAsync( cancellationToken );
                        execTask.ContinueWith( exec =>
                        {
                            if( exec.IsFaulted ) tcs.SetException( exec.Exception.InnerExceptions );
                            else if( exec.IsCanceled ) tcs.SetCanceled();
                            else
                            {
                                try
                                { …