我需要通過(guò)遍歷連接字符串來(lái)進(jìn)行多個(gè)數(shù)據(jù)庫(kù)調(diào)用。數(shù)據(jù)庫(kù)中只有 1 條匹配記錄，如果我找到匹配記錄，那么我可以返回?cái)?shù)據(jù)并取消其他異步調(diào)用。using (var Contexts = instContextfactory.GetContextList()){    foreach(var context in Contexts.GetContextList())    {            // how do I make all the calls and return data from the first call that finds data and continue with further process.(don't care about other calls if any single call finds data.                   context.Insurance.GetInsuranceByANI(ani);    }}通過(guò) ANI 獲取保險(xiǎn)public Task<IEnumerable<Insurance>> GetInsuranceByANI(string ani){    using (ITransaction transaction = Session.Value.BeginTransaction())    {        transaction.Rollback();        IDbCommand command = new SqlCommand();        command.Connection = Session.Value.Connection;        transaction.Enlist(command);        string storedProcName = "spGetInsurance";        command.CommandText = storedProcName;        command.Parameters.Add(new SqlParameter("@ANI", SqlDbType.Char, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Default, ani));        var rdr = command.ExecuteReader();        return Task.FromResult(MapInsurance(rdr));    }}例如：我正在循環(huán)使用 5(a, b, c, d, e) 個(gè)不同的數(shù)據(jù)庫(kù)連接字符串。我需要對(duì)所有 5 個(gè)數(shù)據(jù)庫(kù)進(jìn)行異步調(diào)用。如果我在 db : b 中找到匹配的記錄，那么我可以返回該數(shù)據(jù)并繼續(xù)下一步，并且可以停止調(diào)用其他數(shù)據(jù)庫(kù)