Dapper GridReader已经处理错误

Question

我正在使用Dapper dot net来执行返回4个结果集的存储过程.我是这样做的:

    public Results Search(Query query)
    {
        if (query == null) throw new ArgumentNullException("query");

        Results results;
        var q = _sqlConnection.QueryMultiple("MySchema.MySproc", query,
                                             commandType: CommandType.StoredProcedure);
        {
            results = q.Read<Results>().First();
            results.CheckAlertResults = q.Read<Results.CheckAlertResult>().ToArray(); // Cannot access a disposed object.Object name: 'GridReader'.
            results.PersonAlertResultRows = q.Read<Results.PersonAlertResultRow>().ToArray();
            results.RoutingAlertResults = q.Read<Results.RoutingAlertResult>().ToArray();
        }

        return results;
    }

第一个结果集只包含1行.它对应于我Results班上的几个原始属性.

其他3个结果集将包含许多行,并将在Results类上填充3个复杂的数组属性.

出于某种原因,我得到了

无法访问已处置的对象.对象名称:'GridReader'.

检查我的代码,看看在哪里.

我已经验证了从使用Linq2Sql的LinqPad调用时该过程正常工作.

我究竟做错了什么？

Answer 1

当读者无法找到更多结果网格时,读者将自行处理; 基本上,你的C#代码看起来很好,但建议你的proc只返回1格.以下工作正常,例如:

using (var reader = connection.QueryMultiple(
    "select 1; select 2 where 1 = 0; select 3 where 1 = 0; select 4;"))
{
    var one = reader.Read<int>().ToArray();
    var two = reader.Read<int>().ToArray();
    var three = reader.Read<int>().ToArray();
    var four = reader.Read<int>().ToArray();
    try { // only returned four grids; expect a fifth read to fail
        reader.Read<int>();
        throw new InvalidOperationException("this should not have worked!");
    }
    catch (ObjectDisposedException) {/* expected; success */}

    one.Length.IsEqualTo(1);
    one[0].IsEqualTo(1);
    two.Length.IsEqualTo(0);
    three.Length.IsEqualTo(0);
    four.Length.IsEqualTo(1);
    four[0].IsEqualTo(4);
}

我可能会尝试改进错误消息,但我怀疑错误是在您的SP中.