OracleBulkCopy不会向表中插入条目

Question

这是我正在执行的代码:

public static void Main(string[] args)
{
    var connectionString = "Data Source=dbname;User Id=usrname;Password=pass;";
    DataTable dt = new DataTable("BULK_INSERT_TEST");
    dt.Columns.Add("N", typeof(double));
    var row = dt.NewRow();
    row["N"] = 1;
    using (var connection = new OracleConnection(connectionString)){
        connection.Open();
        using(var bulkCopy = new OracleBulkCopy(connection, OracleBulkCopyOptions.UseInternalTransaction))
        {
            bulkCopy.DestinationTableName = dt.TableName;
            bulkCopy.WriteToServer(dt);
        }
    }

    using (var connection = new OracleConnection(connectionString)){
        connection.Open();
        var command = new OracleCommand("select count(*) from BULK_INSERT_TEST", connection);
        var res = command.ExecuteScalar();
        Console.WriteLine(res); // Here I'm getting 0
    }
}

它用于OracleBulkCopy向表中插入1个条目,然后计算表中的行数.我为什么要0排？这是表的结构:

-- Create table
create table BULK_INSERT_TEST
(
  n NUMBER
)

Answer 1

您实际上没有将行添加到表中.您已使用该表创建具有正确列的新行,但实际上并未将其添加到表中.你需要:

dt.Rows.Add(row);

(在你的第一个using陈述之前,基本上)