Question

在c＃中，我尝试使用以下行插入和更新表：

OracleDataAdapter da = new OracleDataAdapter(query, connection);
da.Fill(ds);

这很有效。

但是，我需要知道如何在更新时插入行数。查询类似于

insert into someTable Values(...)

Answer 1

如果不运行单独的count（*）查询，则无法知道记录集计数。这是设计的。 DataReader和DataAdapter是只读的，只读。

您可以尝试使用下面的替代方法来获取受影响的行。

public bool UploadBulkData(List<CustomerDTO> bulkData)
    {
        bool returnValue = false;
        try
        {

            string query = @"insert into PCMS.Customer ( surname, firstName, emailAddress) values 
                            (:surname, :firstName, :emailAddress)";
            oracleConnection.Open();
            using (var command = oracleConnection.CreateCommand())
            {
                command.CommandText = query;
                command.CommandType = CommandType.Text;
                command.BindByName = true;
              // In order to use ArrayBinding, the ArrayBindCount property
              // of OracleCommand object must be set to the number of records to be inserted
                command.ArrayBindCount = bulkData.Count;
                command.Parameters.Add(":surname", OracleDbType.Varchar2, bulkData.Select(c => c.Surname).ToArray(), ParameterDirection.Input);
                command.Parameters.Add(":firstName", OracleDbType.Varchar2, bulkData.Select(c => c.FirstName).ToArray(), ParameterDirection.Input);
                command.Parameters.Add(":emailAddress", OracleDbType.Varchar2, bulkData.Select(c => c.EmailAddress).ToArray(), ParameterDirection.Input);
                int result = command.ExecuteNonQuery();
                **result is what you need**
            }

        }
        catch (OracleException ex)
        {
            //Log error thrown
        }
        finally
        {
            oracleConnection.Close();
        }
        return returnValue;
    }

oracle，插入/更新的行数

1 个答案: