访问2007查询和c#datatable显示不同的输出

时间:2012-05-30 09:11:50

标签: c# ms-access-2007 oledb

我在access 2007中有以下查询,它使用访问的SQL设计视图给我正确的结果..

  SELECT B1.LAYER_TYPE,
  B1.LAYER_NAME AS LAYER_NAME,
  B2.LAYER_NAME AS RELATED_LAYER_NAME,
  B3.LAYER_NAME AS RELATED_LAYER2_NAME,
  C.RULE_NAME
  FROM (((NCS_RULES_RELATIONS AS A
  LEFT JOIN NCS_LAYERS AS B1 ON A.LAYER_ID = B1.LAYER_ID)
  LEFT JOIN NCS_LAYERS AS B2 ON A.RELTD_LAYER_ID = B2.LAYER_ID)
  LEFT JOIN NCS_LAYERS AS B3 ON A.RELTD_LAYER2_ID = B3.LAYER_ID)
  LEFT JOIN NCS_RULES AS C ON A.RULE_ID = C.RULE_ID
  ORDER BY B1.LAYER_TYPE;

结果如下:

query results in access

但是当我尝试使用c#oledbconnection来访问数据表时,最后一行的RULE_NAME字段值会显示奇怪的结果(参见下图)。

from visualstudio

我的检索表代码如下:

public DataTable GetTable(string strSelectSQL)
        {
            if (this.con.State != ConnectionState.Open)
                con.Open();

            DataTable dt = new DataTable();
            DataSet ds = new DataSet();
            IDbCommand command = con.CreateCommand();
            command.CommandText = strSelectSQL;
            command.Connection = con;

            IDbDataAdapter da = factory.CreateDataAdapter();
            da.SelectCommand = command;
            da.Fill(ds);

            dt = ds.Tables[0];

            con.Close();
            return dt;

        }

有人可以帮我解决这个奇怪的行为吗?

1 个答案:

答案 0 :(得分:2)

似乎一切都很好。我猜您在Rule_name field中有多行值,如下所示:AnnoFromLine\n\rDimOnLine。 Datagridview显示多行值,你可以看到和sql设计视图diplaying只是第一行。