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我正在尝试以正确的格式（dd/mm/yyyy）获取我的日期。目前它的格式为：MM-DD-YYYY HH24:MI:SS 当我将其更改为 dd/mm/yyyy 时，它可以在数据库（Oracle）中使用。一旦我在我的应用程序中运行它，我就会得到异常：IndexOutOfRange at：

this.InfoList9.Add(dr["start_rcv_datetime"].ToString());

请在下面查看我的代码。

public List<String> InfoList = new List<String>();

private void populatelblDate()
{
    conn.Open();
    string query;
    query = "select to_char(dg.start_rcv_datetime,'dd/mm/yyyy') from dc_pallet dp, dc_pallet_stock dps , dc_grv dg , sku s ,prod_size ps,colour c ,purch_order_carton_sku pocs , dc_crane_instruc dci where dps.pallet_id_no = '" + palletId.ToString() + "' and dp.pallet_id_no = dps.pallet_id_no and dg.dc_grv_id_no = dps.dc_grv_id_no and dg.order_no = dps.order_no and dg.company_id_no = dps.company_id_no and s.company_id_no = dps.company_id_no and s.company_id_no = dg.company_id_no and dps.company_id_no = c.company_id_no and dps.company_id_no = ps.company_id_no and s.prod_size_id_no = ps.prod_size_id_no and s.colour_id_no = c.colour_id_no and dps.company_id_no = ps.company_id_no and pocs.order_no = dps.order_no and pocs.carton_code = dps.carton_code and pocs.company_id_no = dps.company_id_no and pocs.sku_id_no = s.sku_id_no and dci.pallet_id_no(+) = dp.pallet_id_no";

    OracleCommand cmd = new OracleCommand(query, conn);
    OracleDataReader dr = cmd.ExecuteReader();
    while (dr.Read())
    {
        this.InfoList.Add(dr["start_rcv_datetime"].ToString());
    }
    dr.Close();
    conn.Close();
}

private void frmInfo_Load(object sender, EventArgs e)
{ 
    populatelblDate();
    lbl1.Text = this.InfoList[0];
}

然后我也有一个上一个和下一个按钮......

4

2 回答 2

6

您的IndexOutOfRange例外表明直接的问题是结果集不包含start_rcv_datetime- 可能是由于to_char转换的列。

根本不要在数据库端处理字符串。将值获取为 a DateTime，然后在客户端将其格式化为您想要的任何格式。

用于dr.GetDateTime获取值，已从to_char查询中删除部分：

query = "select dg.start_rcv_datetime from ...";

using (OracleCommand cmd = new OracleCommand(query, conn))
{
    using (OracleDataReader dr = cmd.ExecuteReader())
    {
        int dateColumn = dr.GetOrdinal("start_rcv_datetime");
        while (dr.Read())
        {
            DateTime date = dr.GetDateTime(0);
            // Or whatever - consider cultural implications
            string text = date.ToString("dd/MM/yyyy");
            InfoList.Add(text);
        }
    }
}

（请注意这些using语句 - 您应该始终确保清理与数据库相关的资源。）

于 2013-02-11T08:30:08.967 回答
0

您的第一列没有名称，因此您无法使用"start_rcv_datetime"

直接的解决方案是将sql更改为读取

query = "select to_char(dg.start_rcv_datetime,'dd/mm/yyyy') as start_rcv_datetime from dc_pallet dp, dc_pallet_stock dps , dc_grv dg , sku s ,prod_size ps,colour c ,purch_order_carton_sku pocs , dc_crane_instruc dci where dps.pallet_id_no = '" + palletId.ToString() + "' and dp.pallet_id_no = dps.pallet_id_no and dg.dc_grv_id_no = dps.dc_grv_id_no and dg.order_no = dps.order_no and dg.company_id_no = dps.company_id_no and s.company_id_no = dps.company_id_no and s.company_id_no = dg.company_id_no and dps.company_id_no = c.company_id_no and dps.company_id_no = ps.company_id_no and s.prod_size_id_no = ps.prod_size_id_no and s.colour_id_no = c.colour_id_no and dps.company_id_no = ps.company_id_no and pocs.order_no = dps.order_no and pocs.carton_code = dps.carton_code and pocs.company_id_no = dps.company_id_no and pocs.sku_id_no = s.sku_id_no and dci.pallet_id_no(+) = dp.pallet_id_no";

但是，您可以简单地将日期作为日期时间从数据库中返回，然后在结果上使用 string.Format

例如。

this.InfoList.Add(string.Format("{0:dd/MM/yyyy}", dr["start_rcv_datetime"]));
于 2013-02-11T08:42:38.427 回答