错误日期格式C＃，Oracle
我试图以正确的格式（日/月/年）获取我的日期。 目前它的格式如下：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）中运行。 只要我在我的应用程序中运行它，我会得到异常：IndexOutOfRange at：
this.InfoList9.Add(dr["start_rcv_datetime"].ToString());
请参阅下面的代码。
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];
}
然后我有一个prev和next按钮以及...
您的IndexOutOfRange异常表明，直接的问题是结果集不包含start_rcv_datetime列 - 可能是因为to_char转换。
不要在数据库端处理字符串。 将该值作为DateTime获取，然后在客户端以任何想要的格式对其进行格式化。
使用dr.GetDateTime获取该值，从查询中删除了to_char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using语句 - 您应该始终确保清理与数据库相关的资源。）
您的第一列没有名称，因此您无法使用"start_rcv_datetime"
直接的解决办法是改变sql来读取
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，您可以简单地从数据库中将日期作为日期时间返回，然后对结果使用string.Format
例如。
this.InfoList.Add(string.Format("{0:dd/MM/yyyy}", dr["start_rcv_datetime"]));