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我已经尝试过尽可能多地插入到 oracle 数据库中。但是当我查询它时，我在数据库中什么也没找到。但它在每次执行非查询时都不会返回对数据库进行的任何操作。请在下面找到我的代码

queryString = "INSERT INTO btable (CH_CODE, ME_NUM, CY_CODE, ER_CODE, SUB_CODE, _LIM, LIM__DATE)" +
    " VALUES ('" + int.Parse(rows["ch_code"].ToString()) + "','" + int.Parse(rows["me_numb"].ToString()) + "','" + int.Parse(rows["cy_code"].ToString()) + "','" + int.Parse(rows["er_code"].ToString()) + "','" + int.Parse(rows["Sub_code"].ToString()) + "','" + double.Parse(rows["_limit"].ToString()) + "'," + "to_date('" + usedate +"','dd/mm/yyyy')" + "')"; 

command = new OracleCommand(queryString, conn);
command.Connection = conn;

if (command.Connection.State == ConnectionState.Closed)
{
    command.Connection.Open();
}
//command.Connection.Open();
command.ExecuteNonQuery();
if (command.ExecuteNonQuery() > 0)
{
    intResult++;
}

连接字符串是

<add key="OraConnString" value="Data Source=testdr.world;Persist Security Info=False;user id=****;password=****"></add>

它在程序中被称为

OracleConnection conn = new OracleConnection(ConfigurationManager.AppSettings["OraConnString"]);
OracleCommand command;

数据库是oracle数据库

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