C# 在OracleCommand插入到中后,如何检索sys_guid()的值
我想检索某个列的值,该列在事务中包含Oracle db生成的sys\u guid()C# 在OracleCommand插入到中后,如何检索sys_guid()的值,c#,sql,oracle,devart,C#,Sql,Oracle,Devart,我想检索某个列的值,该列在事务中包含Oracle db生成的sys\u guid() public string GetGUID(OracleConnection connection) { string guid = ""; connection.Open(); OracleCommand cmd = new OracleCommand(); OracleTransaction transaction; transaction = connection.BeginTra
public string GetGUID(OracleConnection connection)
{
string guid = "";
connection.Open();
OracleCommand cmd = new OracleCommand();
OracleTransaction transaction;
transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
cmd.Transaction = transaction;
cmd.Connection = connection;
try
{
cmd = connection.CreateCommand();
cmd.CommandText = "INSERT INTO CUSTOMERS (NAME,DETAILS) VALUES (:nm, :dts)";
cmd.Parameters.Add("nm", OracleDbType.VarChar);
cmd.Parameters["nm"].Value = name;
cmd.Parameters.Add("dts", OracleDbType.VarChar);
cmd.Parameters["dts"].Value = details;
cmd.Prepare();
OracleDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
}
reader.Close();
transaction.Commit();
}
catch (Exception e)
{
transaction.Rollback();
Console.WriteLine(e.Message);
}
return guid;
}
表客户具有使用SYS\u guid()创建guid的列顺序,如何检索该guid?try
returning。。进入
,例如
“插入客户(名称、详细信息)值(:nm,:dts)并将\“订单\”返回到:orderid”
侧节点:您没有要读取的内容,这就是为什么cmd.ExecuteNonQuery()代码>抱歉误导:orderid,我已更正。我没有在订单列中插入任何值,我使用sys\u guid()离开Oracle数据库来填充它。工作非常出色,我使用了查询“插入到客户(名称、详细信息)值(:nm,:dts)将订单返回到:orderid”,但没有@前缀。谢谢!
...
using (OracleCommand cmd = connection.CreateCommand()) {
cmd.CommandText =
@"INSERT INTO CUSTOMERS (
NAME,
DETAILS)
VALUES (
:nm,
:dts)
RETURNING
""ORDER"" INTO :orderid";
cmd.Parameters.Add("nm", OracleDbType.VarChar);
cmd.Parameters["nm"].Value = name;
cmd.Parameters.Add("dts", OracleDbType.VarChar);
cmd.Parameters["dts"].Value = details;
cmd.Parameters.Add("orderid", OracleDbType.VarChar);
cmd.Parameters["orderid"].Direction = ParameterDirection.Output;
try {
cmd.ExecuteNonQuery(); // Just execute, nothing to read
transaction.Commit();
guid = Convert.ToString(cmd.Parameters["orderid"].Value);
}
catch (Exception e) { //TODO: put more specific exception type
transaction.Rollback();
Console.WriteLine(e.Message);
}
return guid;
}
...