并非所有变量都已绑定,是怎么回事?
C#连接Oracle总是报错。
oleDbCommand.CommandText = " select * from t where a= :hhhh";
oleDbCommand.Parameters.Add("hhhh",OleDbType.Numeric);
oleDbCommand.Parameters[0].Value = 2;
oleDbConnection.Open();
int i = oleDbCommand.ExecuteNonQuery();
oleDbConnection.Close();
提示:ORA-01008: 并非所有变量都已绑定