access数据库取不到数据

Question

我是 c# 新手，当我尝试连接访问数据库时，我得到一个空数据库和空表，尽管它们有数据。

static void Main(string[] args)
{
    String connectioString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\Documents\Documents\School.accdb";
    OleDbConnection MyConn = new OleDbConnection(connectioString);
    MyConn.Open();
    OleDbDataReader reader = null;
    OleDbCommand command = new OleDbCommand("SELECT * FROM Students",MyConn);
    reader = command.ExecuteReader();

    Console.Out.WriteLine(reader["Id_fk"].ToString());

Answer 1

来自documentation for the OleDbDataReader.Read() method：

The default position of the OleDbDataReader is before the first record. Therefore, you must call Read to start accessing any data.

因此，您需要像这样访问结果行的属性：

while (reader.Read())
    Console.Out.WriteLine(reader["Id_fk"].ToString());

access数据库取不到数据

Cant get data from access data base

c#

database

oledb

ms-access