c# 连接本地的sdf数据库文件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlServerCe;

namespace testc
{
public partial class Form1 : Form
{
SqlCeConnection sqlceCon = new SqlCeConnection();
SqlCeCommand sqlCeCom = new SqlCeCommand();
DataTable dt = new DataTable();

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
sqlceCon = new SqlCeConnection("Data Source=D:\\test.sdf");
sqlceCon.Open();

SqlCeDataAdapter adptrOdbc = new SqlCeDataAdapter("select * from customers", sqlceCon);
adptrOdbc.Fill(dt);

dataGridView1.DataSource = dt;
}
}
}