Window 嵌入式 CE 连接与 SQL Compact in Visual Studio 2008

Question

Solution Explorer is shown in this imageHow can i connect with SQL Compact server database for window CE devices. I have tired it with a simple code.Window CE should connect to the SQL compact server but i am novice user for this technology .This is error on device

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

namespace SQLCompactConnectivity
{
    public partial class Form1 : Form
    {
        //public SqlCeConnection con = new SqlCeConnection(@"Data Source=C:\Users\Administrator\Documents\Users.sdf");

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            String query = "Select * from Instrument";
            String conString = @"Data Source =\Program Files\SQLCompactConnectivity\Data\Music.sdf";
            SqlCeConnection con = new SqlCeConnection(conString);
            SqlCeCommand cmd = new SqlCeCommand(query, con);
            con.Open();
            try
            {
                SqlCeDataReader rdr = cmd.ExecuteReader();
                try
                {
                    while (rdr.Read())
                    {
                        this.label1.Text += string.Format("\r\n ID: {0} Name: {1}", rdr[0].ToString(), rdr[1].ToString());
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                finally
                {
                    rdr.Close();
                }
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.Message);
            }
        }
    }
} 

Answer 1

经过一番研发，我找到了这个问题的答案。错误意味着 DLL 与设备不兼容。 SQL Compact service pack 1 不支持这个。此问题的解决方案是 [安装 SQL Compact Service Pack 2]1 和 Visual Studio 2008。该文件位于 C:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\Devices\System.Data.SqlServerCe.dll 。所以现在从引用中删除您以前的 System.Data.SqlServerCe.dll 并添加 service pack 2 DLL 文件，例如 System.Data.SqlServerCe.dll。我希望这对你们所有人都有效。