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   源码介绍

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如果你的操作系统是 win64位系统，那么请按照以下提示操作：

首先在这里下载  最新版的 sqlite dll文件，引用到项目中

http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki

记住是这个版本：Precompiled Binaries for 64-bit Windows  以及对应上你的 .net framework环境即可 

另外程序的版本修改成 x64, 右键项目>>生成>>目标平台选择 x64 即可

至此即可使用 

据说：从 System.Data.SQLite, Version=1.0.94.0 这个版本以后 不需要引用SQLite.Interop.dll 这个了，包含到 system.data.sqlite.dll中了

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Configuration;
using System.IO;
using MachineManage.dal;
using System.Data.SQLite;
namespace MachineManage
{
    public partial class FrmMain : Form
    {

        //[DllImport("sqlite3.dll", EntryPoint = "PCFileCopyToDev")]//把计算机文件拷贝到设备
        //public static extern short PCFileCopyToDev(
        //    string PCFileName,
        //    string DevFileName,
        //    bool IsDispProgress,
        //    string Message);





        //private static readonly SQLiteConnection _conn = new SQLiteConnection("Data Source="   frm登录窗体.g_程序目录   "\\Data\\db.dat");




        //private string pathDb = System.Windows.Forms.Application.StartupPath   "\\SQLiteSpy.db3";
        //private string connStringDb = "Provider=System.Data.SQLite;Data Source=SQLiteSpy.db3;Pooling=true;FailIfMissing=false;";
        //private static string s1 = @"Provider=System.Data.SQLite;Data Source=";
        //private static string s2 = Application.StartupPath   "\\SQLiteSpy.db3"   ";";
        //private static string s3 = "Pooling=true;FailIfMissing=false;";
        //public static string StrConn = s1   s2   s3;
        //private static string s1 = @"Data Source=";
        //private static string s2 = Application.StartupPath   "\\SQLiteSpy.db3;" ;//  ";"
        //private static string s3 = "";//;Pooling=true;FailIfMissing=false
        //public static string StrConn =s1 s2 s3;
        public String strConn;
        SQLiteConnection connection = new SQLiteConnection();
        SQLiteCommand command = new SQLiteCommand();
        public FrmMain()
        {
            InitializeComponent();
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
            //SQLiteHelper sqlobj = new SQLiteHelper(StrConn);
            //MessageBox.Show(sqlobj.ConnectionString);
            //MessageBox.Show(Convert.ToString( sqlobj.Execute("select * from Keys")));

            strConn = "test.db3";
            File.Delete("test.db3");
            try
            {
                SQLiteConnection.CreateFile("test.db3");//创建数据库
                //                SQLiteConnection connection = new SQLiteConnection("Data Source=test.db3");//创建一个对test.db3的连接
                connection.ConnectionString = "Data Source="   strConn;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }



        }








    ///<summary>
    ///依据连接串名字connectionName返回数据连接字符串 [读取connectionStrings配置节]
    ///</summary>
    ///<param ></param>
    ///<returns></returns>
    private static string GetConnectionStringsConfig(string connectionName)
    {
        string connectionString =   ConfigurationManager.ConnectionStrings[connectionName].ConnectionString.ToString();
        Console.WriteLine(connectionString);
        return connectionString;
    }


    ///<summary>
    ///更新连接字符串   [更新connectionStrings配置节]
    ///</summary>
    ///<param >连接字符串名称</param>
    ///<param >连接字符串内容</param>
    ///<param >数据提供程序名称</param>
    private static void UpdateConnectionStringsConfig(string newName, string newConString, string newProviderName)
    {
        bool isModified = false;    //记录该连接串是否已经存在
        //如果要更改的连接串已经存在
        if (ConfigurationManager.ConnectionStrings[newName] != null)
        {
            isModified = true;
        }
        //新建一个连接字符串实例
        ConnectionStringSettings mySettings = 
            new ConnectionStringSettings(newName, newConString, newProviderName);
        // 打开可执行的配置文件*.exe.config
        Configuration config = 
            ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
        // 如果连接串已存在，首先删除它
        if (isModified)
        {
            config.ConnectionStrings.ConnectionStrings.Remove(newName);
        }
        // 将新的连接串添加到配置文件中.
        config.ConnectionStrings.ConnectionStrings.Add(mySettings);
        // 保存对配置文件所作的更改
        config.Save(ConfigurationSaveMode.Modified);
        // 强制重新载入配置文件的ConnectionStrings配置节
        ConfigurationManager.RefreshSection("ConnectionStrings");
    }


    ///<summary>
    ///返回*.exe.config文件中appSettings配置节的value项    [读取appStrings配置节]
    ///</summary>
    ///<param ></param>
    ///<returns></returns>
    private static string GetAppConfig(string strKey)
    {
        foreach (string key in ConfigurationManager.AppSettings)
        {
            if (key == strKey)
            {
                return ConfigurationManager.AppSettings[strKey];
            }
        }
        return null;
    }

    ///<summary>
    ///在*.exe.config文件中appSettings配置节增加一对键、值对  [更新appStrings配置节]
    ///</summary>
    ///<param ></param>
    ///<param ></param>
    private static void UpdateAppConfig(string newKey, string newValue)
    {
        bool isModified = false;    
        foreach (string key in ConfigurationManager.AppSettings)
        {
           if(key==newKey)
            {    
                isModified = true;
            }
        }

        // Open App.Config of executable
        Configuration config = 
            ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
        if (isModified)// You need to remove the old settings object before you can replace it
        {
            config.AppSettings.Settings.Remove(newKey);
        }    
        config.AppSettings.Settings.Add(newKey,newValue);    // Add an Application Setting.
        config.Save(ConfigurationSaveMode.Modified); // Save the changes in App.config file.
        ConfigurationManager.RefreshSection("appSettings"); // Force a reload of a changed section.
    }

    //链接数据库
    private void button1_Click(object sender, EventArgs e)
    {
        if (button1.Text == "连接数据库")
        {
            try
            {
                connection.Open();//连接数据库（无法找到066.dll出错的解决方法：将066.dll拷到wince中sqlite程序目录下）
                MessageBox.Show("数据库连接成功");
            }
            catch (Exception ep)
            {
                MessageBox.Show(ep.ToString());
            }
            button1.Text = "关闭数据库";
        }
        else
        {
            try
            {
                connection.Close();//连接数据库（无法找到066.dll出错的解决方法：将066.dll拷到wince中sqlite程序目录下）
                MessageBox.Show("数据库断开连接");
            }
            catch (Exception ep)
            {
                MessageBox.Show(ep.ToString());
            }
            button1.Text = "连接数据库";
        }
    }
    //添加数据表
    private void button2_Click(object sender, EventArgs e)
    {
        //           connection.Open();
        try
        {
            command.Connection = connection;
            command.CommandText = "CREATE TABLE [admin] ([ID] VARCHAR(50),[TEL] VARCHAR(50),[Password] VARCHAR(50));";
            int x = command.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }
    //插入数据
    private void button3_Click(object sender, EventArgs e)
    {
        SQLiteTransaction ta = connection.BeginTransaction();
        try
        {

            for (int i = 0; i < 100; i  )
            {
                command.CommandText = "insert into admin(ID,TEL,Password) VALUES('3','4','5')";
                command.ExecuteNonQuery();
            }

            /*                command.CommandText = "insert into admin(ID,TEL,Password) VALUES('333','444','555')";
                            int x = command.ExecuteNonQuery();*/
            ta.Commit();
        }
        catch (Exception ex)
        {
            ta.Rollback();
            MessageBox.Show(ex.ToString());
        }
    }
    //查找或者显示
    private void button4_Click(object sender, EventArgs e)
    {
        string id, tel, pword = "";
        textBox1.Text = "";
        try
        {
            command.CommandText = "select * from admin";
            //               int x = command.ExecuteNonQuery();
            SQLiteDataReader reader = command.ExecuteReader();//把与command的对应的reader对象转递给reader。
            while (reader.Read())
            {
                id = reader.GetValue(0).ToString();
                tel = reader.GetValue(1).ToString();
                pword = reader.GetValue(2).ToString();
                textBox1.Text  = id   "---"   tel   "---"   pword   "\r\n";
            }
            reader.Close();
            reader.Dispose();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }

    }                               

    
    
    
    
    
    
    
    }
}