1、安装：
安装SQLite可视化工具，SQLiteStudio.下载地址：SQLite
新建.NET FromWork项目，在NUGet包中安装System.Data.SQLite包。或者直接在引用中添加System.Data.SQLite.dll配置文件。
2、连接数据库
cs
public const string ConfigPath = "D:\\FuyaoGroup\\SQLite_Test\\Config.db";
//数据库成员变量
public SQLiteConnection DBcn_Config; //DB连接对象
public SQLiteDataAdapter DBadp_Config; //作为DataSet与数据库之间的桥梁，用于填充数据(Fill方法)和将修改更新回数据库(Update方法)。
public DataSet DBds_Config; //BD数据临时储存
public SQLiteCommand DBSqlCmd_Config; //表格操作
public void ConnectDataBase()
{
try
{
DBcn_Config = new SQLiteConnection($"Data Source={ConfigPath};Persist Security Info=False");
if (DBcn_Config.State == ConnectionState.Closed) DBcn_Config.Open(); // 打开数据库
string SqlstrConfig = "select * from Sys_Config Order by id DESC"; // 定义查询规则，从下往上
DBadp_Config = new SQLiteDataAdapter(SqlstrConfig, DBcn_Config); // 创建数据适配器
DBds_Config = new DataSet(); // 创建数据集
DBadp_Config.Fill(DBds_Config, "Sys_Config"); // 将数据源中选中的记录填充到数据集
Fig_DBOpen = true;
TB_DBState.Text = "数据库连接成功！";
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
TB_DBState.Text = "数据库连接失败！";
Fig_DBOpen = false;
}
}2、加载数据库中所有表，并在listBox中显示
cs
public void loadRecipe()
{
string sql = "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name";
SQLiteCommand cmd = new SQLiteCommand(sql, DBcn_Recipe);
using (SQLiteDataReader dr = cmd.ExecuteReader())
{
listBox1.Items.Clear();
while (dr.Read())
{
if (dr["name"].ToString() != "sqlite_sequence")
{
listBox1.Items.Add(dr["name"].ToString());
}
}
}
}3、读取数据库中某表
cs
public void ReadRecipe(string Recipe_Table)
{
if (Fig_DBOpen)
{
try
{ //初始化查询变量
string SqlstrRecipe = $"select * from {Recipe_Table} Order by id DESC";
DBadp_Recipe = new SQLiteDataAdapter(SqlstrRecipe, DBcn_Recipe);
DBds_Recipe = new DataSet();
DBadp_Recipe.Fill(DBds_Recipe, Recipe_Table);
//读取数据
TB_Name.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["name"] as object);
TB_Age.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["age"] as object);
TB_Height.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["height"] as object);
TB_Weight.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["weight"] as object);
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
MessageBox.Show("读取失败，请检查数据库连接");
}
}4、新建表，并向表中填充数据
cs
public void WriteRecipe(string Recipe_Table)
{
if (Fig_DBOpen)
{
try
{
string createTableSql = $@"CREATE TABLE IF NOT EXISTS {Recipe_Table} (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name TEXT NOT NULL,
age TEXT,
height TEXT ,
weight TEXT
)";
using (SQLiteCommand cmd = new SQLiteCommand(createTableSql, DBcn_Recipe))
{
cmd.ExecuteNonQuery();
}
string SqlstrRecipe = $"select * from {Recipe_Table} Order by id DESC";
DBadp_Recipe = new SQLiteDataAdapter(SqlstrRecipe, DBcn_Recipe);
DBds_Recipe = new DataSet();
DBadp_Recipe.Fill(DBds_Recipe, Recipe_Table);
SQLiteCommandBuilder DBCmdBd_SysConfig = new SQLiteCommandBuilder(DBadp_Recipe); //使用SQLiteCommandBuilder简化操作
DataRow DataRow_Sys = DBds_Recipe.Tables[Recipe_Table].NewRow(); //在DataSet新增一行
//写入数据
DataRow_Sys["name"] = TB_Name.Text;
DataRow_Sys["age"] = TB_Age.Text;
DataRow_Sys["height"] = TB_Height.Text;
DataRow_Sys["weight"] = TB_Weight.Text;
//新建的Row添加到DataSet
DBds_Recipe.Tables[Recipe_Table].Rows.Add(DataRow_Sys);
//更新DataSet数据缓存到真实数据表中
DBadp_Recipe.InsertCommand = DBCmdBd_SysConfig.GetInsertCommand();
DBadp_Recipe.Update(DBds_Recipe, Recipe_Table);
loadRecipe();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
MessageBox.Show("写入失败，请检查数据库连接");
}
}5、删除某表
cs
public void dropTabRecipe(string Recipe_Table)
{
try
{
string dropTableSql = $"DROP TABLE IF EXISTS {Recipe_Table};";
using (SQLiteCommand cmd = new SQLiteCommand(dropTableSql, DBcn_Recipe))
{
cmd.ExecuteNonQuery();
MessageBox.Show($"表{Recipe_Table}已成功删除。");
loadRecipe();
}
}
catch (Exception ex)
{
MessageBox.Show($"删除表时发生错误: {ex.Message}");
}
}完整代码
cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SQLite;
namespace SQLite_Test
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
ConnectDataBase(); //打开数据库
ReadConfig(); //加载系统信息
loadRecipe(); //加载产品至listBox中
}
#region 变量
//数据库路径
public const string ConfigPath = "D:\\FuyaoGroup\\SQLite_Test\\Config.db";
public const string RecipePath = "D:\\FuyaoGroup\\SQLite_Test\\Recipe.db";
public const string ResultPath = "D:\\FuyaoGroup\\SQLite_Test\\Sys_Result.db";
//数据库成员变量
public SQLiteConnection DBcn_Config; //DB连接对象
public SQLiteDataAdapter DBadp_Config; //作为DataSet与数据库之间的桥梁，用于填充数据(Fill方法)和将修改更新回数据库(Update方法)。
public DataSet DBds_Config; //BD数据临时储存
public SQLiteCommand DBSqlCmd_Config; //表格操作
public SQLiteConnection DBcn_Recipe;
public SQLiteDataAdapter DBadp_Recipe;
public DataSet DBds_Recipe;
public SQLiteCommand DBSqlCmd_Recipe;
public SQLiteConnection DBcn_Result;
public SQLiteDataAdapter DBadp_Result;
public DataSet DBds_Result;
public SQLiteCommand DBSqlCmd_Result;
//系统相关变量
public bool Fig_DBOpen=false;
#endregion
//连接数据库
public void ConnectDataBase()
{
try
{
DBcn_Config = new SQLiteConnection($"Data Source={ConfigPath};Persist Security Info=False");
if (DBcn_Config.State == ConnectionState.Closed) DBcn_Config.Open(); // 打开数据库
string SqlstrConfig = "select * from Sys_Config Order by id DESC"; // 定义查询规则，从下往上
DBadp_Config = new SQLiteDataAdapter(SqlstrConfig, DBcn_Config); // 创建数据适配器
DBds_Config = new DataSet(); // 创建数据集
DBadp_Config.Fill(DBds_Config, "Sys_Config"); // 将数据源中选中的记录填充到数据集
DBcn_Recipe= new SQLiteConnection($"Data Source={RecipePath};Persist Security Info=False");
if (DBcn_Recipe.State == ConnectionState.Closed) DBcn_Recipe.Open();
DBcn_Result = new SQLiteConnection($"Data Source={ResultPath};Persist Security Info=False");
if (DBcn_Result.State == ConnectionState.Closed) DBcn_Result.Open();
string SqlstrResult = "select * from Prods_Result Order by id DESC";
DBadp_Result = new SQLiteDataAdapter(SqlstrResult, DBcn_Result);
DBds_Result = new DataSet();
DBadp_Result.Fill(DBds_Result, "Prods_Result");
Fig_DBOpen = true;
TB_DBState.Text = "数据库连接成功！";
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
TB_DBState.Text = "数据库连接失败！";
Fig_DBOpen = false;
}
}
//*********COnfig***********//
//读公共配置
public void ReadConfig()
{
if (Fig_DBOpen)
{
//重新执行查询（防止数据库已经被改动）
DBadp_Config.SelectCommand.CommandText = "select * from Sys_Config Order by id DESC";
DBds_Config.Clear();
DBadp_Config.Fill(DBds_Config, "Sys_Config");
//读取数据
TB_Shool.Text = Convert.ToString(DBds_Config.Tables["Sys_Config"].Rows[0]["shool"] as object);
TB_Grade.Text = Convert.ToString(DBds_Config.Tables["Sys_Config"].Rows[0]["grade"] as object);
TB_Class.Text = Convert.ToString(DBds_Config.Tables["Sys_Config"].Rows[0]["class"] as object);
TB_Teacher.Text = Convert.ToString(DBds_Config.Tables["Sys_Config"].Rows[0]["teacher"] as object);
}
else
{
MessageBox.Show("读取失败，请检查数据库连接");
}
}
//写公共配置
public void WriteConfig()
{
if (Fig_DBOpen)
{
//使用SQLiteCommandBuilder对操作进行简化，实现增删改操作
SQLiteCommandBuilder DBCmdBd_SysConfig = new SQLiteCommandBuilder(DBadp_Config);
//在DataSet新增一行
DataRow DataRow_Sys = DBds_Config.Tables["Sys_Config"].NewRow();
//写入数据
DataRow_Sys["shool"] = TB_Shool.Text;
DataRow_Sys["grade"] = TB_Grade.Text;
DataRow_Sys["class"] = TB_Class.Text;
DataRow_Sys["teacher"] = TB_Teacher.Text;
//新建的Row添加到DataSet
DBds_Config.Tables["Sys_Config"].Rows.Add(DataRow_Sys);
//更新DataSet数据缓存到真实数据表中
DBadp_Config.InsertCommand = DBCmdBd_SysConfig.GetInsertCommand();
DBadp_Config.Update(DBds_Config, "Sys_Config");
ReadConfig();
}
else
{
MessageBox.Show("写入失败，请检查数据库连接");
}
}
//********Recipe************//
public void loadRecipe()
{
string sql = "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name";
SQLiteCommand cmd = new SQLiteCommand(sql, DBcn_Recipe);
using (SQLiteDataReader dr = cmd.ExecuteReader())
{
listBox1.Items.Clear();
while (dr.Read())
{
if (dr["name"].ToString() != "sqlite_sequence")
{
listBox1.Items.Add(dr["name"].ToString());
}
}
}
}
public void ReadRecipe(string Recipe_Table)
{
if (Fig_DBOpen)
{
try
{ //初始化查询变量
string SqlstrRecipe = $"select * from {Recipe_Table} Order by id DESC";
DBadp_Recipe = new SQLiteDataAdapter(SqlstrRecipe, DBcn_Recipe);
DBds_Recipe = new DataSet();
DBadp_Recipe.Fill(DBds_Recipe, Recipe_Table);
//读取数据
TB_Name.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["name"] as object);
TB_Age.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["age"] as object);
TB_Height.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["height"] as object);
TB_Weight.Text = Convert.ToString(DBds_Recipe.Tables[Recipe_Table].Rows[0]["weight"] as object);
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
MessageBox.Show("读取失败，请检查数据库连接");
}
}
public void WriteRecipe(string Recipe_Table)
{
if (Fig_DBOpen)
{
try
{
string createTableSql = $@"CREATE TABLE IF NOT EXISTS {Recipe_Table} (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name TEXT NOT NULL,
age TEXT,
height TEXT ,
weight TEXT
)";
using (SQLiteCommand cmd = new SQLiteCommand(createTableSql, DBcn_Recipe))
{
cmd.ExecuteNonQuery();
}
string SqlstrRecipe = $"select * from {Recipe_Table} Order by id DESC";
DBadp_Recipe = new SQLiteDataAdapter(SqlstrRecipe, DBcn_Recipe);
DBds_Recipe = new DataSet();
DBadp_Recipe.Fill(DBds_Recipe, Recipe_Table);
SQLiteCommandBuilder DBCmdBd_SysConfig = new SQLiteCommandBuilder(DBadp_Recipe); //使用SQLiteCommandBuilder简化操作
DataRow DataRow_Sys = DBds_Recipe.Tables[Recipe_Table].NewRow(); //在DataSet新增一行
//写入数据
DataRow_Sys["name"] = TB_Name.Text;
DataRow_Sys["age"] = TB_Age.Text;
DataRow_Sys["height"] = TB_Height.Text;
DataRow_Sys["weight"] = TB_Weight.Text;
//新建的Row添加到DataSet
DBds_Recipe.Tables[Recipe_Table].Rows.Add(DataRow_Sys);
//更新DataSet数据缓存到真实数据表中
DBadp_Recipe.InsertCommand = DBCmdBd_SysConfig.GetInsertCommand();
DBadp_Recipe.Update(DBds_Recipe, Recipe_Table);
loadRecipe();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
MessageBox.Show("写入失败，请检查数据库连接");
}
}
public void dropTabRecipe(string Recipe_Table)
{
try
{
string dropTableSql = $"DROP TABLE IF EXISTS {Recipe_Table};";
using (SQLiteCommand cmd = new SQLiteCommand(dropTableSql, DBcn_Recipe))
{
cmd.ExecuteNonQuery();
MessageBox.Show($"表{Recipe_Table}已成功删除。");
loadRecipe();
}
}
catch (Exception ex)
{
MessageBox.Show($"删除表时发生错误: {ex.Message}");
}
}
#region 界面操作
//Config更新
private void BT_UpdataConfig_Click(object sender, EventArgs e)
{
WriteConfig();
}
//Recipe加载
private void BT_RecipeLode_Click(object sender, EventArgs e)
{
if (textBox1.Text != "")
{
ReadRecipe(textBox1.Text);
}
else
{
MessageBox.Show("请选择产品");
}
}
//Recipe保存
private void button4_Click(object sender, EventArgs e)
{
if (textBox1.Text != "")
{
WriteRecipe(textBox1.Text);
}
else
{
MessageBox.Show("请选择产品");
}
}
//Recipe删除
private void button3_Click(object sender, EventArgs e)
{
if (textBox1.Text != "")
{
dropTabRecipe(textBox1.Text);
}
else
{
MessageBox.Show("请选择产品");
}
}
//listBox选择事件
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (listBox1.SelectedItem != null)
{
textBox1.Text = listBox1.SelectedItem.ToString();
}
}
#endregion
}
}完整代码工程：