1、安装SQLite
在 nuget 搜索 System.Data.SQLite 安装
2、在 app.conifg 文件中添加如下信息
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
解决问题：
No Entity Framework provider found for the ADO.NET provider with invariant name ‘System.Data.SQLite’. Make sure the provider is registered in the ‘entityFramework’ section of the application config file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.”
完整的 app.config 文件
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
</startup>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-13.0.0.0" newVersion="13.0.0.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
<entityFramework>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
<remove invariant="System.Data.SQLite" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
</DbProviderFactories>
</system.data>
</configuration>
3、创建 SQLiteContext.cs 文件
using System.Data.Entity;
using System.Data.SQLite;
namespace dbz_desktop_ser.db
{
public class SQLiteContext : DbContext
{
public SQLiteConnection DbConnection {
get; set; }
public DbSet<NetbarInfo> NetbarInfo {
get; set; }
public SQLiteContext(string connectionString) : base(new SQLiteConnection() {
ConnectionString = $@"URI=file:{
connectionString}" }, true)
{
DbConnection = (SQLiteConnection)base.Database.Connection;
}
}
}
4、创建 NetbarInfo.CS 文件 （数据模型）
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace dbz_desktop_ser.dbModel
{
[Table("NetbarInfo")]
public class NetbarInfo
{
[Key]
public int id {
get; set; }
[Column("name")]
public string Name {
get; set; }
}
}
5、创建 NetbarInfoHelper.cs 文件 （增删改查）
using dbz_desktop_ser.dbModel;
using System.Linq;
namespace dbz_desktop_ser.db
{
public class NetbarInfoHelper
{
private readonly SQLiteContext _context;
public NetbarInfoHelper(string connectionString)
{
_context = new SQLiteContext(connectionString);
}
// 查询门店信息
public IQueryable<NetbarInfo> GetNetbarInfo()
{
return _context.NetbarInfo;
}
}
}
6、调用
using dbz_desktop_ser.db;
using System;
using System.Windows.Forms;
namespace dbz_desktop_ser.WinForm
{
public partial class FrmMain : Form
{
public FrmMain()
{
InitializeComponent();
}
private void FrmMain_Load(object sender, EventArgs e)
{
var db = new NetbarInfoHelper("myConfig.db");
var info = db.GetNetbarInfo();
foreach (var item in info)
{
Console.WriteLine($"id：{
item.id} 名称：{
item.Name}");
}
}
}
}
