CSharp-Single-EFCore/Bunny.Service/IService/Service/BlogService.cs

using Bunny.Common.Context;
using Bunny.Common.Utils.Net;
using Bunny.Dao.Dto.System;
using Bunny.Dao.Entity.System;
using Bunny.Dao.Model.Result;
using Microsoft.AspNetCore.Components;

namespace Bunny.Service.IService.Service;

public class BlogService : IBlogService
{
    [Inject] public required EfCoreContext DbContext { get; set; }

    /// <summary>
    ///     添加Blog
    /// </summary>
    /// <param name="dto"></param>
    /// <exception cref="NotImplementedException"></exception>
    public void AddBlog(Blog dto)
    {
        DbContext.Add(dto);
        DbContext.SaveChanges();
    }

    /// <summary>
    ///     查询BLog
    /// </summary>
    /// <returns></returns>
    public List<Blog> QueryBlog()
    {
        return DbContext.Blogs.ToList();
    }

    /// <summary>
    ///     更新Blog内容
    /// </summary>
    /// <param name="dto"></param>
    public void UpdateBlog(BlogUpdateDto dto)
    {
        var blog = new Blog();
        NetUtil.CopyProperties(dto, blog);

        DbContext.Blogs.Update(blog);
        DbContext.SaveChanges();
    }

    /// <summary>
    ///     删除BLog
    /// </summary>
    /// <param name="id"></param>
    public void DeleteBlog(string id)
    {
        var blog = new Blog { Id = Guid.NewGuid() };
        DbContext.Blogs.Remove(blog);
        DbContext.SaveChanges();
    }

    /// <summary>
    ///     批量添加数据
    /// </summary>
    /// <param name="url"></param>
    public void AddBatchBlogs(string url)
    {
        var list = new List<Blog>();
        for (var i = 0; i <= 100000; i++)
            list.Add(new Blog
            {
                Url = url,
                CreateTime = DateTime.Now,
                UpdateTime = DateTime.Now,
                UpdateUserId = Random.Shared.Next(),
                CreateUserId = Random.Shared.NextInt64()
            });

        DbContext.Blogs.AddRange(list);
        DbContext.SaveChanges();
    }


    /// <summary>
    ///     批量删除BLog
    /// </summary>
    public void DeleteBatchBlogs()
    {
        var list = new List<Blog>();
        for (var i = 0; i < 10; i++)
        {
            var blog = new Blog();
            list.Add(blog);
        }

        DbContext.Blogs.RemoveRange(list);
        DbContext.SaveChanges();
    }

    /// <summary>
    ///     批量更新_带事务
    /// </summary>
    public void UseTransaction()
    {
        // 还可以使用异步的
        var transaction = DbContext.Database.BeginTransaction();

        // 执行批量更新操作
        var list = new List<Blog>();
        for (var i = 0; i < 10; i++)
        {
            var blog = new Blog { Url = "https://learn.microsoft.com/zh-cn/ef/core/saving/transactions" };
            list.Add(blog);
        }

        // 更新内容
        DbContext.Blogs.UpdateRange(list);
        DbContext.SaveChanges();

        // 还可以使用异步方式
        transaction.Commit();
    }

    /// <summary>
    ///     分页查询
    /// </summary>
    /// <param name="page"></param>
    /// <param name="limit"></param>
    public PageResult<Blog> QueryPage(int page, int limit)
    {
        var items = DbContext.Blogs.Take(limit).Skip(page).ToList();
        var total = items.Count;
        var pages = (int)Math.Ceiling(total / (double)limit);

        var blogs = items.Skip((page - 1) * limit).Take(limit).ToList();

        return new PageResult<Blog>
        {
            PageNo = page,
            Total = total,
            PageSize = limit,
            Pages = pages,
            Data = blogs
        };
    }
}