B08. BootstrapBlazor实战 Menu 导航菜单使用(2)

接上篇: B08. BootstrapBlazor实战 Menu 导航菜单使用(1)

3.项目模板

节省时间,直接使用 Bootstrap Blazor App 模板快速搭建项目

传送门: https://www.blazor.zone/template

3.1. 安装项目模板

dotnet new -i Bootstrap.Blazor.Templates

3.2. 创建工程

dotnet new bbapp

4. 本次演示使用工程名字 b08Menu ,命令如下

dotnet new bbapp -o b08Menu
dotnet add b08Menu/BootstrapBlazorApp.Shared package FreeSql.Provider.Sqlite
dotnet add b08Menu/BootstrapBlazorApp.Shared package Densen.FreeSql.Extensions.BootstrapBlazor
dotnet sln add b08Menu/BootstrapBlazorApp.Server/BootstrapBlazorApp.Server.csproj
dotnet sln add b08Menu/BootstrapBlazorApp.Shared/BootstrapBlazorApp.Shared.csproj
dotnet sln add b08Menu/BootstrapBlazorApp.WebAssembly/BootstrapBlazorApp.WebAssembly.csproj

注:由于模板使用了共享库,双出Server和WebAssembly工程,我们这里只使用Server工程做演示.

5. 数据服务

添加FreeSql服务到 BootstrapBlazorApp.Server/Program.cs 在 builder.Services.AddBootstrapBlazor(); 之前加入

builder.Services.AddFreeSql(option =>
{
    //demo演示的是Sqlite驱动,FreeSql支持多种数据库，MySql/SqlServer/PostgreSQL/Oracle/Sqlite/Firebird/达梦/神通/人大金仓/翰高/华为GaussDB/MsAccess
    option.UseConnectionString(FreeSql.DataType.Sqlite, "Data Source=test.db;")  //也可以写到配置文件中
#if DEBUG
         //开发环境:自动同步实体
         .UseAutoSyncStructure(true)
         .UseNoneCommandParameter(true)
         //调试sql语句输出
         .UseMonitorCommand(cmd => System.Console.WriteLine(cmd.CommandText))
#endif
    ;
});

传送门: https://github.com/densen2014/Blazor100/wiki/B03.-BootstrapBlazor实战-10分钟编写数据库维护项目

6. Menu数据实体类

使用FreeSql的父子导航属性处理树形分类

传送门: https://github.com/densen2014/Blazor100/wiki/B05.-BootstrapBlazor实战-Tree树形控件使用(2)

新建类文件 Data/WebPages.cs

/// <summary>
/// 页面
/// </summary>
[AutoGenerateClass(Searchable = true, Filterable = true, Sortable = true)]
public class WebPages
{
    public WebPages() { }

    public WebPages(string PageName,  string? Url = null, string? Icon = null, string? Code = "0", List<WebPages>? Childs = null)
    {
        this.PageName = PageName;
        this.Url = Url ?? $"/{PageName}";
        this.Icon = Icon;
        this.Code = Code;
        this.Childs = Childs;
    }

    /// <summary>
    ///代码
    /// </summary>
    [DisplayName("代码")]
    [Column(IsPrimary = true)]
    [AutoGenerateColumn(DefaultSort = true, DefaultSortOrder = SortOrder.Asc)]
    public string? Code { get; set; }

    /// <summary>
    ///父级代码
    /// </summary>
    [DisplayName("父级代码")]
    [Column]
    public string? ParentCode { get; set; }

    [Navigate(nameof(ParentCode))]
    [AutoGenerateColumn(Ignore = true)]
    public WebPages? Parent { get; set; }

    [Navigate(nameof(ParentCode))]
    [AutoGenerateColumn(Ignore = true)]
    public List<WebPages>? Childs { get; set; }

    /// <summary>
    ///页面名称
    /// </summary>
    [Required(ErrorMessage = "{0}不能为空")]
    [DisplayName("页面名称")]
    public string? PageName { get; set; }

    /// <summary>
    ///Icon
    /// </summary>
    [DisplayName("Icon")]
    [AutoGenerateColumn(Visible = false)]
    public string? Icon { get; set; }

    /// <summary>
    ///Url
    /// </summary>
    [Required(ErrorMessage = "{0}不能为空")]
    [DisplayName("Url")]
    [AutoGenerateColumn(Visible = false)]
    public string? Url { get; set; } 

    /// <summary>
    /// 隐藏
    /// </summary>
    [DisplayName ("隐藏")]
    public bool Hide { get; set; } 

}

7. 扩展工具

写文章的时候这个方法已经pr进BootstrapBlazor库,可能读者们看到的时候已经内置次方法了.如果重复,自行跳过这步.

public static class Utility
{
    /// <summary>
    /// 菜单树状数据层次化方法
    /// </summary>
    /// <param name="items">数据集合</param>
    /// <param name="parentId">父级节点</param>
    public static IEnumerable<MenuItem> CascadingMenu(this IEnumerable<MenuItem> items, string? parentId = null) => items.Where(i => i.ParentId == parentId).Select(i =>
    {
        i.Items = CascadingMenu(items, i.Id).ToList();
        return i;
    });
}

8. 菜单界面

找到BootstrapBlazorApp.Shared/Shared/MainLayout.razor文件,展开三角符号,打开MainLayout.razor.cs文件编辑

注入FreeSql

    [Inject]
    [NotNull]
    IFreeSql? fsql { get; set; }

Menus 初始化保存到数据库

using Microsoft.AspNetCore.Components;
using System.Diagnostics.CodeAnalysis;
using BootstrapBlazorApp.Shared.Data;

//private List<MenuItem>? Menus { get; set; }
private List<MenuItem>? Menus { get; set; } = new List<MenuItem>();

   /// <summary>
    /// OnInitialized 方法
    /// </summary>
    protected override void OnInitialized()
    {
        base.OnInitialized();

        //Menus = GetIconSideMenuItems();
    }

    protected override void OnAfterRender(bool firstRender)
    {
        if (firstRender)
        {
            if (fsql.Select<WebPages>().Count() == 0)
            {
                var pages = new List<WebPages>(){
                    new WebPages("首页","/","fa fa-home","001") ,
                    new WebPages("数据","","fa fa-fw fa-database","002",
                        new List<WebPages>(new[] {
                            new WebPages("FetchData","fetchdata","fa fa-fw fa-database","002_001") ,
                            new WebPages( "Counter","counter","fa fa-fw fa-check-square-o","002_002")  ,
                            new WebPages("后台管理","admins","fa fa-gears","002_003") ,
                        })) ,
                    new WebPages("Table","table","fa fa-fw fa-table","004")  ,
                    new WebPages("花名册","users","fa fa-fw fa-users","005")
                };

                var repo = fsql.GetRepository<WebPages>();//仓库类
                repo.DbContextOptions.EnableAddOrUpdateNavigateList = true; //开启一对多，多对多级联保存功能
                repo.Insert(pages);
            }
            Menus =  fsql.Select<WebPages>().OrderBy(a => a.Code)
                        .LeftJoin(d => d.ParentCode == d.Parent!.Code)
                        .ToList(a => new MenuItem()
                        {
                            Text = a.PageName,
                            Id = a.Code,
                            Url = a.Url,
                            ParentId = a.ParentCode,
                            Icon = a.Icon
                        }).CascadingMenu().ToList();
            // 算法获取属性结构数据 .CascadingMenu().ToList()
            StateHasChanged();
        }
    }

到这一步,大家肯定迫不及待要运行一下了,来吧,少年,F5

9. 菜单管理界面

使用Densen.FreeSql.Extensions.BootstrapBlazor库的数据库服务直接表格编辑菜单数据库表格.

先注销模板工程自带演示服务,BootstrapBlazorApp.Server/Program.cs 注销 builder.Services.AddTableDemoDataService();

// 增加 Table 数据服务操作类
//builder.Services.AddTableDemoDataService();

新建BootstrapBlazorApp.Shared/Pages/Admins.razor文件

@page "/admins"
@attribute [TabItemOption(Text = "菜单管理")]
<PageTitle>菜单管理</PageTitle>

<div class="table-users scroll">
    <Table TItem="WebPages"
           IsFixedHeader="true"
           IsPagination="true"
           IsStriped="true"
           AutoGenerateColumns="true"
           ShowSearch="true"
           ShowToolbar="true"
           ShowExtendButtons="true"
           DoubleClickToEdit=true
           ShowColumnList=true
           ShowCardView=true>
    </Table>
</div>

来吧,少年,F5

是不是很有成就感,你怎么这么优秀呢? 哈哈哈.

10.添加菜单

刷新页面

少年, 如期而来!

11.下一篇大概是: Layout 组件