一. 导言导言 导言 导言 导言

所以在建一个我最初建造的项目时 呼叫标签助手 一种在 HtMX 支持下为结果列表建立简单排序功能的方法 @.}

@..._I 向您介绍 Flippy 表头标签帮助器 many@.} 这只是一篇简短的文章 上面写着很多代码 你总是能看到 这里的样本. 和源代码一如既往 就是在这里.

I'#M相当糟糕的建模例子 @(@it' @sas a sloginnit}){但I'}会试着增加更多, 安装@: @%

dotnet add package mostlylucid.pagingtaghelper

Flippy 标签辅助工具

那么,这是什么东西? ?吗? 嗯,简而言之,它是一个生成表格页眉的方法?

没有 HTMX 整合@) @ 它允许你这样做 @.}

    <sortable-header column="@nameof(FakeDataModel.CompanyCity)"
                             current-order-by="@Model.OrderBy"
                             descending="@Model.Descending"
                             controller="Home"
                             use-htmx="false"
                             action="PageSortTagHelperNoHtmx"
                       >@Html.DisplayNameFor(x => x.Data.First().CompanyCity)
</sortable-header>

您可以在此看到您指定栏名@ , @ 信头的测试, 以及一个寄回@ MPK1_ tanks 的地方 JetBrains . 批注 其中有许多是I' 几乎未触及到给控制者和行动组织的英特利森斯的表面

这将产生一个链接, 并重新连接到 PageSortTagHelperNoHtmx 行动的执行情况以及进一步的行动和 Home 控制器,带有列名称和当前排序顺序以及用“% (” 控制的URL中任何其他参数。 auto-append-querystring Q.}Action @&控制器 您可以很容易地获得一个有用的后退链接@,您会看到下面的 I made it pretty difficult 在这里您可以指定 href {/} 动作\ MSK4. 控制器, 并获取连接到附加的查询字符串参数*.}

    private void AddQueryStringParameters(TagHelperOutput output, bool newDescending)
    {
        string? href = "";

        // If Controller and Action are provided, generate URL dynamically
        if (!string.IsNullOrEmpty(Controller) && !string.IsNullOrEmpty(Action))
        {
            href = Url.ActionLink(Action, Controller);
          
        }
        else if (output.Attributes.ContainsName("href")) // If href is manually set, use it
        {
            href = output.Attributes["href"].Value?.ToString() ?? "";
        }
        if(string.IsNullOrEmpty(href)) throw new ArgumentException("No href was provided or could be generated");
        
        // If AutoAppend is false or href is still empty, don't modify anything
        if (!AutoAppend && !string.IsNullOrWhiteSpace(href))
        {
            output.Attributes.RemoveAll("href");
            output.Attributes.SetAttribute("href", href);
            return;
        }

        // Parse the existing URL to append query parameters
        var queryStringBuilder = QueryString.Empty
            .Add("orderBy", Column)
            .Add("descending", newDescending.ToString().ToLowerInvariant());

        // Preserve existing query parameters from the current request
        foreach (var key in ViewContext.HttpContext.Request.Query.Keys)
        {
            var keyLower = key.ToLowerInvariant();
            if (keyLower != "orderby" && keyLower != "descending") // Avoid duplicating orderBy params
            {
             queryStringBuilder=   queryStringBuilder.Add(key, ViewContext.HttpContext.Request.Query[key]!);
            }
        }
href+= queryStringBuilder.ToString();
        
        // Remove old href and set the new one with the appended parameters
        output.Attributes.RemoveAll("href");
        output.Attributes.SetAttribute("href", href);
    }

这是将查询字符串参数附加到 URL .} It'\ 相当简单的@,\ 的方法, 它基于该方法生成一个 URl Controller 和 Action 设置 href 它的属性将使用该属性@ . @ {如果你已设置 AutoAppend 假而造假,只用 href 属性为 @ (@ moneyign 您可以自己滚动用于特定用途 @ I-_ cases @ MPK2}

疯狂配置

使用“ /” 没有 HTMX @ MSSK1}没有“ I/” 没有尾风 *& DisiUI 等 I'+#ve 给您一个属性 BUNCH, 用于配置此相对简单的控件

    [HtmlAttributeName("hx-controller")]
    [AspMvcController] // Enables IntelliSense for controller names
    public string? HXController { get; set; }

    [HtmlAttributeName("hx-action")]
    [AspMvcAction] // Enables IntelliSense for action names
    public string? HXAction { get; set; }
    
    
    [HtmlAttributeName("action")]
    [AspMvcAction]
    public string? Action { get; set; }
    
    [HtmlAttributeName("controller")]
    [AspMvcController]
    public string? Controller { get; set; }
    
    [ViewContext]
    [HtmlAttributeNotBound]
    public ViewContext ViewContext { get; set; }
    /// <summary>
    /// The column to sort by
    /// </summary>

    [HtmlAttributeName("column")] public string Column { get; set; } = string.Empty;

    /// <summary>
    /// Whether to auto-append any query string parameters
    /// </summary>

    [HtmlAttributeName("auto-append-querystring")] public bool AutoAppend { get; set; } = true;
    
    // <summary>
    /// Whether to use htmx ; specifcally used to set hx-vals
    /// </summary>

    [HtmlAttributeName("use-htmx")] public bool UseHtmx { get; set; } = true;

    /// <summary>
    /// The currently set order by column
    /// </summary>

    [HtmlAttributeName("current-order-by")]
    public string? CurrentOrderBy { get; set; }

    /// <summary>
    /// Sort direction, true for descending, false for ascending
    /// </summary>

    [HtmlAttributeName("descending")] public bool Descending { get; set; }

    
    /// <summary>
    ///  CSS class for the chevron up icon
    /// </summary>

    [HtmlAttributeName("chevron-up-class")]
    public string? ChevronUpClass { get; set; }
    
    /// <summary>
    ///  CSS class for the chevron down icon
    /// </summary>


    [HtmlAttributeName("chevron-down-class")]
    public string? ChevronDownClass { get; set; }
    
    /// <summary>
    /// The CSS class for the chevron when unsorted
    /// </summary>

    
    [HtmlAttributeName("chevron-unsorted-class")]
    public string? ChevronUnsortedClass { get; set; }

    /// <summary>
    /// The CSS class to use for the tag.
    /// </summary>

    [HtmlAttributeName("tag-class")] public string? TagClass { get; set; }

你可以看到,我拥有Pretty MUCH的属性 控制器里所有的东西... '(#IMSSK1'

使用HTMX

现在,你可能已经学到了 I'm 一个HTMX NUT 和往常一样支持 HTMX 非常无缝=:} 它认为: use-htmx 填满在 hx-vals 属性@. @%* 同时我使用 HTMX 标签辅助工具 使代码尽可能简单@. @%

            <sortable-header column="Name"
                             current-order-by="@Model.OrderBy"
                             descending="@Model.Descending"
                             hx-get
                             hx-route-pagesize="@Model.PageSize"
                             hx-route-page="@Model.Page"
                             hx-route-search="@Model.SearchTerm"
                             hx-controller="Home"
                             hx-action="PageSortTagHelper"
                             hx-indicator="#loading-modal"
                             hx-target="#list"
                             hx-push-url="true">@Html.DisplayNameFor(x => x.Data.First().Name)
            </sortable-header>

和好,它的房地产它只是 工程 与 HTMX 无缝无缝@. @

MVC 主计长

然后把这个寄回给一个简单的 MVC 控制器, 它生成了一些样本数据@:

    [Route("PageSortTagHelper")]
    public async Task<IActionResult> PageSortTagHelper(string? search, int pageSize = 10, int page = 1, string? orderBy = "", bool descending = false)
    {
        var pagingModel = await SortResults(search, pageSize, page, orderBy, descending);

        if (Request.IsHtmxBoosted() || Request.IsHtmx())
        {
            return PartialView("_PageSortTagHelper", pagingModel);
        }
        return View("PageSortTagHelper", pagingModel);
    }
    
     private async Task<OrderedPagingViewModel> SortResults(string? search, int pageSize, int page, string? orderBy, bool descending)
    {
        search = search?.Trim().ToLowerInvariant();
        var fakeModel = await dataFakerService.GenerateData(1000);
        var results = new List<FakeDataModel>();

        if (!string.IsNullOrEmpty(search))
            results = fakeModel.Where(x => x.Name.ToLowerInvariant().Contains(search)
                                           || x.Description.ToLowerInvariant().Contains(search) ||
                                           x.CompanyAddress.ToLowerInvariant().Contains(search)
                                           || x.CompanyEmail.ToLowerInvariant().Contains(search)
                                           || x.CompanyCity.ToLowerInvariant().Contains(search)
                                           || x.CompanyCountry.ToLowerInvariant().Contains(search)
                                           || x.CompanyPhone.ToLowerInvariant().Contains(search)).ToList();
        else
        {
            results = fakeModel.ToList();
        }

        if (!string.IsNullOrWhiteSpace(orderBy))
        {
            results = results.OrderByField(orderBy, descending).ToList();
        }

        var pagingModel = new OrderedPagingViewModel();
        pagingModel.TotalItems = results.Count();
        pagingModel.Page = page;
        pagingModel.SearchTerm = search;
        pagingModel.PageSize = pageSize;
        pagingModel.Data = results.Skip((page - 1) * pageSize).Take(pageSize).ToList();
        pagingModel.OrderBy = orderBy;
        pagingModel.Descending = descending;
        return pagingModel;
    }

缩略 OrderByField 推广方法

哦,我有一个小扩展方法包 包装在其中应用一个命名的顺序字段 对数据@(or IQueryable 其它 & ). @ T|}hhe 整个扩展方法都低于 < MS K2} 您可以看到它有“ 3” 的方法@,} 一个用于强打的列名..., 一个用于 I 可查询字符串名称, 一个用于IEVlables

using System.Linq.Expressions;
using System.Reflection;

namespace mostlylucid.pagingtaghelper.Extensions;

public static class QueryableExtensions
{
    public static IQueryable<T> OrderByField<T, TKey>(
        this IQueryable<T> source,
        Expression<Func<T, TKey>> keySelector,
        bool descending = false)
    {
        return descending ? source.OrderByDescending(keySelector) : source.OrderBy(keySelector);
    }


    public static IQueryable<T> OrderByField<T>(
        this IQueryable<T> source,
        string sortBy,
        bool descending = false)
    {
        if (string.IsNullOrWhiteSpace(sortBy))
            return source; // No sorting applied

        var property =
            typeof(T).GetProperty(sortBy, BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance);
        if (property == null)
            throw new ArgumentException($"Property '{sortBy}' not found on type '{typeof(T)}'.");

        var param = Expression.Parameter(typeof(T), "x");
        var propertyAccess = Expression.MakeMemberAccess(param, property);
        var lambda = Expression.Lambda(propertyAccess, param);

        var methodName = descending ? "OrderByDescending" : "OrderBy";

        var resultExpression = Expression.Call(
            typeof(Queryable),
            methodName,
            new[] { typeof(T), property.PropertyType },
            source.Expression,
            Expression.Quote(lambda)
        );

        return source.Provider.CreateQuery<T>(resultExpression);
    }
    
    public static IEnumerable<T> OrderByField<T>(
        this IEnumerable<T> source,
        string sortBy,
        bool descending = false)
    {
        var property = typeof(T).GetProperty(sortPropertyName(sortBy), BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance);
        if (property == null)
            throw new ArgumentException($"Property '{sortBy}' not found on type '{typeof(T)}'.");

        return descending
            ? source.OrderByDescending(x => property.GetValue(x, null))
            : source.OrderBy(x => property.GetValue(x, null));
    }

    // Helper methods for readability (optional)
    private static string sortPropertyName(string sortBy) => sortBy.Trim();
    private static string methodName(bool descending) => descending ? "OrderByDescending" : "OrderBy";
}

在结论中的结论

这真是我需要的东西 所以我把它建成了一个卡在金币包里的套件