ajax - MVC 4 Razor 使用 Ajax 表单更新 foreach 循环

Question

从哪里开始...我可以在互联网上找到类似的东西，但它们似乎从来不符合我想要做某事的特定方式。我尝试过使用或不使用部分 View ，但收效甚微。

快速概述:我有一个带有 Ajax 表单的强类型 View 。在表单下方，我有一个重复代码块的 foreach 循环。我需要能够从表单选择(过滤器)更新代码块。

这是我当前的 View “FindATeacher.cshtml”(在尝试了许多不同的想法之后):

@model Teachers.Models.OmniModel
@{
    ViewBag.Title = "FindATeacher";
    Layout = "~/Views/Shared/_Layout.cshtml";

}
<h2>Find a Teacher</h2>
@using (Ajax.BeginForm("FilterTeachers", "Home", new AjaxOptions { HttpMethod = "Post", OnSuccess = "onSuccess" }))
{
    <div id="ContentFilter">
        <div class="filterLabels">
            <p>Search by Name</p>
            <p>Filter By Instrument</p>
            <p>Filter By City</p>
        </div>
        <div class="filterObjects">
            <p>
                <input type="text" id="nameTXT" />
                <button type="submit" id="findButton">find</button>
            </p>
            <p>@Html.DropDownList("InstrumentID", (SelectList)Model.Instruments, "-- Select an Instrument --", new { id = "instrumentDD" })</p>
            <p>@Html.DropDownList("CityID", (SelectList)Model.Cities, "-- Select a City --", new { id = "cityDD" })</p>
        </div>
    </div>
}
<hr />
@foreach (var r in Model.Teachers)
{
    <div id="ContentResults">
        <div id="avatar">
            <img src="i" />
        </div>

        <div id="demographics">
            <h6>@r.Teacher</h6>
            <strong>@r.StudioName</strong>
            <p><a href="#">@r.URL</a></p>
            <p>@r.StreetAddress</p>
            <p>@r.City, @r.AddressStateID @r.Zip</p>
            <p>@r.Phone</p>
            <p>@r.EmailAddress</p>
        </div>
        <div id="studioDetails">
            <p><strong>Instrument(s) Taught</strong></p>
            <p>
                @{
    var instrumentString = r.Instruments.Aggregate("", (a, b) => a + b.Instrument + ", ");
    if (instrumentString.Length != 0)
    {
        instrumentString = instrumentString.Remove(instrumentString.LastIndexOf(","));
    }
                }
                @instrumentString
            </p>
            <br />

            @if (r.Information != "" && r.Information != null)
            {
                <p><strong>Information</strong></p>
                <p>@r.Information</p>
            }
        </div>
    </div>
}

现在这是我的 Controller 。我在 Controller 中正确返回结果，只是没有更新代码块:

public ActionResult FindATeacher()
        {
            Model.Instruments = new SelectList(TeacherService.GetInstrumentList(0),"InstrumentID","Instrument");
            Model.Cities = new SelectList(TeacherService.GetCityList(),"CityID","City");
            Model.Teachers = TeacherService.GetTeacherList("", 0);
            return View(Model);
        }

        [HttpPost]
        public JsonResult FilterTeachers(String teacherName, String instrumentID, String cityID)
        {
            Model.Teachers = TeacherService.GetTeacherList("John", 0, 0);
            return Json(Model.Teachers);
        }

谢谢。

Answer 1

@VishalVaishya 提出了正确的想法，但有一种更简单的方法，不涉及自定义 JavaScript 代码:AjaxOptions 有一个 UpdateTargetId 属性，AJAX 工具包将解释该属性，表示您希望使用发送的结果更新给定的目标从 Controller 返回。

FindATeacher.cshtml:

@using (Ajax.BeginForm("FilterTeachers", "Home", new AjaxOptions { 
    HttpMethod = "Post", UpdateTargetId = "TeacherList" }))
{
    ...
}
<hr />
<div id="TeacherList">
    @Partial("TeacherList", Model.Teachers)
</div>

TeacherList.cshtml

@model IEnumerable<Teacher>
@foreach(var teacher in Model)
{
   ...
}

Controller 操作:

    [HttpPost]
    public ActionResult FilterTeachers(String teacherName, String instrumentID, String cityID)
    {
        Model.Teachers = TeacherService.GetTeacherList(teacherName, instrumentID, cityID);
        return PartialView("TeacherList", Model.Teachers);
    }