AjaxCheckboxList

Cascading CheckboxList using binding to parent

The AjaxCheckboxList renders a list of checkboxes, needs an url, js func or controller defined to get data from.
It can be bound to parent controls.

AjaxCheckboxListDemo/Index.cshtml

<h2>Cascading CheckboxList using binding to parent</h2>
@(Html.Awe().AjaxCheckboxListFor(o => o.ParentCategory)
            .Url(Url.Action("GetCategories", "Data")))
@(Html.Awe().AjaxCheckboxListFor(o => o.ChildMeals)
            .Parent(o => o.ParentCategory, "categories")
            .Url(Url.Action("GetMeals", "Data")))

Awesome/DataController.cs

public IActionResult GetCategories()
{
    return Json(Db.Categories.Select(o => new KeyContent(o.Id, o.Name)));
}

public IActionResult GetMeals(int[] categories)
{
    categories = categories ?? new int[] { };
    var items = Db.Meals.Where(o => categories.Contains(o.Category.Id))
        .Select(o => new KeyContent(o.Id, o.Name));

    return Json(items);
}

Ochk

AjaxCheckboxListDemo/Index.cshtml

@(Html.Awe().AjaxCheckboxList("CategoriesOchk")
      .Value(new [] { Db.Categories[0].Id, Db.Categories[1].Id })
      .Ochk()
      .DataFunc(Url.Action("GetCategories", "Data").CacheGetFunc()))

ButtonGroup

AjaxCheckboxListDemo/Index.cshtml

@(Html.Awe().AjaxCheckboxList("CategoriesButtonGroup")
    .ButtonGroup()
    .DataFunc(Url.Action("GetCategories", "Data").CacheGetFunc()))

Multiselect

Parent and Child multiselect, NoSelectClose() set on the child, selected values can be reordered by dragging them

AjaxCheckboxListDemo/Index.cshtml

@(Html.Awe().AjaxCheckboxList("CategoriesMulti")
    .Multiselect()
    .Value(new []{ Db.Categories[0].Id })
    .DataFunc(Url.Action("GetCategories", "Data").CacheGetFunc()))

@(Html.Awe().AjaxCheckboxList("AllMealsMulti")
      .Multiselect(o => o.NoSelectClose())
      .Parent("CategoriesMulti", "categories")
      .Url(Url.Action("GetMeals", "Data")))

Multiselect with custom item

Defining custom rendering functions for the dropdown list item and selected caption

AjaxCheckboxListDemo/Index.cshtml

@(Html.Awe().AjaxCheckboxList("MealsMultiImg")
    .Value(new [] { Db.Meals[0].Id, Db.Meals[2].Id, Db.Meals[14].Id})
    .CssClass("bigMulti")
    .Multiselect(o => o.ItemFunc("awem.imgItem").CaptionFunc("utils.imgCaption").NoSelectClose())
    .DataFunc(Url.Action("GetMealsImg", "Data").CacheGetFunc()))

Awesome/DataController.cs

public IActionResult GetMealsImg()
{
    var url = Url.Content(DemoUtils.MealsUrl);
    var items = Db.Meals
        .Select(o => new MealDisplay(o.Id, o.Name, url + o.Name + ".jpg", o.Category.Id));

    return Json(items);
}

Multichk

AjaxCheckboxListDemo/Index.cshtml

@(Html.Awe().AjaxCheckboxList("MealsMultiChk")
    .Value(new [] { Db.Meals[0].Id, Db.Meals[2].Id, Db.Meals[14].Id})
    .DataFunc(Url.Action("GetMealsImg", "Data").CacheGetFunc())
    .Multichk(o => o.ItemFunc("awem.imgItem")
        .NoSelectClose()
        .ClearBtn()))

Awesome/DataController.cs

public IActionResult GetMealsImg()
{
    var url = Url.Content(DemoUtils.MealsUrl);
    var items = Db.Meals
        .Select(o => new MealDisplay(o.Id, o.Name, url + o.Name + ".jpg", o.Category.Id));

    return Json(items);
}

Multiselect Combo

can add values not present in the select list

AjaxCheckboxListDemo/Index.cshtml

@(Html.Awe().AjaxCheckboxList("AllMealsMultiCombo")
    .Multiselect(o => o.NoSelectClose().Combo())
    .DataFunc(Url.Action("GetMealsImg", "Data").CacheGetFunc()))

Multiselect, with custom css

Remote search, external api

try 'valueinjecter'

Getting data from the git api on search using the SearchFunc. ItemFunc and CaptionFunc are used to specify custom rendering functions for the items and the caption.
Using the same cache key "g1", so searching in one control will populate the other one with data as well.

Shared/Demos/RmtSrcGit.cshtml

@(Html.Awe().AjaxRadioList("GitRepoOdropdown")
          .Load(false)
          .Odropdown(o =>
            o.SearchFunc("site.gitRepoSearch", key: "g1")
             .ItemFunc("site.gitItem")
             .CaptionFunc("site.gitCaption")
             .Caption("select a git repo")))
<span class="hint">try 'valueinjecter'</span>
<br/>
<br/>
@(Html.Awe().AjaxCheckboxList("GitRepoMultiselect")
          .Load(false)
          .Multiselect(o =>
            o.SearchFunc("site.gitRepoSearch", key: "g1")
            .ItemFunc("site.gitItem")
            .CaptionFunc("site.gitCaption")
            .Caption("select a git repo")))

Set value from get items call

setting selected items in the controller by returning AweItems instead of KeyContent[]

AjaxCheckboxListDemo/Index.cshtml

@(Html.Awe().AjaxRadioList("CategorySv")
        .Odropdown(o => o.AutoSelectFirst())
        .DataFunc(Url.Action("GetCategories", "Data").CacheGetFunc()))

@(Html.Awe().AjaxCheckboxList("MealsSv")
        .Parent("CategorySv", "categories")
        .Url(Url.Action("GetMealsSetValue", "Data"))
        .Ochk())

Awesome/DataController.cs

public IActionResult GetMealsSetValue(int[] categories)
{
    categories = categories ?? new int[] { };

    var items = Db.Meals.Where(o => categories.Contains(o.Category.Id)).ToList();

    object value = null;
    if (items.Any())
    {
        value = new[] { items.Skip(1).First().Id };
    }

    return Json(new AweItems
    {
        Items = items.Select(o => new KeyContent(o.Id, o.Name)),
        Value = value
    });
}

Using predefined parameters

setting parameter parent = { Fruits, Legumes } using .Parameter and .ParameterFunc extensions

Events and Api

Showing commonly used client side api methods.
To change the value you simply call jquery .val(newvalue).change().
aweload event is handled to flash the #log div whenever the dropdown loads.
The same api methods can be used for the AjaxDropdown, AjaxRadioList controls and their mods.

AjaxDropdownDemo/Index.cshtml

@{
    var meal1 = Db.Meals[1];
    var meal2 = Db.Meals[2];
}

@(Html.Awe().AjaxDropdown("ddApi")
      .Url(Url.Action("ApiGetMeals", "Data")))

<br />
<br />
@Html.Awe().Button().Text("Change value to " + meal1.Name).OnClick("changeval(" + meal1.Id + ")")
@Html.Awe().Button().Text("Change value to " + meal2.Name).OnClick("changeval(" + meal2.Id + ")")

@Html.Awe().Button().Text("Load only first category").OnClick("loadFirstCat()")
@Html.Awe().Button().Text("Reload").OnClick("reload()")
@Html.Awe().Button().Text("Toggle Enable").OnClick("toggleEnable()")

<br />
<br />

<div id="log">
</div>

<script>
    var dd = $('#ddApi');

    function changeval(newVal) {
        dd.val(newVal).change();
    }

    function reload() {
        dd.data('api').load();
    }

    function loadFirstCat() {
        dd.data('api').load({ oparams: { cat1: true }});
        // oparams sets cat1 just for this call
        // params sets persistent parameters
    }

    function toggleEnable() {
        var o = dd.data('o');
        o.api.enable(!o.enb);
    }
    
    $(function() {
        dd.on('aweload', function(e, data) {
            awe.flash($('#log').html('loaded ' + data.length  + ' items'));
        });
    });
</script>

Awesome/DataController.cs

public IActionResult ApiGetMeals(int? v, bool? cat1)
{
    var items = Db.Meals;

    if (cat1.HasValue && cat1.Value)
    {
        items = items.Where(o => o.Category == Db.Categories[0]).ToList();
    }

    return Json(items.Select(o => new KeyContent(o.Id, o.Name)));
}

Toggle select all

AjaxCheckboxListDemo/Index.cshtml

<div class="ib">
    <button type="button" class="awe-btn" onclick="toggleChkl('chklCatAll')">toggle select all</button>
    <br />
    <br />
    @(Html.Awe().AjaxCheckboxList("chklCatAll").DataFunc(Url.Action("GetCategories", "Data").CacheGetFunc()))
</div>
<div class="ib">
    <button type="button" class="awe-btn" onclick="toggleChkl('chklCatAll2')">toggle select all</button>
    <br />
    <br />
    @(Html.Awe().AjaxCheckboxList("chklCatAll2").DataFunc(Url.Action("GetCategories", "Data").CacheGetFunc()).Ochk())
</div>
<script>
    function toggleChkl(id) {
        var f = $('#' + id).parent();
        f.find(':checkbox').prop('checked', !f.find(':checkbox').first().prop('checked')).change();
    }
</script>

Comments