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[英]How to find which checkboxes are selected and pass them to ActionResult in MVC?
[英]How to pass the values of the checkboxes to ActionResult in MVC5?
我有一個MVC5應用,在我看來,我有這樣的代碼:
<div class="form-group">
@Html.LabelFor(model => model.CategoryID, "Category", htmlAttributes: new { @class = "control-label col-md-3" })
<div class="col-md-9">
@Html.DropDownList("CategoryID", null, "Please select a category", htmlAttributes: new { @class = "form-control" })
@Html.ValidationMessageFor(model => model.CategoryID, "", new { @class = "text-danger" })
</div>
</div>
<div id="subcatsform" class="form-group" style="visibility:hidden;">
@Html.LabelFor(m => m.Subcategories, new { @class = "col-md-3 control-label" })
<div id="subcats" class="col-md-9">
</div>
</div>
然后,我有一個JavaScript代碼,該代碼根據先前選擇的類別填充子類別。 我通過以下代碼段實現它:
$(function () {
$("#CategoryID").on("change", function () {
var selected_option = $("#CategoryID option").filter(":selected").text();
$("#subcats").empty();
if (selected_option != "Please select a category") {
$("#subcatsform").css("visibility", "visible");
$.ajax({
url: "/Home/GetSubcategories",
dataType: "json",
data: {
cid: $("#CategoryID").val(),
},
success: function (data) {
$.each(data, function (key, value) {
var checkbox = '<input type="checkbox" name="subcategory" value="' + value.id + '"> ' + value.value + '<br />';
$("#subcats").append(checkbox);
});
}
});
}
else
{
$("#subcatsform").css("visibility", "hidden");
}
});
});
關鍵是,直到一切正常為止,並且對於每個選定的類別,我都正確地獲得了子類別的列表,並創建了每個復選框的復選框,其中可以看到的name屬性等於subcategory
,而value
屬性為等於子類別的實際ID。
接下來,我想獲取選中的復選框的value
屬性(意味着選中的子類別),並將其傳遞給我的控制器。 我的ActionResult定義如下:
public async Task<ActionResult> RegisterBusiness(BusinessViewModel model)
在BusinessViewModel
內部,我有一個像這樣的屬性:
public virtual ICollection<Subcategory> Subcategories { get; set; }
最后,我的Subcategory
模型的定義如下:
public class Subcategory
{
public int SubcategoryID { get; set; }
public string SubcategoryName { get; set; }
public string SubcategoryDescription { get; set; }
[ForeignKey("Category")]
[Display(Name = "Category")]
public int CategoryID { get; set; }
public virtual Category Category { get; set; }
[NotMapped]
public bool IsSelected { get; set; }
}
如果有人可以幫助我將所選復選框的值傳遞到RegisterBusiness
ActionResult中,然后將其存儲在我的ICollection<Subcategory> Subcategories
屬性中,我將非常高興。
更改您的RegisterBusiness
Action以采用名為subcategory
的int數組
public async Task<ActionResult> RegisterBusiness(BusinessViewModel model, int[] subcategory)
數組將自動捕獲所選復選框的值。
現在,在回發時,從string[] subcategory
ICollection<Subcategory>
創建ICollection<Subcategory>
並將其分配給Subcategories。
using System.Linq;
...
...
ICollection<Subcategory> Subcategories = subcategory.Select(x => new Subcategory { SubcategoryID = x}).ToList();
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