asp.net-mvc – 用于多个复选框表单的ASP.Net MVC6语法

复选框模型

public class CheckboxModel
{
    public int Value { get; set; }
    public string Text { get; set; }
    public bool Checked { get; set; }
}

视图模型

public class MyViewModel
{
   public MyViewModel()
   {
       // populate checkbox collection with defaults here (or in your controller)
   }
   [AtLeastOneRequired(ErrorMessage = "Please check at least one checkbox.")]
   public class List<CheckboxModel> Checkboxes { get; set; }
}

视图

@for (var i = 0; i < Model.Checkboxes.Count; i++)
{
    <div class="checkbox-inline">
        <input type="checkbox" asp-for="@Model.Checkboxes[i].Checked"/>
        <input type="hidden" asp-for="@Model.Checkboxes[i].Text" />
        <input type="hidden" asp-for="@Model.Checkboxes[i].Value" />
        <label asp-for="@Model.Checkboxes[i].Checked">@Model.Checkboxes[i].Text</label>
    </div>
}

我想知道在MVC6中是否有一种比较适合的视图部分,但我还没有找到它.

自定义验证属性

public class AtLeastOneRequiredAttribute : ValidationAttribute
{
    protected override ValidationResult IsValid(object value,ValidationContext context)
    {
        var vm = (MyViewModel) context.ObjectInstance;
        if (vm.Checkboxes.Any(v => v.Checked))
        {
            return ValidationResult.Success;
        }

        return new ValidationResult(ErrorMessage);
    }
}

Controller Action简单地说是：

public async Task<IActionResult> MyControllerAction(MyViewModel vm)

我知道这是一个老问题,但希望这个答案可以帮助别人.