Question

ViewModel包含以下代码：

public List<MarketingCode> MarketingCodes { get; set; }

MarketingCode的类型为：

public class MarketingCode
{

    public bool selected
    {
        get;
        set;
    }
    public MarketingOptionCode name { get; set; }
    public string Line { get; set; }
    public string value { get; set; }

    [Flags]//Indicates that an enumeration can be treated as a bit field; i.e., as a set of flags
    public enum MarketingOptionCode
    {

        Email = 1,

        Post = 2,

        SMS = 3,

        Telephone = 4
    }

}

我的观点有以下代码来呈现CheckBoxList：

 @for (int i = 0; i < Model.MarketingCodes.Count(); i++)
                                    {
                                        var name = @Model.MarketingCodes[i].name.ToString();
                                        <label for="@Model.MarketingCodes[i].name" class="checkbox inlineblock">
                                            @Html.CheckBoxFor(model => model.MarketingCodes[i].selected, new { name = @Model.MarketingCodes[i].name.ToString(), @id = @Model.MarketingCodes[i].name.ToString() }) **@* This works totally fine, even if you click the label, the checkbox will be checked. *@**

                                            @Model.MarketingCodes[i].name
                                        </label>
                                    }

正如您所看到的，CheckBoxes与所选属性绑定，但在单击CheckBox时，它不会更新为true！如果只有一个CheckBox，相同的方法可以正常工作。但是，当我在控制器中读取属性MarketingCodes的值时，我正在使用循环它不起作用，所有选定的属性都是false。

我从UI获取值的控制器代码：

我编写了这个私有函数，当索引get方法触发时调用，当post方法触发 时，因为viewmodel在发布表单时没有保留任何值。我想这是所有选定属性都设置为false的点。

 private static void BindMarketingOptions(PersonalDetailsIndexViewModel viewModel)
    {
        viewModel.MarketingCodes = new[] { 

            new Bike.ViewModels.MarketingCode { name = Bike.ViewModels.MarketingCode.MarketingOptionCode.Email, Line= "line1", value="value1" },
            new Bike.ViewModels.MarketingCode { name = Bike.ViewModels.MarketingCode.MarketingOptionCode.Post, Line= "line2", value="value2"  },
                new Bike.ViewModels.MarketingCode { name = Bike.ViewModels.MarketingCode.MarketingOptionCode.SMS,Line= "line3", value="value3"  },
                    new Bike.ViewModels.MarketingCode { name = Bike.ViewModels.MarketingCode.MarketingOptionCode.Telephone, Line= "line4", value="value4"  }
                    }.ToList();
    }

我已将上述方法更改为以下方法，以使我选择的属性有效：

private static void BindMarketingOptions(PersonalDetailsIndexViewModel viewModel)
    {
        if (viewModel.MarketingCodes == null)
        {
            viewModel.MarketingCodes = new[] { 

            new Bike.ViewModels.MarketingCode { name = Bike.ViewModels.MarketingCode.MarketingOptionCode.Email, Line= "line1", value="value1"},
            new Bike.ViewModels.MarketingCode { name = Bike.ViewModels.MarketingCode.MarketingOptionCode.Post, Line= "line2", value="value2"},
                new Bike.ViewModels.MarketingCode { name = AQuoteBike.ViewModels.MarketingCode.MarketingOptionCode.SMS,Line= "line3", value="value3"},
                    new Bike.ViewModels.MarketingCode { name = Bike.ViewModels.MarketingCode.MarketingOptionCode.Telephone, Line= "line4", value="value4"}
                    }.ToList();
        }
        for (var i = 0; i < viewModel.MarketingCodes.Count(); i++)
        {
            viewModel.MarketingCodes[i].selected = viewModel.MarketingCodes[i].selected;
        }


    }
BindMarketingOptions(viewModel);
for (var i = 0; i <= viewModel.MarketingCodes.Count(); i++)
                {
                    UserField userField = new UserField();
                    if (viewModel.MarketingCodes[i].selected)  //<--FALSE FOR ALL THE CHECKBOXES
                    {
                        userField.Line = viewModel.MarketingCodes[i].Line;
                        userField.Type = viewModel.MarketingCodes[i].name.ToString();
                        userField.Value = viewModel.MarketingCodes[i].value;  
                        BikeQuote.BikeRisk.UserFields.Add(userField);
                    }
                }

Answer 1

您正在更改每个复选框的name属性 - 这是默认模型绑定器尝试将数据绑定到模型时使用的属性，最好让MVC为您生成，例如。

@for (int i = 0; i < Model.MarketingCodes.Count(); i++)
{
    ...
    Html.CheckBoxFor(model => model.MarketingCodes[i].selected);
    ...
}

Answer 2

答案可以在问题本身中看到。覆盖复选框的名称不是问题，而是我想覆盖名称，以便标签的属性与复选框的名称一起使用。因此，如果用户单击标签，则会单击该复选框。实际问题是我将数据绑定到MarketingCodes属性的方式。我已经给出了旧版本以及更新版本。它现在工作正常。

该复选框不会在mvc应用程序中将bool属性从false更新为true

2 个答案: