将列表中对象的布尔值设置为true

时间:2013-06-25 15:34:50

标签: c# asp.net-mvc razor checkbox

所以我有这个课程,可以让我检查是否选择了颜色:

public class Colors
{
    public bool mIsSelected { get; set; }
    public string mName { get; set; }
}

在将列表发送到视图之前,我使用以下值填充它:

public List<Colors> mListColors = new List<Colors>();

mListColors.Add(new Colors{ mIsSelected = false, mName = "black"});
mListColors.Add(new Colors { mIsSelected = false, mName = "blue" });
mListColors.Add(new Colors { mIsSelected = false, mName = "white" });
mListColors.Add(new Colors { mIsSelected = false, mName = "red" });
mListColors.Add(new Colors { mIsSelected = false, mName = "green" });

在我看来,我这样渲染它们:

@for (int i = 0; i < Model.mListColors.Count; i++)
{
    var item = Model.mListColors[i];

switch (item.mName)
{
    case "black":
        @Html.Image("~\\Images\\Functional\\blackColor.jpeg", item.mName.ToUpper(), null)
        @Html.CheckBoxFor(_item => Model.mListColors[i].mIsSelected, item.mIsSelected)
        @Html.HiddenFor(_item => _item.mListColors[i].mName)
        break;
    case "blue":
        @Html.Image("~\\Images\\Functional\\blueColor.jpeg", item.mName.ToUpper(), null)
        @Html.CheckBoxFor(_item => Model.mListColors[i].mIsSelected, item.mIsSelected)
        @Html.HiddenFor(_item => _item.mListColors[i].mName)
        break;
    case "red":
        @Html.Image("~\\Images\\Functional\\redColor.jpeg", item.mName.ToUpper(), null)
        @Html.CheckBoxFor(_item => Model.mListColors[i].mIsSelected, item.mIsSelected)
        @Html.HiddenFor(_item => _item.mListColors[i].mName)
        break;
    case "green":
        @Html.Image("~\\Images\\Functional\\greenColor.jpeg", item.mName.ToUpper(), null)
        @Html.CheckBoxFor(_item => Model.mListColors[i].mIsSelected, item.mIsSelected)
        @Html.HiddenFor(_item => _item.mListColors[i].mName)
        break;
    case "white":
        @Html.Image("~\\Images\\Functional\\whiteColor.jpeg", item.mName.ToUpper(), null)
        @Html.CheckBoxFor(_item => Model.mListColors[i].mIsSelected, item.mIsSelected)
        @Html.HiddenFor(_item => _item.mListColors[i].mName)
        break;
}

}

因此,如果选中复选框,我可能有一个复选框并将值设置为true或false,具体取决于是否为。 HtmlImage是一个自定义帮助程序,允许我显示图像。

但是,无论是否选中此框,控制器中的值始终为false,那么我该怎么做才能纠正?

3 个答案:

答案 0 :(得分:0)

您的语法有点偏,您将它们全部设置为false。看here

// Assign the result of a boolean expression to b.
b = (days % 2 == 0);

答案 1 :(得分:0)

建立Jason Evans的建议你也可以重构你的代码,这样你就不会违反DRY

@for(int idx = 0;idx < Model.ListColors.Count;idx++)
{
    var item = Model.ListColors[idx]
    @Html.Image(string.Format(
           "~\\Images\\Functional\\{0}Color.jpeg",
           item.Name.ToLower()), item.Name, null)
    @Html.CheckBoxFor(model => Model[idx].IsSelected, item.IsSelected)
    @Html.HiddenFor(model => Model[idk].Name)
}

<强>更新

您可能需要考虑创建一个更准确地反映您数据的模型:

public class Colors
{
    public bool IsSelected {get;set;}
    public string Name {get;set;}
}

将您的模型公开为:

@model IEnumerable<Colors>

答案 2 :(得分:0)

如果我再次出错,请低估,但不应该用Value吗?

@Html.CheckBoxFor(_item => color.Value, Model.mListColors["Blue"].Value)