CheckboxFor不是嵌套对象绑定 [英] CheckboxFor not binding with nested objects
问题描述
当一个属性嵌套在模型中的对象定义CheckBoxFor是无界?
下面是一个例子。我有一个包含列表℃的
属性。每个 SearchOptions
模式;明星> 星
都有一个编号,名称和应限定的布尔
属性:
公共类SearchOptions
{ 公共SearchOptions()
{
// 默认值
星星=新的List<星GT&()
{
新之星(){总数= 1,名称= Resources.Home.Index.Star1,
IsSelected =虚假},
新之星(){总数= 2,名称= Resources.Home.Index.Star2,
IsSelected =虚假},
新之星(){总数= 3,名称= Resources.Home.Index.Star3,
IsSelected = TRUE},
新之星(){总数= 4,名称= Resources.Home.Index.Star4,
IsSelected = TRUE},
新之星(){数= 5,名称= Resources.Home.Index.Star5,
IsSelected = TRUE},
};
} 公开名单<星GT&;星光{搞定;组; }}
在我的强类型的视图(的 SearchOptions
)我遍历星
属性:
@using(Html.BeginForm(做,家))
{
<&字段集GT;
<传奇> @ MVC3TestApplication.Resources.Home.Index.Search< /传说>
@ {
的foreach(星S IN Model.Stars)
{
@ Html.CheckBoxFor(M = GT; s.IsSelected)
<标签> @ s.Name< /标签> }}
< /字段集>
<输入类型=提交值=Invia/>
}
控制器(相关部分)是:
公众的ActionResult SearchOptions()
{
返回查看(新SearchOptions());
} [HttpPost]
公众的ActionResult DO(SearchOptions S)
{
//做一些东西
返回视图(SearchOptions,S);
}
这是因为你是如何访问在 CheckBoxFor
前pression属性。
@for(INT I = 0; I< Model.Stars.Count();我++){
@ Html.CheckBoxFor(M = GT; m.Stars [I] .IsSelected)
<标签> @ Model.Stars [I] .Name点< /标签>
}
这应该为你工作。
下面是来自不同方法的输出:
//使用循环
<输入ID =Stars_2__IsSelectedNAME =星星[2] .IsSelected类型=复选框VALUE =真/>使用foreach //
<输入检查=选中ID =s_IsSelectedNAME =s.IsSelected类型=复选框VALUE =真/>
您会发现,为的foreach不包含适当的名称为它做匹配模型绑定时。
CheckBoxFor is not bounded when a property is defined in an object nested in the model?
Here is an example. I have a SearchOptions
model that contains a List<Star>
property. Each Star
has a number, a name and a bool
property that should be bounded:
public class SearchOptions
{
public SearchOptions()
{
// Default values
Stars = new List<Star>()
{
new Star() {Number=1, Name=Resources.Home.Index.Star1,
IsSelected=false},
new Star() {Number=2, Name=Resources.Home.Index.Star2,
IsSelected=false},
new Star() {Number=3, Name=Resources.Home.Index.Star3,
IsSelected=true},
new Star() {Number=4, Name=Resources.Home.Index.Star4,
IsSelected=true},
new Star() {Number=5, Name=Resources.Home.Index.Star5,
IsSelected=true},
};
}
public List<Star> Stars { get; set; }
}
In my strongly typed View (of SearchOptions
) i loop over Stars
property:
@using (Html.BeginForm("Do", "Home"))
{
<fieldset>
<legend>@MVC3TestApplication.Resources.Home.Index.Search</legend>
@{
foreach (Star s in Model.Stars)
{
@Html.CheckBoxFor(m => s.IsSelected)
<label>@s.Name</label>
}}
</fieldset>
<input type=submit value="Invia" />
}
The (relevant part of) controller is:
public ActionResult SearchOptions()
{
return View(new SearchOptions());
}
[HttpPost]
public ActionResult Do(SearchOptions s)
{
// Do some stuff
return View("SearchOptions", s);
}
It's because of how you're accessing the properties in the CheckBoxFor
expression.
@for (int i = 0; i < Model.Stars.Count(); i++) {
@Html.CheckBoxFor(m => m.Stars[i].IsSelected)
<label>@Model.Stars[i].Name</label>
}
This should work for you.
Here's the output from the different methods:
//using the for loop
<input id="Stars_2__IsSelected" name="Stars[2].IsSelected" type="checkbox" value="true" />
//using the foreach
<input checked="checked" id="s_IsSelected" name="s.IsSelected" type="checkbox" value="true" />
You'll notice that the for foreach doesn't contain the proper name for it to match to when doing model binding.
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