将Viewmodel属性绑定到剃须刀中的所选项目 [英] Binding Viewmodel Property to dropdown selected item in razor

问题描述

public class State
{
    public Guid Id { get; set; }
    public string Name { get; set; }
}
public class Address
{

    public State State { get; set; }

}

public class JobSeeker
{

    public Address CurrentAddress { get; set; }


}

public class RegisterVM
{
    public JobSeeker JobSeeker { get; set; }
    public List<State> AllStates { get; set; }
}

在剃刀中

 @Html.DropDownListFor(m => m.JobSeeker.CurrentAddress.State, 
              new SelectList(Model.AllStates, "Id", "Name" ), "  -----Select List-----  ")

结果是下拉列表中填充了AllStates中存在的值，，但问题是m.JobSeeker.CurrentAddress.State在发布到控制器操作时为null.如何将下拉列表的选定值设置为属性m.JobSeeker.CurrentAddress.State

The result is the drop down is populated with the value present in AllStates, but the problem is m.JobSeeker.CurrentAddress.State is null when posted to controller action. How to set the selected value of dropdown to property m.JobSeeker.CurrentAddress.State

推荐答案

如果将ViewModel更改为...

If you change the ViewModel to...

public class RegisterVM
{
    public JobSeeker JobSeeker { get; set; }
    public List<State> AllStates { get; set; }
    public string SelectedState { get; set; }
}

..并让下拉菜单改用SelectedState属性...

..and have the Drop down use the SelectedState property instead...

@Html.DropDownListFor(m => m.SelectedState, 
              new SelectList(Model.AllStates, "Id", "Name" ), "  -----Select List-----  ")

然后您应该可以按名称将其分配给State.

You should then be able to assign it to the State by name.

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