Html.ListBoxFor误差问题asp.mvc 3 [英] Html.ListBoxFor error problem asp.mvc 3

问题描述

我在我的code这样的事情，我得到错误：异常详细信息：System.ArgumentException：值不能为null或空。
参数名：名称。我究竟做错了什么？感谢您的帮助。

I have something like this in my code and I am getting error: Exception Details: System.ArgumentException: Value cannot be null or empty. Parameter name: name . What am I doing wrong ? Thanks for help

@model IEnumerable的＆LT; NHibernateFluentProject.Patient＆GT;

@ Html.ListBoxFor（型号=＆GT;的模式，新的SelectList（型号，ID，名字））;

推荐答案

@ Html.ListBoxFor用于您的强类型视图模型。这将有助于绑定到你的财产。第一部分将采取一个lambda前pression为单个项目作为默认seleced你的列表框，第二部分将采取项目集合来dispaly所有的列表框项目。
例如：你有以下两类

@Html.ListBoxFor is used for your strong typed viewmodel. which could help to bind to your property. First part will take a lambda expression for a single item as a default seleced for your listbox, second part will take the item collections to dispaly all the listbox items. For example: you have following two classes.

public class HospitalViewModel
{
    public string SelectedPatient { get; set; }
    public IEnumerable<Patient> AllPatients { get; set; }
}
public class Patient
{
    public int Id { get; set; }
    public string FirstName { get; set; }
}

从您查看，你应该做这样的事情。

From you view, you should do something like

@model HospitalViewModel

@Html.ListBoxFor(model => model.SelectedPatient, new SelectList(Model.AllPatients,"Id", "FirstName"));

或者如果你只希望将所有的病人绑定到一个列表框，然后用Html.ListBox代替

OR if you only want to bind all your patients to a listbox, then use Html.ListBox instead

@model IEnumerable<Patient>

@Html.ListBox("ListBoxName", new SelectList(Model,"Id", "FirstName"));

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