IQueryable< a> to observableCollection< a>其中a =匿名类型 [英] IQueryable<a> to ObservableCollection<a> where a = anonymous type

问题描述

我想我的listview的datacontext绑定到一个observable集合。现在我有：

I want the datacontext of my listview to be binded to an observable collection. Right now I have:

               // CurrentEmploye = some employee
               Entities.DatabaseModel m = new Entities.DatabaseModel();
               var q = from t in m.TimeSheet                            
                        join emp in m.Employees on t.idEmployee equals emp.id
                        where emp.id == CurrentEmploye.id
                        select new
                        {
                            firstName = emp.firstName,
                            lastName = emp.lastName,
                            position = emp.position,
                            clockInDate = t.clockInDate,
                            clockOutDate = t.clockOutDate,
                        };

                        listView1.DataContext = q;

该代码正确填充listview。现在我想更新listview每当我更新listview项目。

that code populates the listview correctly. Now I will like to update the listview whenever I update a listview item.

我希望变量 q 是类型ObservableCollection，而不必创建一个自定义类，

I will like the variable q to be of type ObservableCollection without having to create a custom class that holds firstName, lastName, position, etc... How can I do that?

推荐答案

你可以欺骗和创建一个方法来做因为方法可以自动推断泛型类型：

You can cheat and create a method to do it for you since methods can infer the generic type automatically:

public ObservableCollection<T> ToObservableCollection<T>(IEnumerable<T> enumeration)
{
    return new ObservableCollection<T>(enumeration);
}

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可帮助您将其创建为扩展方法，因此更易于使用...。

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Oh, and if it helps you can create this as an extension method so it's easier to use... up to you.

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