开发者

Repeating control n times and binding each instance

开发者 https://www.devze.com 2023-03-17 01:22 出处:网络
I am trying to figure out a less messy way of repeating a control n times, depending on a bound model\'s property value. The first m of n controls should be displayed differently however, whereas m is

I am trying to figure out a less messy way of repeating a control n times, depending on a bound model's property value. The first m of n controls should be displayed differently however, whereas m is bound to a different property of the ViewModel. To illustrate the problem, consider I am having a ViewModel like this (n being Display and m Checked here):

public class MyViewModel : ViewModelBase {
    public int Display { get; set; }
    public int Checked { get; set; }
    /* ... */
}

For Display = 5, Checked = 3, the view should render something along the lines of:

(X) (X) (X) ( ) ( )

Each (X) and ( ) should be instances of the same child 开发者_开发问答view type. Now, when the user clicks on the fifth (last) control, Checked should be set to 5 and the View would now display

(X) (X) (X) (X) (X)

Now I could achieve this by hooking up a few event handlers and programmatically adding and binding ( ) instances whenever Display changes. I do wonder though if there is a more concise, lessy messy method to achieve this.


Think of the ViewModel as a model of the View. So if you want to show a collection of items in the view you have to provide that collection on the ViewModel.

In this case add a collection to the ViewModel that changes when the value for Display and Checked changes. Then bind an ItemsControl to the collection and provide an ItemTemplate for the items.

0

精彩评论

暂无评论...
验证码 换一张
取 消