Bind selectedIndex of combobx to Togglebutton c#

Question

I am working on an application for a company - cannot disclose full information on the project but I will try and be descriptive enough. I have a WPF project (C#), I use MVVM, where a user logins in, makes a selection on a combobox, checks Togglebuttons and saves that link by pressing a Button.

For your understanding I will make an example of a team pf players. Combobox has Team A,B,C and the Togglebuttons are the names of the players. User selects Team A and selects players John and Dave for that team and presses save - this is saved to an xml file. When the Togglebutton is checked, it changes color. Now when the user opens the App again, selects Team A from the Combobox, the players that were already selected should appear as checked - change color.How can I achieve this using MVVM? The ViewModel side works fine - I can get the names of players that are linked to current selection of Combobox but I don't know how to bind this to the Togglebutton.

P.S. this link http://www.dotnetlead.com/wpf-organization-chart/application-and-source-code is an example I took this from, it will help you understand what I'm talking about - the selection of the button especially.

Your help will be highly appreciated. Even if it is a theoretical explanation I will figure out the code.

Av Mx · Answer

The requiremets of the project are that I stricly use MVVM meaning I should not have code in the .cs file yes the file is there but I cannot write code in it because of the requirements. I have written my logic in the vm classes.

Ben Chris · Answer

You do have .cs file attach with every .xaml file that makes it VM. You can do the loop thing in the attached .cs file.

Ben Chris · Answer

there is a property called tag associated with every control use that to stroe the unique ID of each player. And check each checkbox one by one in a loop and compare the tag ID with your saved ID the one that matches shoud be set to selected.

Av Mx · Answer

This is what the post is asking - how do I achieve that because I have managed to return the list of players linked to the team but what I need now is logic on how to make the togglebutton select when the combobobx item is selected...I beleive this is something I need to do in the xaml code some binding of sorts but I don't know how to do it...

Ben Chris · Answer

By highlighting I mean that from your existing players list which you are displaying with toggle button you can compare the one's you have saved for team A so when team A is selected from combobox you can write small piece of code to select those player which are associated with team A on your window

Av Mx · Answer

Thanks for the reply. I am already storing the information like that. What I don;t understand is what you mean by highlighting them in the result XML...

Ben Chris · Answer

Since you are storing data in xml this means you need to structure you XML in amanner that while saving information team name is parent node and selected players are child nodes. Then when you select team A from combobox you can highlight those player that are stored under team A in the result XML

Av Mx · Answer

Thanks can I do this loop in the viewmodel? remember I am using mvvm so I do not have code in the .cs file