以编程方式在列表框中选择一个项目

Question

I have three ListBoxes ( CompanyName , Representative & QuoteNumber ) and I load data from my WCF client, into the CompanyName list box using the method below:

private async Task LoadCompanies()
{
    using (TruckServiceClient client = new TruckServiceClient())
    {
        var companies = await client.GetCompaniesAsync();
        foreach (var company in companies)
            lbxCompanyName.Items.Add(new ListBoxViewItem<Company>(company));
    }
}

Now in the coding below I allow myself to select the Company Name in the lbxCompanyName ListBox and then viewing the Representatives that belongs to that Company in my lbxRepresentative ListBox.

private void lbxCompanyName_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    var company = (ListBoxViewItem<Company>)lbxCompanyName.SelectedItem; //Changing this line to auto select an Item for me
    foreach (var rep in company.Item.Represetatives)
        lbxRepresentatives.Items.Add(new ListBoxViewItem<Represetative>(rep));
} 

What I want to achieve is to auto/programmatically select the name, let's say "Josh", from the CompanyName ListBox. How would I go about doing this with the coding that I have now?

Basically I want to hide my listboxes and let my program select everything for me.

Answer 1

With data binding you can bind the ItemsSource and SelectedItem

Then you can just assign the SelectedItem in code behind
You most likely will need to implement INotifyPropertyChanged

And you can populate Representative with binding
But what you have is strange - you just keep added Represetatives with each SelectionChanged

Answer 2

For testing purposes I solved my issue by setting my first two ListBoxes (CompanyName, Representative) SelectedIndex to 0 and then using the coding below for my last ListBox (QuoteNumber) to select the last inserted row in my QuoteNumber listbox.

    if (lbxQuoteNumber.Items.Count > -1)
        lbxQuoteNumber.SelectedIndex = lbxQuoteNumber.Items.Count - 1;

Thanks for all the help dudes! :)