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WPF Adding a ComboBox to a DataGrid or List View Based on different DB Tables

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梦谈多话
梦谈多话 2021-01-25 14:29

I would like to add a ComboBox to a DataGrid or ListView but the Combobox\'s underlying ViewSource would be filtered by data

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  • 别那么骄傲
    别那么骄傲 (楼主)
    2021-01-25 14:45

    I would do something like this

    View:

    ViewModel:

    public class MainWindowViewModel
{
    public MainWindowViewModel()
    {
        SelectedItemChangedCommand = new DelegateCommand((selectedItem) => 
        {
            var selected = selectedItem as Company;

            SelectedCompanyPhoneNumbers = selected.CompanyPhoneNumbers;
        });
    }

    public view LoadCompanies()
    {
        // Load the companies information from different tables ...
    }

    public List Companies { get; set; }

    public DelegateCommand SelectedItemChangedCommand { get; set; }

    public List SelectedCompanyPhoneNumbers { get; set; }
}



    Model:
    


    public class Company
{
    public string CompanyName { get; set; }

    public List CompanyPhoneNumbers { get; set; }
}

    


    I used Prism framework in this example. The i and ie are shortcuts to namespaces:
    


    xmlns:i="http://schemas.microsoft.com/expression/2010/interactions"
xmlns:ie="http://schemas.microsoft.com/expression/2010/interactivity"

    


    What happens here is that the viewModel holds a list of the selected company phone numbers. Whenever the company gets changed (a different row in the grid get's selected in this example) the selected company's phone numbers is changed accordingly.
    


    Here are some good links on MVVM:
    


    http://www.codeproject.com/Articles/165368/WPF-MVVM-Quick-Start-Tutorial
    


    http://www.codeproject.com/Articles/126249/MVVM-Pattern-in-WPF-A-Simple-Tutorial-for-Absolute
    


    http://msdn.microsoft.com/en-us/magazine/dd419663.aspx
    


    Good luck
    
    
    
             
    
                                                        
    
            
            
    
              
                
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