How to set selected item of a DataGrid programmatically in WPF with MVVM application?

Question

I have bound the DataTable to the DataGrid control. How can I set the selected item programmatically ?

Exam

Answer 1

For anyone using Observable Collections you may find this solution useful.

The SelectedModelIndex property simply returns the index of the SelectedModel from the ItemSource collection. I've found setting the SelectedIndex along with the SelectedItem highlights the row in the DataGrid.

    private ObservableCollection _itemSource
    public ObservableCollection ItemSource
    {
        get { return _itemSource; }
        set 
        { 
            _itemSource = value; 
            OnPropertyChanged("ItemSource"); 
        }
    }

    // Binding must be set to One-Way for read-only properties
    public int SelectedModelIndex
    {
        get 
        {
            if (ItemSource != null && ItemSource.Count > 0)
                return ItemSource.IndexOf(SelectedModel);
            else
                return -1;
        }            
    }

    private Model _selectedModel;
    public Model SelectedModel
    {
        get { return _selectedModel; }
        set 
        {
            _selectedModel = value;
            OnPropertyChanged("SelectedModel"); 
            OnPropertyChanged("SelectedModelIndex");               
        }                
    }