how to make particular column of datagrid a combobox when AutoGenerateColumns=“True”

Question

I am new to MVVM . I am using wpf with MVVM in my project . So I am testing things right now before diving into an app I need to write.

My page (EmpDetailsWindow.xam

Answer 1

You can do it like this

<DataGrid AutoGeneratingColumn="DataGrid_AutoGeneratingColumn"/>

private void DataGrid_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    if (e.PropertyName == "Gender")
    {
        var cb = new DataGridComboBoxColumn();
        cb.ItemsSource = (DataContext as MyVM).GenderDataTable;
        cb.SelectedValueBinding = new Binding("Gender");
        e.Column = cb;
    }        
}

Answer 2

There doesn't seem to quite be a complete answer here so I'll post what I found from this question and from experimentation. I'm sure this breaks many rules but it's simple and it works

public partial class MainWindow : Window
    {
        // define a dictionary (key vaue pair). This is your drop down code/value
        public static Dictionary<string, string> 
              dCopyType = new Dictionary<string, string>() { 
                 { "I", "Incr." }, 
                 { "F", "Full" } 
              };


// If you autogenerate columns, you can use this event 
// To selectively override each column
// You need to define this event on the grid in the event tab in order for it to be called
private void Entity_AutoGeneratingColumn(object sender,
                                         DataGridAutoGeneratingColumnEventArgs e)
        {

            // The name of the database column
            if (e.PropertyName == "CopyType")
            {
                // heavily based on code above
                var cb = new DataGridComboBoxColumn();
                cb.ItemsSource = dCopyType;  // The dictionary defined above
                cb.SelectedValuePath = "Key";  
                cb.DisplayMemberPath = "Value";
                cb.Header = "Copy Type"; 
                cb.SelectedValueBinding = new Binding("CopyType");
                e.Column = cb;
            }


        }
  } // end public partial class MainWindow