当AutoGenerateColumns ="True"时,如何使datagrid的特定列成为组合框

Question

我是MVVM的新手.我在我的项目中使用wpf和MVVM.所以我现在正在测试一些东西,然后再深入了解我需要编写的应用程序.

我的页面(EmpDetailsWindow.xaml)是这样的

<Grid>
    <DataGrid Name="dgEmployee" Grid.Row="0" AutoGenerateColumns="True" ItemsSource="{Binding EmployeeDataTable}" CanUserAddRows="True" CanUserDeleteRows="True" IsReadOnly="False"  />
    <Button x:Name="btnSubmit" Content="Submit" Command="{Binding SubmitCommand}" CommandParameter="sample param" HorizontalAlignment="Left" Margin="212,215,0,0" VerticalAlignment="Top" Width="75"/>
</Grid>

我的模型(EmpDetailsWindowViewModel)如下所示

public class EmpDetailsWindowViewModel : INotifyPropertyChanged
    {
        public ICommand SubmitCommand { get; set; }
        public EmpDetailsWindowViewModel()
        {
            EmployeeDataTable = DataTableCreator.EmployeeDataTable();
            GenderDataTable = DataTableCreator.GenderDataTable();
            SubmitCommand = new SubmitCommand();
        }

        DataTable _employeeDataTable;
        public DataTable EmployeeDataTable
        {
            get { return _employeeDataTable;}
            set
            {
                _employeeDataTable = value;
                RaisePropertyChanged("EmployeeDataTable");
            }
        }

        DataTable _genderDataTable;
        public DataTable GenderDataTable
        {
            get { return _genderDataTable; }
            set
            {
                _genderDataTable = value;
                RaisePropertyChanged("GenderDataTable");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;


        public void RaisePropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

datagrid成功绑定到数据表.现在我在datagrid中有一个"Gender"列.这应该是一个组合框,cobobox的项目源来自视图模型的GenderDataTable.我怎样才能做到这一点？

Answer 1

你可以这样做

<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;
    }        
}