当我在WPF中选择一行数据网格时，如何在组合框中显示一个值？

Question

I have a daetagrid and a combobox and a textbox in a window in wpf.

in xmal:

<TextBox x:Name="txtCameraName"/>
<ComboBox x:Name="cmbCameraType" SelectedValuePath="Camera_Type" IsEditable="True" IsReadOnly="True" Text="Please select...">
    <ComboBoxItem>IP</ComboBoxItem>
    <ComboBoxItem>webcam</ComboBoxItem>
    <ComboBoxItem>analogue</ComboBoxItem>
</ComboBox>
<DataGrid x:Name="mydgv" SelectionChanged="dgvAddPersonTab_SelectionChanged">
    <DataGrid.Columns>
        <DataGridTextColumn  Binding="{Binding Camera_Name}" Width="80" />
        <DataGridTextColumn  Binding="{Binding Camera_Type}" Width="80" />
    </DataGrid.Columns>

I get all fields of a table named mytbl and show them in datagrid with this code:

    private void window_Loaded(object sender, RoutedEventArgs e)
    {
        var q= from j in CamDB.mytbl select q;
        mydgv.ItemsSource = q.ToList();
    }

and mytbl is a table that it has two field : Camera_Name , Camera_Type . Now I want to show value of Camera_Name in textbox and value of Camera_Type in combo when I select a row of datagrid. I read this link and I tried with following code but it worked about textbox while it didn't work about combo.

    private void mydgv_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var AllFields = mydgv.SelectedItem;
        txtCameraName.Text = AllFields.GetType().GetProperty("Camera_Name").GetValue(AllFields, null).ToString();
        cmbCameraType.SelectedValue = AllFields.GetType().GetProperty("Camera_Type").GetValue(AllFields, null);
    }

Answer 1

我用下面的代码，它的工作原理：

    cmbCameraType.Text = AllFields.GetType().GetProperty("Camera_Type").GetValue(AllFields, null).ToString();

Answer 2

Have you tried binding?

Try adding these to the TextBox and ComboBox in xaml:

<TextBox Text="{Binding ElementName=mydgv,Path=SelectedItem.Camera_Name" />
<ComboBox Text="{Binding ElementName=mydgv,Path=SelectedItem.Camera_Type" />

Other things were omitted.