public enum SearchType
{
    NetworkObjects,
    Customers
}

public  SearchViewModel()
{
    SearchType = Panels.SearchType.NetworkObjects;

<UserControl.Resources>
    <xpui:ConvertSearchTypeToVisibility x:Key="searchtypetovisibilityconverter" />
</UserControl.Resources>

<ComboBox
            Name="SearchTypeComboBox"
            ItemsSource="{Binding Path=SearchTypes}"
            SelectedItem="{Binding Path=SearchType, Mode=TwoWay}">
...
<DataGrid.Visibility>
   <MultiBinding Converter="{StaticResource searchtypetovisibilityconverter}">
       <Binding RelativeSource="{RelativeSource Self}" Path="Name"/>
           <Binding ElementName="SearchTypeComboBox" Path="SelectedItem" />
   </MultiBinding>
</DataGrid.Visibility>

public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
    string gridName = (string)values[0];
    SearchType searchType = (SearchType)values[1];