wpf SelectedIndex CommandParameter
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28-10-2019 - |
Question
A button's Command is ExcelExportCommand and its CommandParameter is like:
<Button x:Name="ExcelExport" Grid.Row="1" Height="25" Width="100" Command="{Binding ExcelExportCommand}" CommandParameter="{Binding ElementName=ListTabControl, Path=SelectedIndex}">Export to Excel</Button>
How can i get the SelectedIndex through a ViewModel programmatically? I'm new to MVVM pattern and I want to verify that I had taken the right approach. Can you help?
Thanks in advance
Solution
You can bind the SelectedIndex property of your ListTabControl to an integer property in your viewmodel:
<List x:Name="ListTabControl" SelectedIndex="{Binding ListSelectedIndex}" />
private int _ListSelectedIndex;
public int ListSelectedIndex {
get { return _ListSelectedIndex;}
set
{
_ListSelectedIndex = value;
OnPropertyChanged("ListSelectedIndex"); // if INotifyPropertyChanged implemented
}
}
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