Wednesday, 1 February 2012

Pass Multiple Command Parameter on ICommand

Bind multiple parameter on XAML

 <StackPanel Orientation="Horizontal">
        <PasswordBox Width="100" Height="30"  Name="txtPass"></PasswordBox>
            <PasswordBox Width="100" Height="30"  Name="txtPass1"></PasswordBox>
            <Button Height="30" Content="Click" Command="{Binding Cmd}" >
                <Button.CommandParameter>
                    <MultiBinding Converter="{StaticResource conv}">
                        <Binding ElementName="txtPass"></Binding>
                        <Binding ElementName="txtPass1"></Binding>
                    </MultiBinding>
                </Button.CommandParameter>
            </Button>
        </StackPanel>

Converter Class:


public class MyConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            Tuple<PasswordBox, PasswordBox> tuple = new Tuple<PasswordBox, PasswordBox>(
            (PasswordBox)values[0], (PasswordBox)values[1]);
            return (object)tuple;
                   
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }


Create NameSpace for converter

<Window ....
        xmlns:con="clr-namespace:SampleMVVMApp.Converters">
 <Window.Resources>//Add converter into window resource
        <con:EmptyTextValidationConverter x:Key="EmptyTextValidation"></con:EmptyTextValidationConverter>
</Window.Resources>
..........
</Window>

Get all bounded parameter on Icommand Execute Method

Window.Resources

private void CmdExecute(object p)
        {
            var param = (Tuple<PasswordBox, PasswordBox>)p;
            string s=((PasswordBox)param.Item1).Password;
            string ss = ((PasswordBox)param.Item2).Password;
        }






















3 comments:

  1. I read your blog.I thought it was great.. Hope you have a great day. God bless.

    Rica
    www.imarksweb.org

    ReplyDelete
  2. Hi, Thanks for the details. I have a question on this.
    I followed the same way to bind my password box in wpf. But I need to clear the password on usercontrol close (just visibility hidden) and then when user calls password change I have to display cleared fields. But it is not clearing. Please comment and help.
    Thanks in advance

    ReplyDelete
  3. Thank you!! Have been trying to get this to work for hours!!

    ReplyDelete