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How to get binded ListboxItems from ListView in WPF

Answer 1

+1 A:

The easiest and best way to do this is to expose a property that determines whether the ListViewItem should be enabled or not, and then bind to it:

<ListView>
    <ListView.ItemContainerStyle>
        <Style TargetType="ListViewItem">
            <Setter Property="IsEnabled" Value="{Binding YourProperty}"/>
        </Style>
    </ListView.ItemContainerStyle>
</ListView>

HTH,
Kent

Kent Boogaart 2010-02-22 19:53:31

Thanks, I've thought of something like this but I had three problemswith this approach.1. How to define a custom Property (OK this is really a newbie question)2. I already have a style defined for all the ListViewItems on my application. Does your solution means that I have to have a specific style for these ListViewItems?, and most important, 3. In this particular situation I need one property per ListViewItem and not one general property. Can I bind this from the XmlDataSource?Thanks

jpsstavares 2010-02-22 20:49:23

Answer 2

A:

Well your feedback, combined with other feedback received, allowed me to solve the problem. Thanks very much!

What I did was to add a new attribute, named IsEnable, to the Property in the XmlDataProvider, and then I binded the IsEnabled property of the ListViewItem to this new attribute. So instead of having one global property to define the state of all the ListViewItems, like you suggested, I'll have "individual binds".

To change the data programmatically I used the following method:

provider.Document.SelectSingleNode("//Property[Name=\"Text\"]/IsEnable").InnerText = false.ToString();

This method requires a slightly different format for the data. So the XmlDataProvider is now as following:

        <XmlDataProvider x:Key="Properties" XPath="/Info" IsAsynchronous="False" IsInitialLoadEnabled="True">
        <x:XData>
            <Info xmlns="">
                <Property>
                    <Name>Text</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Tooltip</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Enable</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Visible</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Focus</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Selected</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Count</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Item</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>SelectedText</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>SelectedIndex</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
                <Property>
                    <Name>Complete</Name>
                    <Value></Value>
                    <IsEnable>true</IsEnable>
                </Property>
            </Info>
        </x:XData>
    </XmlDataProvider>

Thanks again for your contribution! José Tavares

jpsstavares 2010-02-24 11:45:53

Answer 3

+1 A:

Kents answer is correct, but I would use a converter, instead of expanding your model:

<ListView>
    <ListView.ItemContainerStyle>
        <Style TargetType="ListViewItem">
            <Setter Property="IsEnabled" Value="{Binding Converter={StaticResource IsEnabledConverter}}"/>
        </Style>
    </ListView.ItemContainerStyle>
</ListView>

And the converter:

public class IsEnabledConverter : IValueConverter
{
    #region IValueConverter Members

    public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        //Implement your logic here, and return true/false accordingly
        return true;
    }

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

    #endregion
}

Arcturus 2010-02-24 12:05:38

Well I see this working though I think I prefer the solution I obtained because the bind is clearer and it doesn't involve additional code. But thanks for the tip, it may be use useful for me in other situations.

jpsstavares 2010-02-24 15:07:15

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How to get binded ListboxItems from ListView in WPF

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