Define custom filter predicate in listview

[kim]

Is it possible to do custom filtering in the listview like it is possible in radgridview?

I want to do a contains filter on an integer column.  But this is not possible. In radgridview this was possible by setting the MasterTemplate.FilterPredicate.

[Julian Benkov]

Hi Kim,

You can achieve this functionality using the DataView property of the root ListViewElement. Here is a simple example:

public partial class ListViewForm1 : Form
{
    public ListViewForm1()
    {
        InitializeComponent();
        radListView1.EnableFiltering = true;
    }

    private void ListViewForm1_Load(object sender, EventArgs e)
    {
        // TODO: This line of code loads data into the 'northwindDataSet.Customers' table. You can move, or remove it, as needed.
        this.customersTableAdapter.Fill(this.northwindDataSet.Customers);

        this.radListView1.ListViewElement.DataView.Filter = MyFilter;
    }

    private bool MyFilter(ListViewDataItem item)
    {
        if (item.Value.ToString().Contains('C'))
        {
            return true;
        }

        return false;
    }
}

For Q2 2011 SP1 release the RadLisView control will has its own FilterPredicate property the make the API easier to use.

All the best,
Julian Benkov
the Telerik team