2011 Q1 Custom Sorting

[Marc]

Dear,

I would like to customize sorting with the treeview.

For instance I bound treeview to Person class entity list.

Then I would like to sort by firstname or lastname or age.

I tried SortDescriptors without success.

Thanks

Marc

[Marc]

Dear all,

Nobody has a solution ?

I tested and it's working with previous version of TELERIK.

Thanks in advance

Marc

[Julian Benkov]

Hello Marc,

Thank you for contacting us.

Currently, the RadTreeView contol does not support such functionality. The custom sorting and sorting using different properties of a bound object will be ready for our next release Q2 2011, planed for next month.

Let me know if you have further questions.

Best wishes,
Julian Benkov
the Telerik team

[Stephen McDaniel]

Has this been implemented yet?  I just tried updating to Q3 2011 and I'm also having problems doing custom sorting like this.

[Julian Benkov]

Hi Stephen,

The custom sorting and filtering operation for RadTreeView control is available in Q3 2011 SP1 which we have just released. In this version you can write a custom comparer:

public SortedTreeView()
{
    InitializeComponent();

    for (int i = 0; i < 100; i++)
    {

        RadTreeNode radTreeNode = new RadTreeNode(i.ToString());

        radTreeView1.Nodes.Add(radTreeNode);
    }
    for (int i = 0; i < 100; i++)
    {
        for (int j = 0; j < 10; j++)
        {
            RadTreeNode radTreeNode = new RadTreeNode(i.ToString() + "-" + j.ToString());
            radTreeView1.Nodes[i].Nodes.Add(radTreeNode);
        }

    }

    radTreeView1.TreeViewElement.Comparer = new MyComparer(this.radTreeView1.TreeViewElement);
}

private bool FilterNode(RadTreeNode node)
{
    if (node.Text.Length > 1)
    {
        return true;
    }

    return false;
}

private void radButton1_Click(object sender, EventArgs e)
{
    //radTreeView1.SelectedNode.Remove();
    this.radTreeView1.Filter = "Custom";

     if (radTreeView1.SortOrder == SortOrder.None)
     {
         radTreeView1.SortOrder = SortOrder.Ascending;
     }
     else if (radTreeView1.SortOrder == SortOrder.Ascending)
     {
         radTreeView1.SortOrder = SortOrder.Descending;
     }
     else
     {
         radTreeView1.SortOrder = SortOrder.None;
     }
}

class MyComparer : TreeNodeComparer
{
    public MyComparer(RadTreeViewElement treeView)
        :base(treeView)
    {

    }

    public override int Compare(RadTreeNode x, RadTreeNode y)
    {
        if (this.TreeViewElement.SortOrder == SortOrder.Descending)
        {
            return x.Text.CompareTo(y.Text);
        }

        return x.Text.CompareTo(y.Text) * -1;
    }
}

I hope this helps.

Regards,
Julian Benkov
the Telerik team

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