This is a migrated thread and some comments may be shown as answers.

[Solved] Tree Collapses after check node postback

3 Answers 172 Views

TreeView

This is a migrated thread and some comments may be shown as answers.

3 Answers, 1 is accepted

answered on 09 May 2008, 02:43 PM

Hello Nick, thank you for your reply. Its a bit more complicated, I'll explain.

I am doing a custom control (Composite Control). One of the controls that I display in my custom control is a RadTreeView. The code is as follows:

namespace Altep.Web.Controls
{

        public class WebTree : CompositeControl, ITreeControl
        {
                protected RadTreeView _treeView;

                public WebTree()
                {
                    _treeView = new RadTreeView();
                }

                 ....

                protected override void CreateChildControls()
                {
                    _treeView.ID = TreeID + "_" + this.ID;
                    _treeView.CheckBoxes = true;
                    _treeView.AutoPostBackOnCheck = true;
                    _treeView.AfterClientCheck = "jsAfterCheck";
                    _treeView.NodeCheck += new RadTreeView.RadTreeViewEventHandler(NodeCheckEventHandler);

                    LoadTree(MyDataSource);

                    Controls.Add(_treeView);

                    base.CreateChildControls();
                }

                ....

                protected void NodeCheckEventHandler(object o, RadTreeNodeEventArgs e)
                {
                        //get all checked nodes from tree
                        ArrayList checkedNodeCollection = _treeView.CheckedNodes;

                        foreach(RadTreeNode checkedNode in checkedNodeCollection)
                        {
                                //synch with my model
                         }
                }

                ...

        }
}

On my javascript side, I have the following

function CheckAllChildren(nodes, checked)
{

        for(var i = 0; i < nodes.length; ++i){
            if(checked) nodes[i].Check();
            else nodes[i].UnCheck();

            if(nodes[i].Nodes.length > 0)
                CheckAllChildren(nodes[i].Nodes, checked);
        }

        return;
}

function jsAfterCheck(node)
{

        CheckAllChildren(node.Nodes, node.Checked);

        return;

}

I have the problem of when the node is checked, I get the post back to my NodeCheckEventHandler method, but after exiting, the checked node collapses.

Second problem, the line

ArrayList checkedNodeCollection = _treeView.CheckedNodes;

returns one, even though in my GUI I have the parent and all of its children cheked.

BTW, when AutoPostBackOnCheck = false;

The checked node does not collapse.

Am I missing something? Does rendering the control this way changes things?

Please help