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Problem dragging from right tree to left

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

Jonathan asked on 09 Feb 2009, 11:09 AM

I have two treeviews on a page within RadAjaxPanels (tried this with basic divs to the same result) and have found something a little odd that I could do with a fix for. If I drag an object from the right tree as soon as I enter the left panel I get an error on line 1911, char 1, Error '_145' is null or not an object. After doing some more research I discovered that this only happens when I drag something out of the left edge of RadAjaxPanel2 and into the right edge of RadAjaxPanel1.

e.g. if I drag out of the bottom of RadAjaxPanel2 and onto RadAjaxPanel1 from the right it's fine, if I drag out of the left of RadAjaxPanel2 and into the top edge of RadAjaxPanel1 again it's fine, but if I drag from the left edge of RadAjaxPanel2 onto the right edge of RadAjaxPanel1 I get the error (needs IE to be setup to show all Javascript errors for the error to be obvious).

As a temporary fix I can swap the trees round so that I am dragging from the left tree to the right tree, but this isn't an idea solution, has anyone encountered this before or got any ideas how I can solve this?

Cheers

Jon

    
                <asp:UpdatePanel ID="UpdatePanel1" runat="server">  
        
                    <contentTemplate> 
        
            //CODE REMOVED TO KEEP SIZE DOWN  
        
                        <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" BackColor="Aqua" CssClass="floatLeft">  
        
                            <telerik:RadTreeView ID="RadTreeGroups"  AllowNodeEditing="true" EnableDragAndDrop="true" EnableDragAndDropBetweenNodes="true" OnNodeDrop="RadTreeGroups_NodeDrop" OnNodeEdit="RadTreeGroups_NodeEdit" OnClientContextMenuItemClicked="onClientContextMenuItemClicked" OnContextMenuItemClick="RadTreeGroups_ContextMenuItemClick" runat="server">  
        
                            </telerik:RadTreeView> 
        
                        </telerik:RadAjaxPanel> 
        
                        <telerik:RadAjaxPanel ID="RadAjaxPanel2" runat="server" BackColor="Gray" CssClass="floatRight">  
        
                            <telerik:RadTreeView ID="RadTreeResources"  runat="server" EnableDragAndDrop="true" OnNodeDrop="RadTreeLessons_NodeDrop">  
        
                            </telerik:RadTreeView> 
        
                        </telerik:RadAjaxPanel> 
        
                    </contentTemplate> 

                </asp:UpdatePanel>

    
            .floatRight  
        
            {  
        
                float:right;  
        
                width:48%;  
        
            }  
        
            .floatLeft  
        
            {  
        
                float:left;  
        
                width:48%;  
        
            }

Problem dragging from right tree to left

2 Answers, 1 is accepted