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Treeview validation

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TreeView

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

Ivan Queiroz asked on 27 Apr 2010, 04:54 PM

This should be pretty straightforward, but for some reason, I cannot get treeview to validate properly: the required field validator fails to see when a node is checked, even if ALL nodes are checked. This is a sample code:

    
                <asp:ValidationSummary ID="ValidationSummary1" runat="server" HeaderText="Please review the following errors:" ShowMessageBox="True" ShowSummary="false" DisplayMode="BulletList" /> 
        
                <telerik:RadTreeView ID="RadTreeViewStates" runat="server" CheckBoxes="true" CheckChildNodes="true" TriStateCheckBoxes="true" LoadingMessage="Loading states" Skin="Office2007"> 
        
                    <Nodes> 
        
                        <telerik:RadTreeNode Checkable="true" Text="All States" Expanded="true"> 
        
                            <Nodes> 
        
                                <telerik:RadTreeNode Checkable="true" Text="Northeast"> 
        
                                    <Nodes> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="CT" Value="CT"></telerik:RadTreeNode> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="MA" Value="MA"></telerik:RadTreeNode> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="ME" Value="CT"></telerik:RadTreeNode> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="NH" Value="CT"></telerik:RadTreeNode> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="NY" Value="CT"></telerik:RadTreeNode> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="PA" Value="CT"></telerik:RadTreeNode> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="RI" Value="CT"></telerik:RadTreeNode> 
        
                                        <telerik:RadTreeNode Checkable="true" Text="VT" Value="CT"></telerik:RadTreeNode> 
        
                                    </Nodes> 
        
                                </telerik:RadTreeNode>                   
        
                            </Nodes> 
        
                        </telerik:RadTreeNode> 
        
                    </Nodes> 
        
                </telerik:RadTreeView> 
        
                <asp:RequiredFieldValidator ID="rvRadTreeViewStates" runat="server" ErrorMessage="Please select at least one state" Display="Dynamic" ControlToValidate="RadTreeViewStates">*</asp:RequiredFieldValidator> 
        
                <asp:Button ID="ButtonSaveSearch" runat="server" Text="Save"  />

The above is similar to the Validation Selection demo. Am I missing something?

Thanks,

Ivan

4 Answers, 1 is accepted

Accepted

answered on 29 Apr 2010, 08:59 AM

Hi Ivan,

The behaviour is expected since the RadTreeViewStates.SelectedValue will be "null" evenif there is some nodes checked. So one suggestion would be selecting/unselecting the node whenever checkbox is checked/unchecked. You can perform this from client side.

JavaScript:

    
            <script type="text/javascript">
 
                function OnClientNodeChecked(sender, args) {
 
                    var node = args.get_node()
 
                    node.set_selected(node.get_checked());
 
                }
 
            </script>

[Attach the OnClientNodeChecked event to RadTreeView]

-Shinu.