Treeview validation

[Ivan Queiroz]

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

[Yana]

Hi Ivan,

By default RequiredFieldValidator validates whether a node is selected. This help article explains how you can validate by checked nodes.

Best wishes,
Yana
the Telerik team

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[Shinu]

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.

[Michael Love]

So, I really don't want to have to "select" my tree row. Are there other options?

Mike

[Michael Love]

Actually, I looked at the link provided and used a Custom validator.

Thanks, Mike