Setting the Auto Collapse Property

Autocollapse causes all expanded nodes to collapse if another node is expanded. This task-based help topic will walk you through setting the AutoCollapse property in Design View and in Source View.

In Design View

In the Design View, navigate to the C1TreeView Properties window.
Locate the AutoCollapse property and use the drop-down menu to set the property to "true".
Press F5 to run your program. Note that when one node is expanded, any other expanded nodes will automatically collapse.

In Source View

In the Source View, add the following markup to create the nodes for C1TreeView.

Markup	Copy Code
<Nodes> <cc1:C1TreeViewNode Text="Folder 1"> <Nodes> <cc1:C1TreeViewNode Text="Folder 1.1"> <Nodes> <cc1:C1TreeViewNode Text="Folder 1.1.1"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 1.1.2"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 1.1.3"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 1.1.4"> </cc1:C1TreeViewNode> </Nodes> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 1.2"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 1.3"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 1.4"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 1.5"> </cc1:C1TreeViewNode> </Nodes> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 2"> <Nodes> <cc1:C1TreeViewNode Text="Folder 2.1"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 2.2"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 2.3"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 2.4"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 2.5"> </cc1:C1TreeViewNode> </Nodes> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 3"> <Nodes> <cc1:C1TreeViewNode Text="Folder 3.1"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 3.2"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 3.3"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 3.4"> </cc1:C1TreeViewNode> <cc1:C1TreeViewNode Text="Folder 3.5"> </cc1:C1TreeViewNode> </Nodes> </cc1:C1TreeViewNode> </Nodes>

Markup

Copy Code

<Nodes>
            <cc1:C1TreeViewNode Text="Folder 1">
                <Nodes>
                    <cc1:C1TreeViewNode Text="Folder 1.1">
                        <Nodes>
                            <cc1:C1TreeViewNode Text="Folder 1.1.1">
                            </cc1:C1TreeViewNode>
                            <cc1:C1TreeViewNode Text="Folder 1.1.2">
                            </cc1:C1TreeViewNode>
                            <cc1:C1TreeViewNode Text="Folder 1.1.3">
                            </cc1:C1TreeViewNode>
                            <cc1:C1TreeViewNode Text="Folder 1.1.4">
                            </cc1:C1TreeViewNode>
                        </Nodes>
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 1.2">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 1.3">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 1.4">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 1.5">
                    </cc1:C1TreeViewNode>
                </Nodes>
            </cc1:C1TreeViewNode>
            <cc1:C1TreeViewNode Text="Folder 2">
                <Nodes>
                    <cc1:C1TreeViewNode Text="Folder 2.1">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 2.2">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 2.3">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 2.4">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 2.5">
                    </cc1:C1TreeViewNode>
                </Nodes>
            </cc1:C1TreeViewNode>
            <cc1:C1TreeViewNode Text="Folder 3">
                <Nodes>
                    <cc1:C1TreeViewNode Text="Folder 3.1">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 3.2">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 3.3">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 3.4">
                    </cc1:C1TreeViewNode>
                    <cc1:C1TreeViewNode Text="Folder 3.5">
                    </cc1:C1TreeViewNode>
                </Nodes>
            </cc1:C1TreeViewNode>
        </Nodes>

Add Autocollapse="true" to the <cc1:C1TreeView> tags as in the following sample:
```
<cc1:C1TreeView ID="C1TreeView1" runat="server" AutoCollapse="true">
```
Press F5 to run your program. Note that when one node is expanded, any other expanded node will automatically collapse.