WPF get Content of a treeviewitem

Question

I need to check what treeviewitem the user selected everytime it changes. I used the SelectedItemChanged method or whatever this is called. It works fine but now I need to do a switch case for every possible treeviewitem . But I can't do that since I have no idea how to get the name of it. I checked on internet but some people said to use treeview.SelectedItem but it returns System.Windows.Controls.TreeViewItem Header: Items.Count:0 . I was wondering if I could do that entirely in the .cs code file or if I had to use data binding and such.

Thanks for your help.

EDIT:

Here is how i setup the treeview and the treeviewitems. They are all like the second example.

<TreeView x:Name="treeview" Margin="10,10,0,4" HorizontalAlignment="Left" Width="192" Background="#FFA45353" SelectedItemChanged="treeview_SelectedItemChanged"">
        <TreeViewItem IsExpanded="False">
            <TreeViewItem.Header>
                <StackPanel Orientation="Horizontal">
                    <Image Source="./Resources/smallicons/icon.jpg"/>
                    <TextBlock Text=" Main" FontSize="14"/>
                </StackPanel>
            </TreeViewItem.Header>
            <!--==============================================================================================-->
            <TreeViewItem>
                <TreeViewItem.Header>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="First" Foreground="Black" />
                    </StackPanel>
                </TreeViewItem.Header>
            </TreeViewItem>
            <!--==============================================================================================-->

Answer 1

Are you looking for this?

TreeViewItem selectedNode = (TreeViewItem)treeView.SelectedItem;
string strSelectedNode = selectedNode.Header.ToString();

The above snippet assumes a few things though.

By the way, this code is part of

private void TreeViewItem_Selected(object sender, RoutedEventArgs e)
{
    TreeViewItem selectedNode = (TreeViewItem)treeView.SelectedItem;
    MessageBox.Show(selectedNode.Header.ToString());
}

Answer 2

Ok...As per your treeview and treeview Item setup, you have to code something like this..

private void treeview_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
    {    
            TreeViewItem selectedNode = (TreeViewItem)treeview.SelectedItem;
            var sp = selectedNode.Header as StackPanel;
            var tb = sp.Children[0] as TextBlock;
            var selecteditem = tb.Text;
            //MessageBox.Show(selecteditem);
            switch (selecteditem)
            {
                case "Main":
                    MessageBox.Show(selecteditem);
                    break;
                case "First":
                    MessageBox.Show(selecteditem);
                    break;
                default:
                    MessageBox.Show("no matching item found");
                    break;
            }
        }

Here, I am digging in the selected tree view item to get the Text of selected tree view item. You may have to tweak the code a bit to get it fully operational. Let me know if you need any help with it.