<GroupBox Header="运输信息" Panel.ZIndex="5">
                                
                                <StackPanel Orientation="Horizontal">
                                    <Label Content="代单号："></Label>
                                    <TextBox Name="txtOrderid" Width="130" Height="20"></TextBox>
                                    <Label Content="起点：" Margin="30,0,0,0"></Label>
                                    <Canvas Width="130" Panel.ZIndex="7">
                                        
                                        <TextBox Name="txtSstie" Width="130" Height="20" PreviewKeyUp="txtSstie_PreviewKeyUp"></TextBox>
                                        <ListBox Name="lstSsite" Width="130" Margin="0,20,0,0" Height="70" Visibility="Collapsed" >
                                            <ListBoxItem Content="sdfafdas" />
                                            <ListBoxItem Content="asdfasdfasdfsa" />
                                            <ListBoxItem Content="asdfadfasd" />
                                        </ListBox>
                                    </Canvas>
                                    <Label Content="终点："></Label>
                                    <Canvas Width="130">
                                        <TextBox Name="txtEstie" Width="130" Height="20"></TextBox>
                                        <ListBox Name="lstEsite" Width="130" Margin="0,20,0,0" Visibility="Collapsed"></ListBox>
                                    </Canvas>
                                    <Label Content="运输方式：" Margin="30,0,0,0"></Label>
                                    <ComboBox Name="cmbTranWay" Width="90"></ComboBox>
                                </StackPanel>
                            </GroupBox>

        private void txtSstie_PreviewKeyUp(object sender, KeyEventArgs e)
        {
            lstSsite.Visibility = Visibility.Visible;
        }