Panel

@inherits ControlComponent

<asp.Panel @ref="this.panel"
                                            BackColor="gainsboro"
                                            Height="200px"
                                            Width="300px"
                                            ScrollBars="ScrollBars.Auto">
    Panel: Here is some static content...
                                            <br />
</asp.Panel>

<br />

Generate Labels:
<asp.DropDownList @ref="this.dropDown1">
                                            <asp.ListItem Value="0">0</asp.ListItem>
                                            <asp.ListItem Value="1">1</asp.ListItem>
                                            <asp.ListItem Value="2">2</asp.ListItem>
                                            <asp.ListItem Value="3">3</asp.ListItem>
                                            <asp.ListItem Value="4">4</asp.ListItem>
</asp.DropDownList>

<br />

Generate TextBoxes:
<asp.DropDownList @ref="this.dropDown2">
                                            <asp.ListItem Value="0">0</asp.ListItem>
                                            <asp.ListItem Value="1">1</asp.ListItem>
                                            <asp.ListItem Value="2">2</asp.ListItem>
                                            <asp.ListItem Value="3">3</asp.ListItem>
                                            <asp.ListItem Value="4">4</asp.ListItem>
</asp.DropDownList>

<br />
<asp.CheckBox @ref="this.checkBox" Text="Hide Panel" />

<br />
<asp.Button Text="Refresh Panel"
                                            OnClick="this.ButtonClick" />

@code {
                                            private Panel panel;
                                            private DropDownList dropDown1;
                                            private DropDownList dropDown2;
                                            private CheckBox checkBox;

                                            protected void ButtonClick(object sender, EventArgs e)
    {
                                            // Show or hide the Panel contents.
                                            if (checkBox.Checked)
        {
            panel.Visible = false;
        }
                                            else
        {
            panel.Visible = true;
        }
                                            // Remove the last time generated controls.
                                            foreach (Control control in panel.Controls.Cast<Control>()
            .Where(a => a is Label || a is TextBox || a is LiteralControl).ToArray())
        {
            panel.Controls.Remove(control);
        }
                                            // Generate the Label controls.
                                            int numlabels = Int32.Parse(dropDown1.SelectedItem.Value);
                                            for (int i = 1; i <= numlabels; i++)
        {
            Label label = new Label();
            label.Text = "Label" + (i).ToString();
            panel.Controls.Add(label);
            panel.Controls.Add(new LiteralControl("<br />"));
        }
                                            // Generate the Textbox controls.
                                            int numtexts = Int32.Parse(dropDown2.SelectedItem.Value);
                                            for (int i = 1; i <= numtexts; i++)
        {
            TextBox textBox = new TextBox();
            textBox.Text = "TextBox" + (i).ToString();
            panel.Controls.Add(textBox);
            panel.Controls.Add(new LiteralControl("<br />"));
        }
    }
}