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 />")); } } }