How to use a listbox and dropdown list in a single ascx page and access it an aspx page

I want to use multiple controls like dropdown list, listbox, radiobutton list in a single ascx page instead of using multiple ascx pages and wanted to access it in an aspx page.

Solution

Lets say you have a user control MyControl.ascx with these controls:

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MyControl.ascx.cs" Inherits="WebApplication1.MyControl" %>
<asp:LinkButton ID="lbtn" runat="server">Link Button</asp:LinkButton>
<asp:RadioButton ID="rbtn" runat="server" Text="Radio Button" />
<asp:DropDownList ID="ddl" runat="server">
    <asp:ListItem Text="Dropdown"></asp:ListItem>
</asp:DropDownList>

Now MyControl.ascx.cs page code: Create public properties for each control and set them

public DropDownList dropdown { get; set; }

public RadioButton radioButton { get; set; }

public LinkButton linkbutton { get; set; }

protected void Page_Load(object sender, EventArgs e)
{
    SetCtrlProperties();
}

private void SetCtrlProperties(){
    dropdown = ddl;
    radioButton = rbtn;
    linkbutton = lbtn;
}

Now if you are placing this on a page named default.aspx and want to hide all control on a button clicked from .aspx page then .aspx page code:

<body>
    <form id="form1" runat="server">
    <div>
    </div>
    <uc1:MyControl ID="MyControl1" runat="server" />
    <asp:Button ID="Button1" runat="server" Text="Hide" onclick="Button1_Click" />
    </form>
</body>

and Default.aspx.cs page code :

protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            MyControl1.dropdown.Visible = false;
            MyControl1.radioButton.Visible = false;
            MyControl1.linkbutton.Visible = false;
        }