To access control of a User Control from an aspx page

Whenever you want to access the controls of an usercontrol, create public properties for those controls in your usercontrols and you could easily access them in your .aspx page.

Here it goes how...
UserControl.

1 public partial class WebUserControl : System.Web.UI.UserControl
2 {
3 public string TextBoxValue {
4 get { return TextBox1.Text; }
5 set { TextBox1.Text = value; }
6 }
7 protected void Page_Load(object sender, EventArgs e) {
8
9 }
10 }

In your .aspx page you can access it either html or code
<%@ Register TagPrefix="DS" TagName="TB" Src="~/WebUserControl.ascx" %>




or

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
myTB1.TextBoxValue = "Sample Text";
}
}