ASP.NET ASP.NET - User Controls Creating User Control Instance Programmatically
Example
If you want to instantiate an instance of user control inside ASPX code behind page, you need to write user control declaration on Page_Load event as follows:
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(Object sender, EventArgs e)
{
Control control1 = LoadControl("UserControl.ascx");
Page.Controls.Add(control1);
}
}
Note that the user control ASCX file should be already created when executing LoadControl method.
Another way known to declare user controls programatically is using PlaceHolder:
public partial class Default : System.Web.UI.Page
{
public PlaceHolder Placeholder1;
protected void Page_Load(Object sender, EventArgs e)
{
Control control1 = LoadControl("UserControl.ascx");
Placeholder1.Controls.Add(control1);
}
}
Depending on your need, PlaceHolder places user controls on a container storing all server controls dynamically added into the page, where Page.Controls directly inserts user control inside the page which more preferred for rendering HTML literal controls.
