System.Web.UI.Page.SetFocus C# (CSharp) Метод

	public void SetFocus (string clientID)
	{
		if (String.IsNullOrEmpty (clientID))
			throw new ArgumentNullException ("control");

		if (IsPrerendered)
			throw new InvalidOperationException ("SetFocus can only be called before and during PreRender.");

		if(Form==null)
			throw new InvalidOperationException ("A form tag with runat=server must exist on the Page to use SetFocus() or the Focus property.");

		_focusedControlID = clientID;
	}

 void IPage.SetFocus(Control control)
 {
     _page.SetFocus(control);
 }