how to show updatepanel without refresh the page

i have create an gridview under UpdatePanel, when user click on link button on another grid, it will then show the UpdatePanel. How can i show the updatePanel without refresh the page?
protected void LinkButtonCommand(object sender, CommandEventArgs e)
{
if (eventButton.CommandName.Equals("Submit"))
{
UpdatePanel.Visible = true;
BindGrid();
}
}