How to keep Current View selected in MultiView after Redirect in ASP.Net

For that keep your Selected View in ViewState or Session and On page Load set the Selected View based on Session value.

ViewState["ViewId"] = this.MultiView1.ActiveViewIndex;

and on page load set the active View

if (ViewState["ViewId"] != null)
{
     this.MultiView1.ActiveViewIndex = Convert.ToInt32(ViewState["ViewId"]);
}