if (!IsPostBack)
{
ViewState[Constants.ViewState.ReferUrl] = Request.UrlReferrer.ToString();
}
protected void btnSignIn_Click(object sender, ImageClickEventArgs e)
{
if (this.SignIn())
{
if (ViewState[Constants.ViewState.ReferUrl] != null)
{
Response.Redirect(ViewState[Constants.ViewState.ReferUrl].ToString(), false);
}
}
}