[返回上一页，并且刷新]

[返回上一页，并且刷新]
----------------------------
if(!Page.IsPostBack)
   {
    ViewState["BackUrl"]=Request.UrlReferrer.ToString();
   }

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private void Button1_Click(object sender, System.EventArgs e)
  {
   
   Response.Redirect(ViewState["BackUrl"].ToString());
  }

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