防止页面刷新时出现重复记录插入

我搜索了很多..但未能实现。这里是我的代码，我如何防止重复插入页面刷新,,（我如何使用viewstate，或任何其他方法.... resposnse.redirect不是在这种情况下的解决方案）。防止页面刷新时出现重复记录插入

protected void btn_save_click(object sender, EventArgs e) 
    { 
      System.Data.DataTable dt_plotid = new System.Data.DataTable(); 
      dt_plotid = FghBAL.Admitting.GetMax_ByPlotID(txt_plot.Text); 
      string plotid = dt_plotid.Rows[0]["ID"].ToString(); 
      if (FghBAL.Alotee.InserAllotee(txt_alotee_name.Text.ToUpper(), ddl_alotee_sw.SelectedValue.ToUpper(), txt_alotee_fname.Text.ToUpper(), alotee_cnic, txt_alotee_phone.Text, txt_alotee_cellno.Text, txt_alotee_address.Text, txt_alotee_email.Text, plotid)) 
      { 
       lbl_error_3.Visible = true; 
       lbl_error_3.Text = "Add Successfully"; 
       txt_alotee_name.Enabled = false; 
       ddl_alotee_sw.Enabled = false; 
       txt_alotee_fname.Enabled = false; 
       txt_alotee_cnic_1.Enabled = false; 
       txt_alotee_cnic_2.Enabled = false; 
       txt_alotee_cnic_3.Enabled = false; 
       txt_alotee_phone.Enabled = false; 
       txt_alotee_cellno.Enabled = false; 
       txt_alotee_address.Enabled = false; 
       txt_alotee_email.Enabled = false; 
       System.Data.DataTable dt_alotee_data = new System.Data.DataTable(); 
       dt_alotee_data = FghBAL.Alotee.GetDatabyPlot_Id(plotid); 
       grid_alotee.DataSource = dt_alotee_data; 
       grid_alotee.DataBind(); 
       grid_alotee.Visible = true; 
       btn_save_alotee.Visible = true; 

       btn_link_another_alotee.Visible = true; 
       lbl_grd_alotee.Visible = true; 
       tabcontent3.Style.Add("height", "80%"); 
       //ViewState["dt_alotee_view"] = dt_alotee_data; 
       btn_save_alotee.Enabled = false; 
       // Response.Redirect(Request.Url.AbsoluteUri); 
      } 
      else 
      { 
       lbl_error_3.Text = "Unable to add Allottee Information"; 
      } 
     }

来源

2014-10-26 Niha Mialk

* resposnse.redirect在这种情况下不是解决方案*为什么？ – 2014-10-26 14:38:16

，因为它移动到第一个标签..但我希望它留在当前标签..即时通讯在同一页上使用多个标签（标签由单选按钮控制） – 2014-10-26 14:40:35

在InserAllotee方法中添加一个重复的检查逻辑。 – 2014-10-26 14:42:18