防止頁面刷新時出現重複記錄插入

我搜索了很多..但未能實現。這裏是我的代碼，我如何防止重複插入頁面刷新,,（我如何使用viewstate，或任何其他方法.... resposnse.redirect不是在這種情況下的解決方案）。防止頁面刷新時出現重複記錄插入

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"; 
      } 
     }

來源

2014-10-26 Niha Mialk

* resposnse.redirect在這種情況下不是解決方案*爲什麼？ – 2014-10-26 14:38:16

，因爲它移動到第一個標籤..但我希望它留在當前標籤..即時通訊在同一頁上使用多個標籤（標籤由單選按鈕控制） – 2014-10-26 14:40:35

在InserAllotee方法中添加一個重複的檢查邏輯。 – 2014-10-26 14:42:18