Button click event call twice during auto page load.

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C#

ASP.NET

Javascript

HTML

Unexpected behavior such as a button click event being called twice in an ASP.NET application, particularly when it's observed only in IIS and not during code debugging,

What I have tried:

I am using loading bar on any button click with the help of below javascript code.

<script type="text/javascript" src="scripts/loadbar/jquery.min.js"></script>
   <script type="text/javascript">
        var IsExportClick = false;
       function HideProgressBar() {
           debugger;
           IsExportClick = true;
       }
       function ShowProgress() {
           if (!IsExportClick) {
           setTimeout(function () {
               var modal = $('<div />');
               modal.addClass("modal");
               $('body').append(modal);
               var loading = $(".loading");
               loading.show();
               var top = Math.max($(window).height() / 2 - loading[0].offsetHeight / 2, 0);
               var left = Math.max($(window).width() / 2 - loading[0].offsetWidth / 2, 0);
               loading.css({ top: top, left: left});
           }, 200);
           }
       }
       $('form').live("submit", function () {
           ShowProgress();
       });
   </script>

this are my frontend html code of button

<tr>
    <td colspan="5" align="center">
        <asp:Button runat="server" ID="btnSave" Text="Save" CssClass="btn btn-primary" OnClientClick="return validate();" Width="150px" Visible="false" OnClick="btnSave_Click" />   
        <asp:Button runat="server" ID="btnTransaction" Text="Process" CssClass="btn btn-primary" OnClientClick="return validate();" Width="150px" Visible="false" OnClick="btnTransaction_Click" />   
        <asp:Button runat="server" ID="btnProcessOffline" Text="Process Offline" CssClass="btn btn-primary" OnClientClick="return validate();" Width="150px" Visible="false" OnClick="btnProcessOffline_Click" />
        <asp:HiddenField runat="server" ID="btnPayment_ClickData" /></td> </tr>

this are my button click event which call twice after few transaction happened.

  1  protected void btnTransaction_Click(object sender, EventArgs e)
  2  {
  3      //System.Threading.Thread.Sleep(5000);
  4      lblRecords.Text = string.Empty;
  5      DGO_OnlineApps = (OnlineAppsHandler)Session["Session1"];
  6      DataTable dtExistData = new DataTable();
  7  
  8      dtExistData = (DataTable)ViewState["ViewState1"];
  9      int chkCnt = 0;
 10      int processRecordCnt = 0;
 11      int failedRecordCnt = 0;
 12      Random rnd = new Random();
 13      int batchRandomNo = rnd.Next(100, 999);
 14      batchRandomNo = batchRandomNo + Convert.ToInt32(DateTime.Now.ToString("ddMMyyyy"));
 15      string batchno = GenerateBatchNo();
 16      foreach (DataGridItem item in dgCCTransaction.Items)
 17      {
 18          CheckBox chkSelect = (CheckBox)item.FindControl("chkSelect");
 19          if (chkSelect != null)
 20          {
 21              if (chkSelect.Checked && dtExistData.AsEnumerable().Where(x => x.Field<Int64>("ChkNo").ToString() == item.Cells[13].Text && x.Field<string>("Status") != "Done").Count() > 0)
 22              {
 23                  chkCnt++;
 24                  DataTable data = new DataTable(); 
 25                  data = Method1(Convert.ToInt32(item.Cells[5].Text), item.Cells[6].Text,"01" + " " + item.Cells[7].Text, item.Cells[8].Text);
 26                  DataTable dtGetDetails = new DataTable();
 27                  dtGetDetails = GetDetails(Convert.ToInt32(item.Cells[5].Text));
 28                  if (data != null && data.Rows.Count > 0)
 29                  {
 30                      if (data != null && !string.IsNullOrEmpty(data.Rows[0]["ResponseCode"].ToString()) && !string.IsNullOrEmpty(data.Rows[0]["ApprovalCode"].ToString()) && !data.Rows[0]["ResponseCode"].ToString().Contains("FAILED"))
 31                      {
 32                          string recid = InsertMemCCTrans("Done",Convert.ToInt32(item.Cells[5].Text), item.Cells[1].Text, "01" + " " + item.Cells[7].Text, data,item.Cells[12].Text, item.Cells[8].Text,batchRandomNo, batchno);
 33                          SendEmail("CCAuthSuccess", item.Cells[5].Text, item.Cells[7].Text, item.Cells[8].Text, "");
 34                          foreach (DataRow row in dtExistData.Rows)
 35                          {
 36                              if (row["ChkNo"].ToString() == item.Cells[13].Text)
 37                              {
 38                                  row["TranStatus"] = "Done";
 39                                  row["RECID"] = recid;
 40                                  processRecordCnt++;
 41                              }
 42                             
 43                          }
 44                      }
 45                      else
 46                      {
 47                          string recid = InsertMemCCTrans("Transaction Failed", Convert.ToInt32(item.Cells[5].Text), item.Cells[1].Text, "01" + " " + item.Cells[7].Text, data, item.Cells[12].Text, item.Cells[8].Text, batchRandomNo, null);
 48                          SendEmail("CCAuthUnSuccess", item.Cells[5].Text, item.Cells[7].Text, item.Cells[8].Text, dtGetDetails.Rows[0]["MP"].ToString());
 49                          foreach (DataRow row in dtExistData.Rows)
 50                          {
 51                              if (row["ChkNo"].ToString() == item.Cells[13].Text)
 52                              {
 53                                  row["TranStatus"] = "Transaction Failed";
 54                                  row["RECID"] = recid;
 55                                  failedRecordCnt++;
 56                              }
 57                              
 58                          }
 59                      }
 60                  }
 61                  else
 62                  {
 63                      string recid = InsertMemCCTrans("Transaction Failed", Convert.ToInt32(item.Cells[5].Text), item.Cells[1].Text, "01" + " " + item.Cells[7].Text, data, item.Cells[12].Text, item.Cells[8].Text, batchRandomNo, null);
 64                      SendEmail("CCAuthUnSuccess", item.Cells[5].Text, item.Cells[7].Text, item.Cells[8].Text, dtGetDetails.Rows[0]["MP"].ToString());
 65                      foreach (DataRow row in dtExistData.Rows)
 66                      {
 67                          if (row["ChkNo"].ToString() == item.Cells[13].Text)
 68                          {
 69                              row["TranStatus"] = "Transaction Failed";
 70                              row["RECID"] = recid;
 71                              failedRecordCnt++;
 72                          }
 73  
 74                      }
 75                  }
 76              }
 77          }
 78      }
 79  
 80      if (dtExistData != null)
 81      {
 82          if (dtExistData.Rows.Count > 0)
 83          {
 84              dgCCTransaction.DataSource = dtExistData;
 85              dgCCTransaction.DataBind();
 86              lblRecords.Text = chkCnt + " out of " + dtExistData.Rows.Count + " processed." +
 87                             "<br />Total Successful Transaction - " + processRecordCnt + "/" + chkCnt +
 88                             "<br />Total Failed Transaction - " + failedRecordCnt + "/" + chkCnt;
 89                             //"<br />Total Successful Sap Receipts - " + SapSuccess + "/" + PaymentSuccess.ToString() +
 90                             //"<br />Total Failed Sap Receipts - " + SapFailure + "/" + PaymentSuccess.ToString() +
 91                             //"<br />Total Successful Confirmation Emails - " + EmailSuccess.ToString() + "/" + TotalEmailRecords.ToString() +
 92                             //"<br />Total Failed Confirmation Emails - " + EmailFailure.ToString() + "/" + TotalEmailRecords.ToString();
 93          }
 94      }
 95      else
 96      {
 97          LoadPaymentData();
 98      }
 99  }