Populate Google Maps with Multiple Markers using Excel File Data in ASP.Net

Last Reply on Apr 09, 2014 01:25 PM By Azim

Posted on Apr 09, 2014 03:38 AM

How to get the location by which CSV files contains the Latitude and Longitude in it... How to get it using ajax request in the Javascript??

Posted on Apr 09, 2014 01:25 PM

Here i have used two links.

  <add key="FolderPath" value="Files/"/>
  <add name="Excel03ConString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR={1}'"/>
  <add name="Excel07ConString" connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 8.0;HDR={1}'"/>


<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <form id="form1" runat="server">
    <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
    <script type="text/javascript">
    var markers = [
    <asp:Repeater ID="rptMarkers" runat="server">
                "title": '<%# Eval("Name") %>',
                "lat": '<%# Eval("Latitude") %>',
                "lng": '<%# Eval("Longitude") %>',
                "description": '<%# Eval("Description") %>'
    <script type="text/javascript">

        window.onload = function () {
            var mapOptions = {
                center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
                zoom: 8,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            var infoWindow = new google.maps.InfoWindow();
            var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
            for (i = 0; i < markers.length; i++) {
                var data = markers[i]
                var myLatlng = new google.maps.LatLng(data.lat, data.lng);
                var marker = new google.maps.Marker({
                    position: myLatlng,
                    map: map,
                    title: data.title
                (function (marker, data) {
                    google.maps.event.addListener(marker, "click", function (e) {
                        infoWindow.open(map, marker);
                })(marker, data);
    <asp:FileUpload ID="FileUpload1" runat="server" />
    <asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="btnUpload_Click" />
    <div id="dvMap" style="width: 500px; height: 500px">


protected void btnUpload_Click(object sender, EventArgs e)

    if (FileUpload1.HasFile)
        string FileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
        string Extension = Path.GetExtension(FileUpload1.PostedFile.FileName);
        string FolderPath = ConfigurationManager.AppSettings["FolderPath"];
        string FilePath = Server.MapPath(FolderPath + FileName);
        Import_To_Grid(FilePath, Extension, "Yes");

private void Import_To_Grid(string FilePath, string Extension, string isHDR)

    string conStr = "";
    switch (Extension)

        case ".xls": //Excel 97-03
            conStr = ConfigurationManager.ConnectionStrings["Excel03ConString"]

        case ".xlsx": //Excel 07
            conStr = ConfigurationManager.ConnectionStrings["Excel07ConString"]

    conStr = String.Format(conStr, FilePath, isHDR);
    OleDbConnection connExcel = new OleDbConnection(conStr);
    OleDbCommand cmdExcel = new OleDbCommand();
    OleDbDataAdapter oda = new OleDbDataAdapter();
    DataTable dt = new DataTable();
    cmdExcel.Connection = connExcel;
    //Get the name of First Sheet
    DataTable dtExcelSchema;
    dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
    string SheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString();
    //Read Data from First Sheet
    cmdExcel.CommandText = "SELECT * From [" + SheetName + "]";
    oda.SelectCommand = cmdExcel;
    //Bind Data to rptMarkers
    rptMarkers.DataSource = dt;


using System.Data;
using System.Configuration;
using System.Data.SqlClient;
using System.IO;
using System.Data.OleDb;


This will be your Excel file. Store the table details(Locations) in the excel file which you will find in the above link.

Thank You.