How to find distance between two location through Google API's using Asp.Net C# ~ Code Kulshresth

How to find distance between two location through Google API's using Asp.Net C#

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Google Distance Matrix</title>
<style type="text/css">
.style1
{
height: 30px;
}
</style>

<script src="https://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"
type="text/javascript"></script>

<script type="text/javascript">
function OrginAutoComplete() {
try {
var input = document.getElementById('TextBox1');
var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.setTypes('changetype-geocode');
}
catch (err) {
// alert(err);
}
}

function DestAutoComplete() {
try {
var input = document.getElementById('TextBox2');
var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.setTypes('changetype-geocode');
}
catch (err) {
// alert(err);
}
}

google.maps.event.addDomListener(window, 'load', OrginAutoComplete);
google.maps.event.addDomListener(window, 'load', DestAutoComplete);
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<table cellpadding="0" cellspacing="0" align="center" width="700">
<tr>
<td colspan="2" height="40">
<b>Distance calculation using Google API</b>
</td>
</tr>
<tr>
<td class="style1">
Enter Orgin Place
</td>
<td class="style1">
<asp:TextBox ID="TextBox1" runat="server" Width="300"></asp:TextBox>
</td>
</tr>
<tr>
<td height="30">
Enter Destination Place
</td>
<td>
<asp:TextBox ID="TextBox2" runat="server" Width="300"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="2" align="center" height="60">
<asp:Button ID="btnSearch" runat="server" Text="Calculate Distance" OnClick="btnSearch_Click" />
</td>
</tr>
<tr>
<td colspan="2" align="center" height="40">
<br />
<br />
<asp:Label ID="lblResult" runat="server" Text=""></asp:Label>
</td>
</tr>
</table>
<br />
</div>
</form>
</body>
</html>

.......................................code behind..................................................

using System.Net;

using System.Xml;

using System.Data;

using System.IO;

using System.Xml.XPath;

using System;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

lblResult.Text = "";

}

protected void btnSearch_Click(object sender, EventArgs e)

{

//Declare variable to store XML result

string xmlResult = null;

//Pass request to google api with orgin and destination details

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://maps.googleapis.com/maps/api/distancematrix/xml?origins=" + TextBox1.Text + "&destinations=" + TextBox2.Text + "&mode=Car&language=us-en&sensor=false");

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

//Get response as stream from httpwebresponse

StreamReader resStream = new StreamReader(response.GetResponseStream());

//Create instance for xml document

XmlDocument doc = new XmlDocument();

//Load response stream in to xml result

xmlResult = resStream.ReadToEnd();

//Load xmlResult variable value into xml documnet

doc.LoadXml(xmlResult);

string output = "";

try

{

//Get specified element value using select single node method and verify it return OK (success ) or failed

if (doc.DocumentElement.SelectSingleNode("/DistanceMatrixResponse/row/element/status").InnerText.ToString().ToUpper() != "OK")

{

lblResult.Text = "Invalid City Name please try again";

return;

}

//Get DistanceMatrixResponse element and its values

XmlNodeList xnList = doc.SelectNodes("/DistanceMatrixResponse");

foreach (XmlNode xn in xnList)

{

if (xn["status"].InnerText.ToString() == "OK")

{

//Form a table and bind it orgin, destination place and return distance value, approximate duration

output = "<table align='center' width='600' cellpadding='0' cellspacing='0'>";

output += "<tr><td height='60' colspan='2' align='center'><b>Travel Details</b></td>";

output += "<tr><td height='40' width='30%' align='left'>Orgin Place</td><td align='left'>" + xn["origin_address"].InnerText.ToString() + "</td></tr>";

output += "<tr><td height='40' align='left'>Destination Place</td><td align='left'>" + xn["destination_address"].InnerText.ToString() + "</td></tr>";

output += "<tr><td height='40' align='left'>Travel Duration (apprx.)</td><td align='left'>" + doc.DocumentElement.SelectSingleNode("/DistanceMatrixResponse/row/element/duration/text").InnerText + "</td></tr>";

output += "<tr><td height='40' align='left'>Distance</td><td align='left'>" + doc.DocumentElement.SelectSingleNode("/DistanceMatrixResponse/row/element/distance/text").InnerText + "</td></tr>";

output += "</table>";

//finally bind it in the result label control

lblResult.Text = output;

}

catch (Exception ex)

{

lblResult.Text = "Error during processing";

return;

}

Dotnet Tracking Team

Hi all friends, I think working with DotNet technologies is quite good. Some of them are sharing with you, which will help a lot to get a good job and to make the interview worthy. Best wishes.

Wednesday, 4 June 2014