Simple Google News API

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Introduction

In this tip, I am going to discuss about Google news API.

Background

I have used HttpWebRequest and HttpWebResponse for retrieving news from Google API URL. I have written all code for that....

I have one textbox for insert search parameters and one button for search data using Google API.

When we click on Get News button, it calls JavaScript GetNews() function.

From JavaScript function, Ajax post method calls web method from code behind.

Google News content has been retrieved using HttpWebRequest and HttpWebRequest, this WebMethod returns data into array format from code behind.

Now Div having name "DivNews" has been appended for showing news content using jQuery.

For further details, please take a look at the code.

Using the Code

1) News.aspx

JavaScript Code

<script type="text/javascript" src="Scripts/jquery-2.1.0.min.js"></script>
<script>

    //For Enter Key Press Event
    function runScript(e) {
        if (e.keyCode == 13) {

            //Call GetNews Function
            GetNews();

            return false;
        }
    }

    //Function for GetNews Using Ajax Post Method
    function GetNews() {

        //Set FadeIn for Progressive Div
        $("#ProgressiveDiv").fadeIn();

        //Create Ajax Post Method
        $.ajax({
            type: "POST", // Ajax Method
            url: "News.aspx/GetNewsContent",  //Page URL / Method name
            data: "{'NewsParameters':'" +
            document.getElementById("txtSubject").value + "'}", // Pass Parameters
            contentType: "application/json;charset=utf-8",
            dataType: "json",
            success: function (data) { // Function call on success

                $("#DivNews").empty(); // Set Div Empty

                //Set For loop for binding Div Row wise
                for (var i = 0; i < data.d.length; i++) {

                    //Design Div Dynamically using append
                    $("#DivNews").append("<tr><td>
                    <B style='color:Red'>" + data.d[i].title +
                    "- By: Nirav Prabtani</B> </td></tr><tr><td>" +
                    data.d[i].Description + "</td></tr>");
                }

                //set fadeOut for ProgressiveDiv
                $("#ProgressiveDiv").fadeOut(500);
            },

            error: function (result) { // Function call on failure or error
                alert(result.d);
            }
        });
    }
</script>

CSS Code

<style type="text/css">
     .classname
     {
         -moz-box-shadow: inset 0px 1px 0px 0px #ffffff;
         -webkit-box-shadow: inset 0px 1px 0px 0px #ffffff;
         box-shadow: inset 0px 1px 0px 0px #ffffff;
         background: -webkit-gradient( linear, left top,
         left bottom, color-stop(0.05, #ededed), color-stop(1, #dfdfdf) );
         background: -moz-linear-gradient( center top, #ededed 5%, #dfdfdf 100% );
         filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ededed', endColorstr='#dfdfdf');
         background-color: #ededed;
         -webkit-border-top-left-radius: 6px;
         -moz-border-radius-topleft: 6px;
         border-top-left-radius: 6px;
         -webkit-border-top-right-radius: 6px;
         -moz-border-radius-topright: 6px;
         border-top-right-radius: 6px;
         -webkit-border-bottom-right-radius: 6px;
         -moz-border-radius-bottomright: 6px;
         border-bottom-right-radius: 6px;
         -webkit-border-bottom-left-radius: 6px;
         -moz-border-radius-bottomleft: 6px;
         border-bottom-left-radius: 6px;
         text-indent: 0;
         border: 1px solid #dcdcdc;
         display: inline-block;
         color: #777777;
         font-family: arial;
         font-size: 15px;
         font-weight: bold;
         font-style: normal;
         height: 25px;
         line-height: 50px;
         width: 100px;
         text-decoration: none;
         text-align: center;
         text-shadow: 1px 1px 0px #ffffff;
     }
     .classname:hover
     {
         background: -webkit-gradient( linear, left top,
         left bottom, color-stop(0.05, #dfdfdf), color-stop(1, #ededed) );
         background: -moz-linear-gradient( center top, #dfdfdf 5%, #ededed 100% );
         filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#dfdfdf', endColorstr='#ededed');
         background-color: #dfdfdf;
     }
     .classname:active
     {
         position: relative;
         top: 1px;
     }

     .textbox
     {
         background: #FFF url(http://html-generator.weebly.com/files/theme/input-text-9.png) no-repeat 4px 4px;
         border: 1px solid #999;
         outline: 0;
         padding-left: 25px;
         height: 25px;
         width: 275px;
     }
     .style1
     {
         height: 61px;
     }
     #ProgressiveDiv
     {
         width: 100%;
         height: 100%;
         display: none;
         opacity: 0.4;
         position: fixed;
         top: 0px;
         left: 0px;
         vertical-align: middle;
     }
 </style>

HTML Code

  <body>
    <form id="form1" runat="server">
    <div>
        <table>
            <tr>
                <td align="center" class="style1">
                    <h3>
                        Welcome to My news Portal</h3>
                </td>
            </tr>
            <tr>
                <td>
                    <asp:TextBox runat="server" ID="txtSubject" 
                    CssClass="textbox" onkeypress="return runScript(event)" />
                </td>
            </tr>
            <tr>
                <td align="right">
                    <h6 style="height: 35px">
                        By: Nirav Prabtani</h6>
                </td>
            </tr>
        </table>
        <div id="DivNews">
        </div>

    </div>
    <%--This Div is For Binding News--%>
    <div id="ProgressiveDiv" style="padding-left: 500px">
        <img src="Image/loading.gif" />
    </div>
    </form>
</body> 

2) News.aspx.cs

All news content from Google API has been retrieved using webMethod from code behind.

C# Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
using System.Net;
using System.IO;
using System.Text;
using System.Data;

namespace GoogleNews_API
{
    public partial class News : System.Web.UI.Page
    {
        //Page Load Method
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        //WenMethod GetNewsContent for Retrieving News from Google API
        [WebMethod]
        public static ItemNews[] GetNewsContent(string NewsParameters)
        {

            List<ItemNews> Details = new List<ItemNews>();

            // httpWebRequest with API URL
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create
            ("http://news.google.com/news?q=" + NewsParameters + "&output=rss");

            //Method GET
            request.Method = "GET";

            //HttpWebResponse for result
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();


            //Mapping of status code
            if (response.StatusCode == HttpStatusCode.OK)
            {
                Stream receiveStream = response.GetResponseStream();
                StreamReader readStream = null;

                if (response.CharacterSet == "")
                    readStream = new StreamReader(receiveStream);
                else
                    readStream = new StreamReader(receiveStream, Encoding.GetEncoding(response.CharacterSet));

                //Get news data in json string

                string data = readStream.ReadToEnd();

                //Declare DataSet for putting data in it.
                DataSet ds = new DataSet();
                StringReader reader = new StringReader(data);
                ds.ReadXml(reader);
                DataTable dtGetNews = new DataTable();

                if (ds.Tables.Count > 3)
                {
                    dtGetNews = ds.Tables["item"];

                    foreach (DataRow dtRow in dtGetNews.Rows)
                    {
                        ItemNews DataObj = new ItemNews();
                        DataObj.title = dtRow["title"].ToString();
                        DataObj.link = dtRow["link"].ToString();
                        DataObj.item_id = dtRow["item_id"].ToString();
                        DataObj.PubDate = dtRow["pubDate"].ToString();
                        DataObj.Description = dtRow["description"].ToString();
                        Details.Add(DataObj);
                    }
                }
            }

            //Return News array 
            return Details.ToArray();
        }

        //Define Class to return news data
        public class ItemNews
        {
            public string title { get; set; }
            public string link { get; set; }
            public string item_id { get; set; }
            public string PubDate { get; set; }
            public string Description { get; set; }
        }
    }
} 

Final Output

History

• 26^th Mar 2014: Initial post