Twitter just recently retired their old API 1.0. The new API requires oAuth. Following code will help you jumpstart to write code in C# to get your tweets.
This is using dot net framework 4.0
I am also using NewtonSoft’s excellent JSON library. You can get it here. Use the dot net 4.0 library and add as a reference to your C# Web project.
You first have to create a twitter app here. Use the oAuth Tool tab to get the 4 tokens/codes that you will be replacing in the code below.
Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div id="myDiv" runat="server">
</div>s
</form>
</body>
</html>
Default.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Security.Cryptography;
using System.Net;
using System.IO;
using Newtonsoft.Json.Linq;
public partial class _Default : System.Web.UI.Page
{
public string query = "umerpasha";
// public string url = "https://api.twitter.com/1.1/users/search.json" ;
public string url = "https://api.twitter.com/1.1/statuses/user_timeline.json" ;
protected void Page_Load(object sender, EventArgs e)
{
findUserTwitter(url, query);
}
public void findUserTwitter(string resource_url, string q)
{
// oauth application keys
var oauth_token = "xxx"; //"insert here...";
var oauth_token_secret = "xxx"; //"insert here...";
var oauth_consumer_key = "xxx";// = "insert here...";
var oauth_consumer_secret = "xxx";// = "insert here...";
// oauth implementation details
var oauth_version = "1.0";
var oauth_signature_method = "HMAC-SHA1";
// unique request details
var oauth_nonce = Convert.ToBase64String(new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
var timeSpan = DateTime.UtcNow
- new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();
// create oauth signature
var baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}&q={6}";
var baseString = string.Format(baseFormat,
oauth_consumer_key,
oauth_nonce,
oauth_signature_method,
oauth_timestamp,
oauth_token,
oauth_version,
Uri.EscapeDataString(q)
);
baseString = string.Concat("GET&", Uri.EscapeDataString(resource_url), "&", Uri.EscapeDataString(baseString));
var compositeKey = string.Concat(Uri.EscapeDataString(oauth_consumer_secret),
"&", Uri.EscapeDataString(oauth_token_secret));
string oauth_signature;
using (HMACSHA1 hasher = new HMACSHA1(ASCIIEncoding.ASCII.GetBytes(compositeKey)))
{
oauth_signature = Convert.ToBase64String(
hasher.ComputeHash(ASCIIEncoding.ASCII.GetBytes(baseString)));
}
// create the request header
var headerFormat = "OAuth oauth_nonce=\"{0}\", oauth_signature_method=\"{1}\", " +
"oauth_timestamp=\"{2}\", oauth_consumer_key=\"{3}\", " +
"oauth_token=\"{4}\", oauth_signature=\"{5}\", " +
"oauth_version=\"{6}\"";
var authHeader = string.Format(headerFormat,
Uri.EscapeDataString(oauth_nonce),
Uri.EscapeDataString(oauth_signature_method),
Uri.EscapeDataString(oauth_timestamp),
Uri.EscapeDataString(oauth_consumer_key),
Uri.EscapeDataString(oauth_token),
Uri.EscapeDataString(oauth_signature),
Uri.EscapeDataString(oauth_version)
);
ServicePointManager.Expect100Continue = false;
// make the request
var postBody = "q=" + Uri.EscapeDataString(q);//
resource_url += "?" + postBody ;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(resource_url);
request.Headers.Add("Authorization", authHeader);
request.Method = "GET";
request.ContentType = "application/x-www-form-urlencoded";
var response = (HttpWebResponse)request.GetResponse();
var reader = new StreamReader(response.GetResponseStream());
var objText = reader.ReadToEnd();
myDiv.InnerHtml = objText;/**/
string html = "";
try
{
JArray jsonDat = JArray.Parse(objText);
for (int x = 0; x < jsonDat.Count(); x++)
{
//html += jsonDat[x]["id"].ToString() + "<br/>";
html += jsonDat[x]["text"].ToString() + "<br/>";
// html += jsonDat[x]["name"].ToString() + "<br/>";
html += jsonDat[x]["created_at"].ToString() + "<br/>";
}
myDiv.InnerHtml = html;
}
catch (Exception twit_error)
{
myDiv.InnerHtml = html + twit_error.ToString();
}
}
}
Umer Pasha Blogs 