In this article I will explain with an example, how to login with Twitter account in ASP.Net and also fetch the Twitter User Account and Profile details like Profile image, Screen Name, Email Address, Twitter Id, Name, Description, Tweets Count, Friends Count, Followers Count, etc. using the Free ASPSnippets Twitter API and Twitter OAUTH API.
Note:You can download the latest ASPSnippets.TwitterAPI.dll clicking the download link below.
          Download DLL file
 
 

Create Twitter Application and get API Key and API Secret
You will need to create an application on Twitter Apps and get an API Key and API Secret.
 
 
 
HTML Markup
The HTML Markup consist of a Login Button and an HTML Table with the fields to populate the Twitter User Account and Profile details such as Screen Name, Email Address, Twitter Id, etc. of the Logged in User as well as some other User whose Twitter Id or Handle is being passed.
<asp:Button ID="btnLogin" runat="server" Text="Login with Twitter" OnClick="btnLogin_Click" />
<hr />
<table runat="server" id="tblTwitter" visible="false">
    <tr>
        <td colspan="2"><u>Logged in Twitter User's Profile</u></td>
    </tr>
    <tr>
        <td style="width: 100px">Profile Image</td>
        <td><asp:Image ID="imgProfile" runat="server" /></td>
    </tr>
    <tr>
        <td>Name</td>
        <td><asp:Label ID="lblName" runat="server" /></td>
    </tr>
    <tr>
        <td>Twitter Id</td>
        <td><asp:Label ID="lblTwitterId" runat="server" /></td>
    </tr>
    <tr>
        <td>Screen Name</td>
        <td><asp:Label ID="lblScreenName" runat="server" /></td>
    </tr>
    <tr>
        <td>Description</td>
        <td><asp:Label ID="lblDescription" runat="server" /></td>
    </tr>
    <tr>
        <td>Tweets</td>
        <td><asp:Label ID="lblTweets" runat="server" /></td>
    </tr>
    <tr>
        <td>Followers</td>
        <td><asp:Label ID="lblFollowers" runat="server" /></td>
    </tr>
    <tr>
        <td>Friends</td>
        <td><asp:Label ID="lblFriends" runat="server" /></td>
    </tr>
    <tr>
        <td>Favorites</td>
        <td><asp:Label ID="lblFavorites" runat="server" /></td>
    </tr>
    <tr>
        <td>Location</td>
        <td><asp:Label ID="lblLocation" runat="server" /></td>
    </tr>
    <tr>
        <td>Email</td>
        <td><asp:Label ID="lblEmail" runat="server" /></td>
    </tr>
</table>
<hr />
<table runat="server" id="tblOtherTwitter" visible="false">
    <tr>
        <td colspan="2"><u>Other Twitter User's Profile</u></td>
    </tr>
    <tr>
        <td style="width: 100px">Profile Image</td>
        <td><asp:Image ID="imgOtherProfile" runat="server" /></td>
    </tr>
    <tr>
        <td>Name</td>
        <td><asp:Label ID="lblOtherName" runat="server" /></td>
    </tr>
    <tr>
        <td>Twitter Id</td>
        <td><asp:Label ID="lblOtherTwitterId" runat="server" /></td>
    </tr>
    <tr>
        <td>Screen Name</td>
        <td><asp:Label ID="lblOtherScreenName" runat="server" /></td>
    </tr>
    <tr>
        <td>Description</td>
        <td><asp:Label ID="lblOtherDescription" runat="server" /></td>
    </tr>
    <tr>
        <td>Tweets</td>
        <td><asp:Label ID="lblOtherTweets" runat="server" /></td>
    </tr>
    <tr>
        <td>Followers</td>
        <td><asp:Label ID="lblOtherFollowers" runat="server" /></td>
    </tr>
    <tr>
        <td>Friends</td>
        <td><asp:Label ID="lblOtherFriends" runat="server" /></td>
    </tr>
    <tr>
        <td>Favorites</td>
        <td><asp:Label ID="lblOtherFavorites" runat="server" /></td>
    </tr>
    <tr>
        <td>Location</td>
        <td><asp:Label ID="lblOtherLocation" runat="server" /></td>
    </tr>
</table>
 
 
Namespaces
You will need to import the following namespaces.
C#
using System.Data;
using ASPSnippets.TwitterAPI;
 
VB.Net
Imports System.Data
Imports ASPSnippets.TwitterAPI
 
 
Login with Twitter Account and fetch the Twitter Account and Profile Details
When the Login Button is clicked, the Authorization process starts and the User is redirected to Twitter Authorization page when he has to grant permission to the App for accessing the Profile details such as Screen Name, Email Address, Twitter Id, etc.
Once the User granted permission, he is redirect back to the Page along with the Access Token.
Inside the Page Load event, the Access Token is used to access the Twitter OAUTH API and the Twitter Profile details are fetched using the FetchProfile method.
Finally the Twitter Profile details are returned using a DataTable.
C#
protected void Page_Load(object sender, EventArgs e)
{
    TwitterConnect.API_Key = "<Twitter API Key>";
    TwitterConnect.API_Secret = "<Twitter API Secret>";
    if (!this.IsPostBack)
    {
        if (TwitterConnect.IsAuthorized)
        {
            TwitterConnect twitter = new TwitterConnect();
 
            //LoggedIn User Twitter Profile Details
            DataTable dt = twitter.FetchProfile();
 
            imgProfile.ImageUrl = dt.Rows[0]["profile_image_url"].ToString();
            lblName.Text = dt.Rows[0]["name"].ToString();
            lblTwitterId.Text = dt.Rows[0]["Id"].ToString();
            lblScreenName.Text = dt.Rows[0]["screen_name"].ToString();
            lblDescription.Text = dt.Rows[0]["description"].ToString();
            lblTweets.Text = dt.Rows[0]["statuses_count"].ToString();
            lblFollowers.Text = dt.Rows[0]["followers_count"].ToString();
            lblFriends.Text = dt.Rows[0]["friends_count"].ToString();
            lblFavorites.Text = dt.Rows[0]["favourites_count"].ToString();
            lblLocation.Text = dt.Rows[0]["location"].ToString();
            lblEmail.Text = dt.Rows[0]["email"].ToString();
            tblTwitter.Visible = true;
 
            //Any other User Twitter Profile Details. Here jQueryFAQs
            dt = twitter.FetchProfile("jQueryFAQs");
            imgOtherProfile.ImageUrl = dt.Rows[0]["profile_image_url"].ToString();
            lblOtherName.Text = dt.Rows[0]["name"].ToString();
            lblOtherTwitterId.Text = dt.Rows[0]["Id"].ToString();
            lblOtherScreenName.Text = dt.Rows[0]["screen_name"].ToString();
            lblOtherDescription.Text = dt.Rows[0]["description"].ToString();
            lblOtherTweets.Text = dt.Rows[0]["statuses_count"].ToString();
            lblOtherFollowers.Text = dt.Rows[0]["followers_count"].ToString();
            lblOtherFriends.Text = dt.Rows[0]["friends_count"].ToString();
            lblOtherFavorites.Text = dt.Rows[0]["favourites_count"].ToString();
            lblOtherLocation.Text = dt.Rows[0]["location"].ToString();
            tblOtherTwitter.Visible = true;
 
            btnLogin.Enabled = false;
        }
        if (TwitterConnect.IsDenied)
        {
            ClientScript.RegisterStartupScript(this.GetType(), "key", "alert('User has denied access.')", true);
        }
    }
}
 
protected void btnLogin_Click(object sender, EventArgs e)
{
    if (!TwitterConnect.IsAuthorized)
    {
        TwitterConnect twitter = new TwitterConnect();
        twitter.Authorize(Request.Url.AbsoluteUri.Split('?')[0]);
    }
}
 
VB.Net
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
    TwitterConnect.API_Key = "<Twitter API Key>"
    TwitterConnect.API_Secret = "<Twitter API Secret>"
    If Not Me.IsPostBack Then
        If TwitterConnect.IsAuthorized Then
            Dim twitter As New TwitterConnect()
 
            'LoggedIn User Twitter Profile Details
            Dim dt As DataTable = twitter.FetchProfile()
            imgProfile.ImageUrl = dt.Rows(0)("profile_image_url").ToString()
            lblName.Text = dt.Rows(0)("name").ToString()
            lblTwitterId.Text = dt.Rows(0)("Id").ToString()
            lblScreenName.Text = dt.Rows(0)("screen_name").ToString()
            lblDescription.Text = dt.Rows(0)("description").ToString()
            lblTweets.Text = dt.Rows(0)("statuses_count").ToString()
            lblFollowers.Text = dt.Rows(0)("followers_count").ToString()
            lblFriends.Text = dt.Rows(0)("friends_count").ToString()
            lblFavorites.Text = dt.Rows(0)("favourites_count").ToString()
            lblLocation.Text = dt.Rows(0)("location").ToString()
            lblEmail.Text = dt.Rows(0)("email").ToString()
            tblTwitter.Visible = True
 
            'Any other User Twitter Profile Details. Here jQueryFAQs
            dt = twitter.FetchProfile("jQueryFAQs")
            imgOtherProfile.ImageUrl = dt.Rows(0)("profile_image_url").ToString()
            lblOtherName.Text = dt.Rows(0)("name").ToString()
            lblOtherTwitterId.Text = dt.Rows(0)("Id").ToString()
            lblOtherScreenName.Text = dt.Rows(0)("screen_name").ToString()
            lblOtherDescription.Text = dt.Rows(0)("description").ToString()
            lblOtherTweets.Text = dt.Rows(0)("statuses_count").ToString()
            lblOtherFollowers.Text = dt.Rows(0)("followers_count").ToString()
            lblOtherFriends.Text = dt.Rows(0)("friends_count").ToString()
            lblOtherFavorites.Text = dt.Rows(0)("favourites_count").ToString()
            lblOtherLocation.Text = dt.Rows(0)("location").ToString()
            tblOtherTwitter.Visible = True
 
            btnLogin.Enabled = False
        End If
 
        If TwitterConnect.IsDenied Then
            ClientScript.RegisterStartupScript(Me.[GetType](), "key", "alert('User has denied access.')", True)
        End If
    End If
End Sub
 
Protected Sub btnLogin_Click(sender As Object, e As EventArgs)
    If Not TwitterConnect.IsAuthorized Then
        Dim twitter As New TwitterConnect()
        twitter.Authorize(Request.Url.AbsoluteUri.Split("?")(0))
    End If
End Sub
 
 
Screenshots
Twitter App Permission page
Login with Twitter in ASP.Net and get User Account and Profile details and Image
 
Message displayed when User denies permission
Login with Twitter in ASP.Net and get User Account and Profile details and Image
 
Successful Twitter Login
Login with Twitter in ASP.Net and get User Account and Profile details and Image
 
 
Demo
 
 
Downloads