Download Google Contact API from below link.
http://google-gdata.googlecode.com/files/Google%20Data%20API%20Setup%281.4.0.2%29.msi
Add reference to your project following DLL files.
Google.GData.Apps.dll, Google.GData.Client.dll, Google.GData.Contacts.dll, Google.GData.Extensions.dll
.Aspx page look like this
<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>IMport Gmail Contacts</title> </head> <body> <form id="frmGmailContacts" runat="server"> <div> <table> <tr> <td> UserName</td> <td> <asp:TextBox ID="txtUsername" runat="server"></asp:TextBox> </td> </tr> <tr> <td> Password</td> <td> <asp:TextBox ID="txtPassword" runat="server" TextMode="Password"> </asp:TextBox> </td> </tr> <tr> <td> </td> <td> <asp:Button ID="btnImport" runat="server" Text="Import" onclick="btnImport_Click" /> </td> </tr> </table> </div> <div> <asp:GridView ID="gdvContacts" runat="server"></asp:GridView> </div> </form> </body> </html>
Code behind page:
public static DataSet GetGmailContacts(string App_Name, string Uname, string UPassword) { DataSet ds = new DataSet(); DataTable dt = new DataTable(); DataColumn C2 = new DataColumn(); C2.DataType = Type.GetType("System.String"); C2.ColumnName = "EmailID"; dt.Columns.Add(C2); RequestSettings rs = new RequestSettings(App_Name, Uname, UPassword); rs.AutoPaging = true; ContactsRequest cr = new ContactsRequest(rs); Feed<Contact> f = cr.GetContacts(); foreach (Contact t in f.Entries) { foreach (EMail email in t.Emails) { DataRow dr1 = dt.NewRow(); dr1["EmailID"] = email.Address.ToString(); dt.Rows.Add(dr1); } } ds.Tables.Add(dt); return ds; } protected void Button1_Click(object sender, EventArgs e) { DataSet ds = GetGmailContacts("Import GMAIL Contacts", txtUsername.Text, txtPassword.Text); gdvContacts.DataSource = ds; gdvContacts.DataBind(); }