How to Import contacts from different social apps

I am developing a social application using ASP.net and C# under .Net Framework 4.0.

I need to provide a facility to import/export contacts from the following:

• Gmail
• AOL
• Yahoo
• Hotamil
• Microsoft Outlook Express

Unti开发者_运维问答l now, I only find the way for importing/exporting contacts at gmail using Google Contact Data API. Does anyone know how to deal with rest of those?

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Here open source library to import contact from the gmail,yao and etc..

http://sourceforge.net/projects/opencontactsnet/

thank you

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you will need to get the API for each service, some might be easier than others. try an ask specific questions about the problems you find using each one

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You can use OpenID to do the same. Refer the site: http://openid.net

Specifically this: http://openid.net/add-openid/

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try using with Google.GData.Contacts.dll ,Google.GData.Apps.dll

username=your emailid;
 password=email password;
app_name="MyNetwork Web Application!";
DataSet ds = GmailContacts.GetGmailContacts(App_Name, username, password);
GridView1.DataSource = ds;
GridView1.DataBind();