google API for authentication

Question

Hi All i have one asp.net mvc 4 application. i need to create google API for authentication. like if I login with abc@dfdfdf.com it should validate against google password and let me in just check if my mail id is existing in employee table and call google API for authentication. so that people don't have to remember new password please help me.

Manas Mohapatra · Answer

First you need to check E-mail in Database. Please find below links: http://www.c-sharpcorner.com/UploadFile/20abe2/how-to-check-user-name-or-email-availability-using-Asp-Net/ http://www.dotnetfunda.com/articles/show/2297/how-to-check-whether-username-exists-in-database-without-refreshing-pa Secondly once user is verified in your Database you need to validate through Google API. Here are the links: http://www.c-sharpcorner.com/UploadFile/vdtrip/google-plus-authentication-in-Asp-Net-and-C-Sharp/ http://www.aspsnippets.com/Articles/Login-with-Google-Account-API-in-ASPNet-and-get-Google-Plus-Profile-details.aspx