Integration to Dynamics CRM

Dear Communities,

We've web page it was developed by Asp.net MVC. In that webpage users can able to upload their details and enquiry product. Here how we can integrate those user details into MS CRM? Shall we achieve this one using with connectingstring?

<connectionStrings>
<add name="MyConnectionString" connectionString="Server=Your_Organization_Url/;Username=Your_User_id_of_Online_Org;Password=Your_Password"/>
</ connectionStrings>

Is there any best way to do it?

Regards

Dhan