Windows Server How to configure ASPNET connection string ?

I am new to uploading websites online, I have uploaded my website to ASPHostPortal and run perfectly but i don't know how to connect my MS Sql Data base and how to configure my connection string !

Can any one help me or give me a tutorial of how doing this starting from a normal MS sql Database with normal connection string (Local DB and Local connection string) until uploading it online ?

Can you describe me step by step to connect my MS Sql Data base and configure my connection string or give me link to learn it ?

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