Below is the basic setting for connection string.
But which database you want to connect, it have some changes for acess/excel
<connectionStrings>
<add name="hhcsnot" connectionString="Server=database_server_ip;Initial Catalog=databasename;User ID=username;Password=yourpassword"/>
</connectionStrings>
or you can just drag and drop a table from server explorer(connect your database here with studio) in visual studio, It creates automatic a connection string for you...
Thanks
Database Connection String in asp.net[
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