How to change the connection string with sed

I have a connection stri开发者_如何学编程ng in a ini file as following:

1 ...
2 ...
3 #someline:
n ConnectionString = "Data Source=localhost;Database=grid;User ID=grid;Password=grid;"

And I would like to locate to the line n and replcate Data Source, Database, User Id and Password field. So how can I make it in sed?

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sed -e 's/localhost/DataSource/' -e 's/grid/Database/' -e 's/grid/UserId/' -e 's/grid/Password'

This assumes that the fields are always in this order, and that the string 'grid' does not appear in either the text or any previously substitued fields.

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you can use awk

$ awk -vds="Datasource" -vdb="dbname" -vuser="userid" -vpswd="pass" '/Connection/{$0="Data Source="ds";Database="db";User ID="userid";Password="pswd}1' file