When developing a web site that uses a database and that is to be deployed using
Web Deploy it is usually necessary to modify the connection string to be used in
the other environment.
Assuming you only need to change the connection string for just a specific Web
Deploy then you can do that with a transformation. The following should show
exactly what you need to do to do that. In my opinion the Microsoft
documentation is too general and tries to satisfy too many possibilities.
In Solution Explorer expand the Properties node to get the PublishProperties as
in the following.
Right-click on the Web Deploy profile and select Add Config Transform
as shown in the following.
You will get a Web.project - Web Deploy.config file in the Web Config
node. The initial contents will be the following.
In the example below, the "SetAttributes" transform will change the value of
"connectionString" to use "ReleaseSQLServer" only when the "Match" locator
finds an attribute "name" that has a value of "MyDB".
connectionString="Data Source=ReleaseSQLServer;Initial Catalog=MyReleaseDB;Integrated Security=True"
<compilation xdt:Transform="RemoveAttributes(debug)" />
In the example below, the "Replace" transform will replace the entire
<customErrors> section of your web.config file.
Note that because there is only one customErrors section under the
<system.web> node, there is no need to use the "xdt:Locator" attribute.
<error statusCode="500" redirect="InternalError.htm"/>
Change the sample to the following or add the following.
Where csname is the name in the Web.config of your connection string that
need to replace in the deployment. Do not change name in
That transformation is saying that you want to
search for the connection string that has the specified name and then change the
connection string value during the deployment.
There are many other transformations possible but if you only need to change the
connection string for a specific Web Deploy then that should be the most