Use of xml.modify to insert parameters into specific element of an xml column

Question

I would like to use a stored procedure to insert some values passed in as parameters into elements in the xml of a column. I have this so far The following parameters:

Answer 1

declare @XML xml = '

  20
  
    BC4A18CA-AFB5-4268-BDA9-C990DAFE7783
    somename
    
      
         activity1
      
    
  
'

declare @user_id nvarchar(50) = '20'
declare @activity_name nvarchar(50) = 'activity1'
declare @display_name nvarchar(50) = 'displayname1'

set @xml.modify('insert {sql:variable("@display_name")}
                 into (/Profile[ID = sql:variable("@user_id")]
                       /User/Activities/
                       Activity[Name = sql:variable("@activity_name")])[1]')

Result:

  20
  
    BC4A18CA-AFB5-4268-BDA9-C990DAFE7783
    somename
    
      
        activity1
        displayname1