title: Off-the-shelf UI component for table-to-table field mapping?
body: <p>I wanted to check with the community if there is any existing off-the-shelf component or library that handles table-to-table field mappings, specifically, defining meta-data for the data fields.</p>
  
  <p><a href="http://i.stack.imgur.com/q5gUb.png" rel="nofollow">Example (from Salesforce's UI):</a></p>
  
  <p>Simply put, my inputs would be a list of source fields and target fields, and the UI component should allow the user to map one to the other, or have a source field not map to any target field at all.</p>
  
  <p>Since I've seen this UI component so many times in various corporate systems, now that I need it I wanted to see if it was out there in one form or another before we start building. I'd be particularly interested in C# or Web (JS) oriented solutions, but would take anything for reference.</p>
  
  <p>Thanks!</p>