Best approcach on changing templates in a document library

Question

Hello,
In a document library, I need to have hold two types of word documents - a) with one place for signing and b) with two places for signing. There are document templates for each one.
My approach to to use two content types, A1 for one sign and B2 for two signs. Each one will have its own document template and  an event receiver will fill the docx's fields  with data.
Now, there's a new specification: The user should be able to change from content type A1 to B2 and vice versa. The document should change accordingly.
My solution is an event receiver that will change the content type of the document, clear the contents of the existing docx, fill it up with the new document template's info and then fill ups the templates' fields.
Is there another approach, because this  doesn't look straightforward to me. I wish I could some how swap the docx and then fillup the data, The option of deleting the document and recreating it, is my  very last option.
Thank you
Christos

Answer 1

What you trying is better. check below
http://social.msdn.microsoft.com/Forums/sharepoint/en-US/c99b4599-0864-48bb-9977-2dd2066fbbb8/sp-gugu-how-to-programmatically-change-a-list-items-contenttype-by-wss-webservice?forum=sharepointdevelopmentlegacy
http://stackoverflow.com/questions/4735572/could-not-change-the-content-type-of-a-document-list-item-in-a-document-library
// get the list item that you need to update (do this however is appropriate) SPListItem listItem; // get the list that the item is in SPList myList = listItem.ParentList; // Get the contnet type you want to change
it to // (Note: must already be associated with the pages library) SPContentType contentType = myList.ContentTypes["New Content Type Name"]; // Update the properties listItem["Content Type"] = contentType.Name; listItem["Content Type
ID"] = contentType.Id.ToString(); // Record the change without adding a new version number of changing the last modified by listItem.SystemUpdate();
Read more at
http://blog.brianfarnhill.com/2008/10/programmatically-changing-list-item-content-types#XSRrIpffUYMy7MAd.99
SPFile ofile = oweb.GetFile(oweb.Url + '/' + oDocSet.Item.Url + '/' + refName);
ofile.Item["ContentType"] = octype.Name;
ofile.Item["ContentTypeId"] = octype.Id;
ofile.Item.Update();
Or try
http://blog.brianfarnhill.com/2008/10/programmatically-changing-list-item-content-types