You can call SetMailMerge once for each instance of WordTemplate. If you are using the Excel 2003 binary template file type (.xls/.xlt), you can call SetMailMerge or SetRepeatBlock, but not both.
Additionally, only the page content is repeated for each row, not the entire page itself. If you wish to have the page itself repeat for each row, you will need to remember to place a page break at the bottom of the page.
Merge Fields for using the SetMailMerge method must not specify a data source – the data source is implied, and using a data source name will cause WordTemplate to throw an error. Valid merge field formats for use with SetDataSource include field names («fieldname») and field ordinals («#1»).
This is an extension method for the WordTemplate object to be used for binding SharePoint data to applications from within SharePoint. To use this method, you must add a reference to SoftArtisans.OfficeWriter.WordWriter.SharePointIntegration.dll