System.Data.SqlClient.SqlException: String or binary data would be truncated. The statement has been terminated.

It sounds like you're trying to insert data into a column whose length exceeds the maximum length for the column.

For example, you're trying to insert more than 8000 bytes into a column of type varchar.

So I'd check to see if that's the case and, if it is, try and abbreviate the data to fit into the column.