The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 3: Accessing FILESTREAM Data from Client ApplicationsSqlTransaction transaction = con.BeginTransaction("ItemTran");cmd.Transaction = transaction;SqlDataReader reader = cmd.ExecuteReader();if (reader.Read()){txContext = (reader["txContext"] as byte[]);filePath = reader["filePath"].ToString();}reader.Close();Listing 3-15:Inserting a record and retrieving the FILESTREAM file path and transaction context.Once we have the logical path to the FILESTREAM data file and the FILESTREAMtransaction context, we can write the binary data (the content of the disk file that storesthe image) into the FILESTREAM store, as shown in Listing 3-16.//Open the FILESTREAM data file for writingSqlFileStream fs = new SqlFileStream(filePath, txContext,FileAccess.Write);// Open the disk file for readingFileStream localFile = new FileStream("C:\\temp\\microsoftmouse.jpg",FileMode.Open, FileAccess.Read);//Copy data from disk file to FILESTREAM columnlocalFile.CopyTo(fs, 4096);Listing 3-16:Writing the content of a byte array into a FILESTREAM data file.And finally, we close the FILESTREAM file, commit the transaction, and close thedatabase connection to complete the exercise (Listing 3-17).//Close the fileslocalFile.Close();fs.Close();108