The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 3: Accessing FILESTREAM Data from Client Applicationsusing System.Data.SqlTypes;using System.IO;public void SaveItemImage(){byte[] txContext = null;string filePath = string.Empty;// Create a connection to the databasestring ConStr = ("Data Source=(local);" +"Initial Catalog=NorthPole;Integrated Security=True");SqlConnection con = new SqlConnection(ConStr);con.Open();Listing 3-14:Creating a connection to the SQL Server instance.Note that to access FILESTREAM data through the streaming API, you must connect toSQL Server using Integrated Security (Windows authentication). If you connect to SQLServer using SQL Server authentication, you will get an "Access Denied" error when youtry to open the FILESTREAM data file.Next, we insert a row with a dummy value into the FILESTREAM column in the Itemstable, using the T-SQL INSERT statement shown in Listing 3-15. Notice the OUTPUTclause, which returns the path name associated with the FILESTREAM column of thenewly inserted row, along with the current FILESTREAM transaction context.// Insert a record to the table and retrieve the PathName()// A dummy value is inserted to the ItemImage column to obtain a valid PathName()SqlCommand cmd = new SqlCommand();cmd.Connection = con;cmd.CommandText = "INSERT INTO Items " +"(ItemID, ItemNumber, ItemDescription, ItemImage)" +"OUTPUT GET_FILESTREAM_TRANSACTION_CONTEXT() AS txContext," +" inserted.ItemImage.PathName() AS filePath " +"SELECT NEWID(), 'A0001', 'Microsoft Mouse', 0x";107