Shulou(Shulou.com)06/01 Report--

Write a CLR extension DLL, in SQL directly read and write file extension function. Read data variables directly to a file.

The program was written in VS2010, in Vb.net.

There are four scalar functions:

GetFile_Str16(@PathFile NVARCHAR(max))--Return: NVARCHAR(max) --Read [file] into [hexadecimal numeric text]

PutFile_Str16(@PathFile NVARCHAR(max),@Str16 NVARCHAR(max))--Returns: Bit --Generate [file] with [hexadecimal numeric text]

GetFile_Binary(@PathFile NVARCHAR(max))--Return: VarBinary(Max) --Read [File] to [VarBinary]

PutFile_Binary(@PathFile NVARCHAR(max),@Bin VarBinary(Max))--Returns: Bit --Generate [File] with [VarBinary]

Yeah! To prevent the target file from being opened (locked) by other programs during reading, resulting in reading failure.

GetFile_Str16, GetFile_Binary, when the target file is locked, it will try to copy the target file to create a copy for reading.

Attachments include DLL files, VB.net source code, install (deploy) T-SQL scripts, uninstall T-SQL scripts, test T-SQL scripts.

and: stored procedure [FileToBin], which implements GetFile_Binary function in stored procedure mode.

Attachment: down.51cto.com/data/2367601

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