请问使用extjs如何上串图片到数据库中啊

我就是看这个例子的啊

可是数据库怎么操作啊
Dim ifile As Integer = 0
Dim postedFile As HttpPostedFile
Try
For ifile = 0 To files.Count - 1
postedFile = files(ifile)
Next

Catch ex As Exception
Throw ex
End Try

Dim intImageSize As Integer
Dim strImageType As String
Dim ImageStream As Stream
intImageSize = postedFile.ContentLength
strImageType = postedFile.ContentType
ImageStream = postedFile.InputStream
Dim ImageContent(intImageSize) As Byte
Dim intStatus As Integer
intStatus = ImageStream.Read(ImageContent, 0, intImageSize)

是这样么