Sql Server中Image类型字段在VB.NET中的读写操作

　　1.图片文件写入
　　            Dim tmpImg As image                    
　　            Dim r As DataRow                         
　　            Dim ms As New MemoryStream    
　　            Dim data() As Byte                         

　　            r = myDataSet.Tables(myTableName).NewRow
　　            tmpImg = Image.FromFile("c:xxx.jpg")
　　            tmpImg.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg)
　　            tmpImg.Dispose()
　　            ReDim data(ms.Length)
　　            ms.Position = 0
　　            ms.Read(data, 0, System.Convert.ToInt32(ms.Length))

　　            ...
　　            ...          
　　            r("pic") = data
　　            myDataSet.Tables(myTableName).Rows.Add(r)
　　            ...

　　2.图片数据的读出
　　            Dim tmpImg As image                    
　　            Dim r As DataRow                         
　　            Dim ms As New MemoryStream    
　　            Dim data() As Byte                         
　　            Dim r As Integer

　　            data=myDataSet.Tables(myTableName).Rows(r).Item("pic")
　　            ms = New MemoryStream
　　            ms.Write(data(0), 0, data(0).GetUpperBound(0))
　　           
　　            '在窗体中显示
　　            Me.pic0.Image = Image.FromStream(msImg(0))
　　           
　　            '存入到文件
　　            If  FileI.Exists("c:xxx.jpg") Then
　　                  File.Delete("c:xxx.jpg")
　　            End If
　　            fs = File.Create("c:xxx.jpg")
　　            fs.Write(data, 0, data.GetUpperBound(0))
　　            fs.Close()