VB.NET图片存储数据库教程

Imports System.IO
Imports System.Data.OleDb
Public Class FrmYuangong

    Dim bmdata As BindingManagerBase  '定义一个公有变量
    Private Sub settextboxfalse() '设置捆绑的控件都不可用
        Textbianhao.Enabled = False
        Comxingbie.Enabled = False
        Textdianhua.Enabled = False
        Textxiangpian.Enabled = False
        Textxingming.Enabled = False
        Textyouxiang.Enabled = False
        Textzhuzhi.Enabled = False
        Butxuantu.Enabled = False
    End Sub

    Private Sub settextboxtrue()
        '设置捆绑的控件都可用
        Comxingbie.Enabled = True
        Textdianhua.Enabled = True
        Textxiangpian.Enabled = True
        Textxingming.Enabled = True
        Textyouxiang.Enabled = True
        Textzhuzhi.Enabled = True
        Butxuantu.Enabled = True
    End Sub

     Private Sub tupianJZ()
        Try
            Dim ImgByt() As Byte

            Dim ImgMS As IO.MemoryStream
            Dim i As Integer
            i = bmdata.Position
            ImgByt = CType(DataSet61.Tables("员工").Rows(i).Item("相片"), Byte())
            ImgMS = New IO.MemoryStream(ImgByt)
            PictureBox1.Image = Drawing.Image.FromStream(ImgMS)
        Catch ex As Exception
            PictureBox1.Image = Image.FromFile(Application.StartupPath & "\无图.jpg")
        End Try
    End Sub

    Private Sub updatedatasource(ByVal changedrows As DataSet)  '更新数据源的自定义过程
        Try
            If (Not (changedrows) Is Nothing) Then
                OleDbConnection1.Open()
                OleDbDataAdapter1.Update(changedrows)  '把数据集changedrows对象中的数据更新到数据源
            End If
        Catch updateexception As System.Exception
            Throw updateexception
        Finally
            OleDbConnection1.Close()
        End Try
    End Sub

    Public Sub updatedataset()  '更新数据集自定义过程
        Dim datasetchanges As DataSet '创建一个新数据集来保存对主数据集所做的更改
        bmdata.EndCurrentEdit()   '停止当前的任何编辑
        datasetchanges = CType(DataSet61.GetChanges, DataSet) '获得对主数据的更改
        If (Not (datasetchanges) Is Nothing) Then    '检查是否做了任何更改
            Try