用VB实现图形文件的批量转换 黄登科 2001年 14期 由于工作的原因,这段时间我在处理多媒体、创建网站的时候,经常会遇到要转换大量图片的大小这种情况。而我们经常用到的图形处理工具,如PHOTOSHOP、FIREWORKS等软件,它们虽然能够改变图形的大小,但一般只能进行单个文件的转换,在需要转换大量文件的时候效率十分低。为了提高工作效率,我用VB编写了一个批量转换图形文件大小的程序,虽然界面比较粗糙,但比较实用。   #1 程序界面如^14020501a^   #1 设计思路:    如上图所示,左边的图形框为Picture1,里面显示的就是要转换的图形文件,右边的图形框为Picture2,里面显示的就是转换后的图形文件。    首选通过CommonDialog控件选择图形文件,然后显示在Picture1上(注意:Picture1的AutoRedraw属性要设为True,AutoSize属性要设为True):Picture1.Picture = LoadPicture(CommonDialog1.FileName),然后设置分辨率(res=200),再设置坐标,把两个Picturebox的绘图区都设成长宽均为分辨率大小的坐标:Picture1.Scale(0,0)-(res,res),Picture2.Scale(0,0)-(res,res),当点击“开始转换”按钮时,将左图坐标(I,J)的点画到右图上:    For I=1 to res    For j=1 to res    Picture2.Pset(I,j),Picture1.point(I,j)    next j    next I    最后存储Picture2上的图形。   #1 程序代码:    以下是批量转换Pic1至Pic10这十个文件的程序代码:    Dim res As Integer '定义分辨率为全局变量    Private Sub Command2_Click() '点击“选择文件”按钮    CommonDialog1.filename = “”    Picture1.Picture = LoadPicture(CommonDialog1.filename)    CommonDialog1.Filter = “(*.jpg)|*.jpg|(*.bmp)|*.bmp”    CommonDialog1.DialogTitle = “打开图形文件”    CommonDialog1.Action = 1    Picture1.Picture = LoadPicture(CommonDialog1.filename)    End Sub    Private Sub command3_Click() '点击“批量转换”按钮    On Error GoTo errorhandler    CommonDialog1.filename = “”    Picture1.Picture = LoadPicture(CommonDialog1.filename)    CommonDialog1.Filter = “(*.jpg)|*.jpg|(*.bmp)|*.bmp”    CommonDialog1.DialogTitle = “打开图形文件”    CommonDialog1.Action = 1    Dim i,j,w,h,pd As Integer    Dim filelen, k As Integer    Dim filename As String    filelen = Len(CommonDialog1.filename)    pd = MsgBox(“是否按默认设置?”,vbYesNo,“选择框”)    If pd = 7 Then    w = InputBox(“请输入转换后的图形宽:”,“输入框:”,,0,0)    If w < 50 And w > 200 Then    GoTo handler    End If    h = InputBox(“请输入转换后的图形高:”,“输入框:”,,0,0)    If h < 50 And h > 200 Then    GoTo handler    End If    Picture2.Width = w * 15.3    Picture2.Height = h * 15.3    End If    For k = 1 To 10    filename = Left(CommonDialog1.filename, filelen - 5) & Trim(Str(k)) &- Right(CommonDialog1.filename,4) '批量载入pic1,pic2,……pic10    Picture1.Picture = LoadPicture(filename)    Picture1.Scale (0,0)-(res,res)    Picture2.Scale (0,0)-(res,res)    For i = 1 To res    For j = 1 To res    Picture2.PSet (i,j),Picture1.Point(i,j)    Next j    Next i    SavePicture Picture2.Image,Left(CommonDialog1.filename,filelen - 5) & Trim(Str(k)) &- “.bmp” '批量保存文件    Command4.Caption = filename    'Picture1.Visible = True    'Picture1.Picture = Picture2.Picture    Next k    Command4.Caption = “转换完毕”    errorhandler:    MsgBox (“文件不存在或存在错误!”)    handler    If w < 50 And w > 200 Or h < 50 And h > 200 Then    MsgBox “你输入的数字不对!”    End If    End Sub    Private Sub Form_Load()    res = 200 '设置分辨率为200    End Sub    Private Sub Command1_Click() '点击“开始转换”按钮    Dim i,j,w,h,pd As Integer    pd = MsgBox(“是否按默认设置?”, vbYesNo,“选择框”)    If pd = 7 Then    w = InputBox(“请输入转换后的图形宽:”,“输入框:”,,0,0)    If w < 50 And w > 200 Then    GoTo handler    End If    h = InputBox(“请输入转换后的图形高:”,“输入框:”,,0,0)    If h < 50 And h > 200 Then    GoTo handler    End If    Picture2.Width = w * 15.3    Picture2.Height = h * 15.3    End If    Picture1.Scale (0,0)-(res,res)    Picture2.Scale (0,0)-(res,res)    For i = 1 To res    For j = 1 To res    Picture2.PSet (i,j),Picture1.Point(i,j)    Next j    Next i    SavePicture Picture2.Image,Left(CommonDialog1.filename,filelen - 5) & Trim(Str(k)) &- “.bmp”    handler:    If w < 50 And w > 200 Or h < 50 And h > 200 Then    MsgBox “你输入的数字不对!”    End If    End Sub