加载图像时内存不足异常

Question

我使用以下代码将图像作为缩略图加载到FlowLayoutPanel控件.不幸的是我得到了OutOfMemory异常.

正如您已经猜到的那样,内存泄漏是在线上找到的

 Pedit.Image = System.Drawing.Image.FromStream(fs)

那我怎么能优化下面的代码呢？

 Private Sub LoadImagesCommon(ByVal FlowPanel As FlowLayoutPanel, ByVal fi As FileInfo)
        Pedit = New DevExpress.XtraEditors.PictureEdit
        Pedit.Width = txtIconsWidth.EditValue
        Pedit.Height = Pedit.Width / (4 / 3)
        Dim fs As System.IO.FileStream
        fs = New System.IO.FileStream(fi.FullName, IO.FileMode.Open, IO.FileAccess.Read)
        Pedit.Image = System.Drawing.Image.FromStream(fs)
        fs.Close()
        fs.Dispose()
        Pedit.Properties.SizeMode = DevExpress.XtraEditors.Controls.PictureSizeMode.Zoom

        If FlowPanel Is flowR Then
            AddHandler Pedit.MouseClick, AddressOf Pedit_MouseClick
            AddHandler Pedit.MouseEnter, AddressOf Pedit_MouseEnter
            AddHandler Pedit.MouseLeave, AddressOf Pedit_MouseLeave
        End If

        FlowPanel.Controls.Add(Pedit)
    End Sub

更新:加载大量图像时出现问题(3264x2448px为300dpi - 每个图像大约为3Mb)

Answer 1

Image.FromFile(与您相关的FromStream)文档说OutOfMemoryException如果文件不是有效的图像格式或者GDI +不支持像素格式,它将抛出.您是否可能尝试加载不受支持的图像类型？

此外,文档Image.FromStream说您必须在图像的生命周期内保持流打开,因此即使您的代码加载了图像,您可能会收到错误,因为您在图像仍处于活动状态时关闭了文件.请参阅http://msdn.microsoft.com/en-us/library/93z9ee4x.aspx.