Question

我看到可能的内存泄漏，我正在使用一些代码来加载WF .NET Activity工具箱活动的图标。检索图标的建议方法是使用反射，但是在关闭对话框后，反射似乎会导致应用程序挂起到内存中的对象上。症状基本上是在重复打开和关闭对话框时应用程序大小继续增加（甚至在强制执行垃圾收集之后）。

任何想法，或者之前有人见过这个？代码如下：

    private void CreateToolboxBitmapAttributeForActivity(AttributeTableBuilder builder, Type activityType, Type activityImageType, string imageName)
    {
        if (activityImageType != null && !string.IsNullOrEmpty(imageName))
        {
            Bitmap bitmap = LoadIconImage(activityImageType.Assembly, imageName);

            if (bitmap != null)
            {     
                Type tbaType = typeof(System.Drawing.ToolboxBitmapAttribute);
                Type imageType = typeof(System.Drawing.Image);

                ConstructorInfo constructor = tbaType.GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new Type[] { imageType, imageType }, null);
                System.Drawing.ToolboxBitmapAttribute tba = constructor.Invoke(new object[] { bitmap, bitmap }) as System.Drawing.ToolboxBitmapAttribute;
                builder.AddCustomAttributes(activityType, tba);
            }
        }
    }

Bitmap的加载方式如下：

    private Bitmap LoadIconImage(Assembly a, string imageName)
    {
        Bitmap bmp = null;

        // attach to stream to the resource in the manifest
        Stream imgStream = a.GetManifestResourceStream(imageName);

        if (!(null == imgStream))
        {
            // create a new bitmap from this stream and 
            // add it to the arraylist
            bmp = Bitmap.FromStream(imgStream) as Bitmap;

            imgStream.Close();
            imgStream.Dispose();
            imgStream = null;
        }

        return bmp;
    }

作为参考，我基本上使用此处详述的方法：Displaying .NET Framework 4 Built-In Workflow Activity Icons in a rehosted Workflow Designer

ToolboxBitmapAttribute内存泄漏？

0 个答案: