位图克隆上的 C# WinForms 内存不足异常

Leon，我已经更改了您上传的代码，以不锁定任何资源。我注意到，如果我保持您的应用程序打开状态，我将无法删除输出文件夹，因为某些文件正在使用中。这通常意味着您没有释放所有文件句柄，基本上它始终是最后一个文件。

在更改之前和之后，我无法在计算机上重现内存不足问题，似乎是文件非常大的问题？

好吧，无论如何，我发现您使用ImageBox加载白色和黑色资源并从光盘加载图像。这根本不需要，直接使用资源

Bitmap white = OomTestApp.Properties.Resources.white;
Bitmap black = OomTestApp.Properties.Resources.black;

然后要从光盘加载映像，只需使用Bitmap.FromFile

我添加了一些行以正确释放您的资源.Dispose没有使用using块的地方。

我还删除了Clone()调用，因为我认为绝对不需要它，因为您只是在计算原始图像的像素，并且您不会在该图像中绘制一些东西。那么克隆映像的必要性是什么呢？

这是完整的代码(从创建文件夹后开始(

if (errors == 0)
{
this.Height = 323;
goButton.Enabled = false;
stopButton.Enabled = true;
Bitmap white = OomTestApp.Properties.Resources.white;
Bitmap black = OomTestApp.Properties.Resources.black;
Bitmap bmWatermark = black;
Bitmap processImage = null;

progressBar1.Maximum = filesToProcess.Count;
foreach (string handleFile in filesToProcess)
{
    string fileName = System.IO.Path.GetFileName(handleFile);
    fileNameLabel.Text = "File: " + System.IO.Path.GetFileName(handleFile);
    try
    {
        // create backup if checked
        if (diOriginal != null)
        {
            System.IO.File.Move(handleFile, System.IO.Path.Combine(diOriginal.FullName, fileName));
            processImage = (Bitmap)Bitmap.FromFile(System.IO.Path.Combine(diOriginal.FullName, fileName));
        }
        else
        {
            processImage = (Bitmap)Bitmap.FromFile(handleFile);
        }
        double aspectRatio = (double)processImage.Width / (double)processImage.Height;
        using (Graphics gWatermark = Graphics.FromImage(processImage))
        {
            gWatermark.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            System.Drawing.SolidBrush drawBrush = new System.Drawing.SolidBrush(System.Drawing.Color.Black);
            // position watermark - watermark should be 10% of the image height
            int watermarkHeight = (int)(processImage.Height * 0.1);
            int watermarkPadding = (int)(watermarkHeight * 0.1); // not completely true, but asume watermark is square
            // calculate rectangle. if there is extra text, add extra padding below
            Rectangle watermarkArea = new Rectangle(watermarkPadding, processImage.Height - (watermarkPadding + (watermarkText.Text.Length == 0 ? 0 : watermarkPadding) + watermarkHeight), watermarkHeight, watermarkHeight);
            // determine color watermark
            bmWatermark = black;
            if (watermarkCombo.SelectedIndex == 0)
            {
                /*using (Bitmap watermarkClone = processImage.Clone(watermarkArea, processImage.PixelFormat))
                {*/
                var pixels = Pixels(processImage);
                if (pixels.Average((Func<Color, decimal>)Intensity) < 110) // human eye adoption; normal threshold should be 128
                {
                    bmWatermark = white;
                    drawBrush = new System.Drawing.SolidBrush(System.Drawing.Color.White);
                }
                //}
            }
            else if (watermarkCombo.SelectedIndex == 1)
            {
                bmWatermark = white;
                drawBrush = new System.Drawing.SolidBrush(System.Drawing.Color.White);
            }
            // draw the watermark
            gWatermark.DrawImage(bmWatermark, watermarkArea.X, watermarkArea.Y, watermarkArea.Width, watermarkArea.Height);
            // draw the text (if needed)
            if (watermarkText.Text.Length > 0)
            {
                System.Drawing.Font drawFont = new System.Drawing.Font("Tahoma", (float)watermarkPadding);
                gWatermark.DrawString(watermarkText.Text, drawFont, drawBrush, watermarkPadding, processImage.Height - (watermarkPadding * 2));
                drawFont.Dispose();
            }
            // disposing resources
            drawBrush.Dispose();
        }
        // save the watermarked file
        processImage.Save(System.IO.Path.Combine(diWatermarked.FullName, fileName), System.Drawing.Imaging.ImageFormat.Jpeg);

        // stop button pressed?
        Application.DoEvents();
        if (stopProcess) break;
        // update exection progress
        progressBar1.Value++;
        percentLabel.Text = ((int)((progressBar1.Value * 100) / filesToProcess.Count)).ToString() + "%";
        fileCountLabel.Text = "File " + progressBar1.Value.ToString() + "/" + filesToProcess.Count.ToString();
    }
    catch (Exception ex)
    {
        try
        {
            using (System.IO.StreamWriter sw = new System.IO.StreamWriter(System.IO.Path.Combine(folderText.Text, "errorlog.txt"), true))
            {
                sw.WriteLine("File: " + fileName);
                while (ex != null)
                {
                    sw.WriteLine("Message: " + ex.Message);
                    sw.WriteLine(ex.StackTrace);
                    sw.WriteLine(ex.Source);
                    ex = ex.InnerException;
                }
                sw.WriteLine();
            }
        }
        catch
        {
            // nothing to do - it already failed
        }
        errors++;
    }
    finally
    {
        if (processImage != null) processImage.Dispose();
    }
}
// dispose resources
white.Dispose();
black.Dispose();
bmWatermark.Dispose();

if (!stopProcess)
{
    // set status to complete
    fileCountLabel.Text = "File " + filesToProcess.Count.ToString() + "/" + filesToProcess.Count.ToString();
    percentLabel.Text = "100%";
    fileNameLabel.Text = "Completed...";
}
else
{
    fileNameLabel.Text = "Aborted...";
}
fileNameLabel.Text += errors.ToString() + " error(s) encountered";
// defaults to screen
progressBar1.Value = progressBar1.Maximum;
stopProcess = false;
goButton.Enabled = true;
stopButton.Enabled = false;

好吧，我没有阅读页面上的所有内容，但我想知道是否有人提到位图的"步伐"？基本上，位图必须是 4 字节的倍数。我在拆开网格制作瓷砖时遇到了这个问题。最后一个磁贴会出错，因为位图不能被 4 整除。

步幅是单行像素(扫描线(的宽度， 向上舍入为四字节边界。如果步幅为正，则 位图是自上而下的。如果步幅为负，则位图为 自下而上。 https://softwarebydefault.com/2013/04/11/bitmap-color-balance/