位图一般错误或参数无效

Question

我有一种延迟方法，根据流大小引发异常。我有一种感觉，问题是内存限制。有人能解释我为什么会得到这些错误以及如何解决这个问题？

    private List<MemoryStream> streams = new List<MemoryStream>();

    private byte[] GetReportImage(IReportDocument report, bool portrait)
    {
        var processor = new ReportProcessor();
        var reportSource = new InstanceReportSource();
        reportSource.ReportDocument = report;
        var deviceInfo = new System.Collections.Hashtable();
        deviceInfo["OutputFormat"] = "PNG";
        deviceInfo["DpiX"] = portrait ? imagePortraitDpi : imageLandscapeDpi;
        deviceInfo["DpiY"] = portrait ? imagePortraitDpi : imageLandscapeDpi;
        string documentName = "";
        this.streams.Clear();

        MemoryStream resultStream;
        try
        {
            var result = processor.RenderReport("IMAGE", reportSource, deviceInfo, new CreateStream(CreateStream), out documentName);
            var width = portrait ? widthPortait : widthLandscape;
            var height = portrait ? heightPortrait : heightLandscape;
            using (resultStream = new MemoryStream())
            {
                using (var resultBitmap = new Bitmap(width, height * streams.Count)) <- here parameter is not valid c#
                {
                    using (var graphics = Graphics.FromImage(resultBitmap))
                    {
                        int offsetY = 0;
                        foreach (var stream in this.streams)
                        {
                            graphics.DrawImage(Image.FromStream(stream), 0, offsetY, width, height);
                            offsetY += height;
                            graphics.Save();
                        }
                    }
                    resultBitmap.Save(resultStream, System.Drawing.Imaging.ImageFormat.Png); <-- here A generic error occurred in GDI+.
                }
            }
        }
        finally
        {
            foreach (var stream in this.streams)
                stream.Close();
        }
        return resultStream.ToArray();
    }

宽度= 994; 身高= 703;

当streams.Count = 90和streams.Sum（p =＆gt; p.Length）= 1261524时 - 没有抛出任何异常，一切正常。 当streams.Count = 96和streams.Sum（p =＆gt; p.Length）= 1342111时 - GDI +中发生一般错误。 当streams.Count = 119和streams.Sum（p =＆gt; p.Length）= 1556359 - 参数无效