删除文件时我的代码出错？[副本]

Question

我在路径中编辑pic文件并为其创建新的图像文件。我的代码是：

string[] files = Directory.GetFiles(string.Concat(Server.MapPath("/"), "tmp/"));
foreach (string path in files)
{
    string filename = Path.GetFileName(path);
    using (Bitmap b = new Bitmap(string.Concat(Server.MapPath("/"), "tmp/", filename)))
    {

        SolidBrush pixelBrush = new SolidBrush(Color.White);
        Graphics g = Graphics.FromImage(b);
        g.FillRectangle(Brushes.White, 0, 0, 105, 40);

        string outputFileName = string.Concat(Server.MapPath("/"), "tmp\\E", filename);
        MemoryStream memory = new MemoryStream();
        FileStream fs = new FileStream(outputFileName, FileMode.Create, FileAccess.ReadWrite);
        b.Save(memory, ImageFormat.Jpeg);
        byte[] bytes = memory.ToArray();
        fs.Write(bytes, 0, bytes.Length);
        fs.Close();
        memory.Close();
        b.Dispose();
    }
    File.Delete(path);
}

怎么修？

Answer 1

用using包装图形将会修复它。你也应该把它处理掉。

            using (Bitmap b = new Bitmap(filePath))
            {
                using (Graphics g = Graphics.FromImage(b))
                {
                    ...
                }
            }

此外，您还可以通过组合使用using语句。

        foreach (var path in files)
        {
            var filename = Path.GetFileName(path);
            var filePath = string.Concat(tmpPath, filename);
            using (var b = new Bitmap(filePath))
            using (var g = Graphics.FromImage(b))
            {
                g.FillRectangle(Brushes.White, 0, 0, 105, 40);
                var outputFileName = string.Concat(newPath, filename);

                using (var memory = new MemoryStream())
                using (var fs = new FileStream(outputFileName, FileMode.Create, FileAccess.ReadWrite))
                {
                    b.Save(memory, ImageFormat.Jpeg);
                    var bytes = memory.ToArray();
                    fs.Write(bytes, 0, bytes.Length);
                }
            }
            File.Delete(path);
        }