是否可以在C＃中快速加载和编码图像到base64？(Is it possible to load and encode images to base64 fast in C#?)

 我想加载一个图像并直接将其编码为base64字符串。 小/低分辨率图片加载速度很快，但加载iPhone 5拍摄的照片（例如2448 x 3264,2.61 MB）需要很长时间。 有没有办法在我的应用程序中更快地加载这些图像？ 
 
 这是我的C＃代码： 
 
private void button1_Click(object sender, EventArgs e)
    {
        Stream myStream = null;
        OpenFileDialog openFileDialog1 = new OpenFileDialog();
        //Setup OpenFileDialog

        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {
            if ((myStream = openFileDialog1.OpenFile()) != null)
            {
                using (myStream)
                {
                    string sFileName = openFileDialog1.FileName;
                    textBox1.Text = sFileName;
                    pictureBox1.ImageLocation = sFileName;
                    using (Bitmap bm = new Bitmap(sFileName))
                    {
                        using (var ms = new MemoryStream())
                        {
                            bm.Save(ms, ImageFormat.Jpeg);
                            base64 = Convert.ToBase64String(ms.ToArray());
                            textBox3.Text = base64;
                        }
                    }
                }
            }
        }
    }

I want to load an image and directly encode this to a base64 string. Small/low-res pictures load fast but loading a picture taken by an iPhone 5 for example (2448 x 3264, 2.61 MB) takes ages. Is there a way to load these images faster in my application?
 
Here is my C# code:
 
private void button1_Click(object sender, EventArgs e)
    {
        Stream myStream = null;
        OpenFileDialog openFileDialog1 = new OpenFileDialog();
        //Setup OpenFileDialog

        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {
            if ((myStream = openFileDialog1.OpenFile()) != null)
            {
                using (myStream)
                {
                    string sFileName = openFileDialog1.FileName;
                    textBox1.Text = sFileName;
                    pictureBox1.ImageLocation = sFileName;
                    using (Bitmap bm = new Bitmap(sFileName))
                    {
                        using (var ms = new MemoryStream())
                        {
                            bm.Save(ms, ImageFormat.Jpeg);
                            base64 = Convert.ToBase64String(ms.ToArray());
                            textBox3.Text = base64;
                        }
                    }
                }
            }
        }
    }

原文：https://stackoverflow.com/questions/37990239