Question

我最近开始开发Windows Forms Applications。我正在使用PictureBox，我正面临着一个问题。当我向外导航或者如果我将其最小化并将其打开时，它正在丢失图像，如下图所示。任何帮助是极大的赞赏。

private void button1_Click(object sender, EventArgs e) {
        try {
            using (FileStream fs = new FileStream("C:\\Users\\Public\\Pictures\\Sample Pictures\\Penguins.jpg", FileMode.Open, FileAccess.Read)) {
                using (Image original = Image.FromStream(fs)) {
                    Bitmap image1 = (Bitmap)original;
                    pictureBox1.Image = image1;
                    pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
                    pictureBox1.Refresh();
                }
            }

        }
        catch (System.IO.FileNotFoundException) {
            MessageBox.Show("There was an error opening the bitmap." +
                "Please check the path.");
        }
    }

Forms Application before Navigating

Forms Application after Navigating to another app or minimizing it

Answer 1

这是因为您正在处理图像

using (Image original = ....
{
    Bitmap image1 = (Bitmap)original;
    // ...
}

image1与original的对象相同，只是强制转换为Bitmap，并在屏幕上绘制后立即处理（使用Refresh方法）。

要解决此问题，请使用以下内容

Bitmap image1 = new Bitmap(original);
// ...

PictureBox在导航到不同的应用程序时丢失了它的图像

1 个答案: