如何在Picturebox中自动显示扫描图像？

Question

我需要在扫描后自动将图片上传到PictureBox。

这是PictureBox的名称PictureBox ptbImgDocEmp

这是扫描仪类

Scanner.cs

 public class Scanner
 {
    Device oDevice;
    Item oItem;
    CommonDialogClass dlg;
    public Scanner()
    {
        dlg = new CommonDialogClass();
        try
        {
            oDevice = dlg.ShowSelectDevice(WiaDeviceType.ScannerDeviceType, true, false);
        }

        catch (Exception Exp)
        { MessageBox.Show("printer not detected");}

    }

这是一个扫描仪按钮

private void btnSca_Click(object sender, EventArgs e)
    {
        Scanner oScanner = new Scanner();
        oScanner.Scann();

        SaveFileDialog saveFileDialog = new SaveFileDialog();
        saveFileDialog.FileName = "test.jpg";
        saveFileDialog.Filter = "jpg files (*.jpg)|*.jpg|All files (*.*)|*.*";
        if (saveFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {
            ptbImgDocEmp.Image = Image.FromFile(saveFileDialog.FileName);
            ptbImgDocEmp.Refresh();
        }
    }