我从我看到的一个例子中做到了这一点,它从未抛出任何错误,但图像显示为灰色。
有更好的方法吗?
private unsafe void menuItem7_Click(object sender, EventArgs e)
{
var settings = Utility.GatherLocalSettings();
openFileDialog1.InitialDirectory = settings.SavePath;
openFileDialog1.Filter = "Scan Files (*.jpg)|*.jpg";
openFileDialog1.FilterIndex = 1;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
byte[] openFile = File.ReadAllBytes(openFileDialog1.FileName);
fixed (byte* p = openFile)
{
IntPtr img = (IntPtr)p;
frmContainer newScan = new frmContainer(img);
newScan.MdiParent = this;
newScan.Text = Path.GetFileName(openFileDialog1.FileName) + " [Saved]";
newScan.Show();
}
}
}
PS:我检查了csproj以允许构建中的不安全代码。
答案 0 :(得分:5)
试试这个,
IntPtr pval = IntPtr.Zero;
System.Drawing.Imaging.BitmapData bd = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
try
{
pval=bd.Scan0;
...
}
finally
{
bmp.UnlockBits(bd);
}
答案 1 :(得分:2)
如果我理解正确,您正在尝试加载.bmp文件。为此,请使用Image.FromFile()。然后,你可以用它做任何你想做的事。