在MFC中，这样为何m_img获取不到任何东西？

Question

void CChildView::OnOpen()
{
//TODO: 在此添加命令处理程序代码
CFileDialog fileDlg(TRUE);

fileDlg.DoModal();

if (fileDlg.GetFileName() != "")
{
    m_img = Image::FromFile(fileDlg.GetFileName());

}

}
void CChildView::Render(CPaintDC &dc)
{
using namespace Gdiplus;

Graphics graphics(dc.GetSafeHdc());

graphics.Clear(Color(255, 0, 0, 0));
//m_img = Image::FromFile(_T("F:\\百度云\\合金弹头.png"));
if (m_img == 0)
{
    SolidBrush blueBrush(Color(255, 0, 0, 255));
    graphics.FillRectangle(&blueBrush, 50, 50, 100, 100);
}
else
    graphics.DrawImage(m_img, 0, 0,m_img->GetWidth(),m_img->GetWidth());

}

Answer 1

m_img = Image::FromFile(L("F:\百度云\合金弹头.png"));
这样呢？

graphics.DrawImage(m_img, 0, 0,m_img->GetWidth(),m_img->GetWidth());，后面的那个是GetWidth