上传图片到winform中,图片消失
程序:通过点击按钮,上传本地图片到winform中显示,可以显示,但只要打开其他windows窗口,图片就消失了。具体代码如下,请高手答疑。
private: System::Void 选择button3_Click(System::Object^ sender, System::EventArgs^ e) {
this->openFileDialog1->ShowDialog();
Image^ image=gcnew Bitmap(openFileDialog1->FileName);
Image^ pThumbnail = image->GetThumbnailImage(50, 50, nullptr, System::IntPtr::Zero);
this->CreateGraphics()->DrawImage(pThumbnail,218,230,pThumbnail->Width,pThumbnail->Height);
delete pThumbnail;
}