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如何在vc ++中将'System :: String ^'转换为'const char*'？

我的代码:

String ^Result1= "C:/Users/Dev/Desktop/imag.jpg";

IplImage *img1 = cvLoadImage(Result1, 1);

如果我喜欢上面它会产生以下错误.

error C2664: 'cvLoadImage' : cannot convert parameter 1 from 'System::String ^' to 'const char *'

请帮我.

如何将'String ^'转换为'const char*'？

     String^ cr = ("netsh wlan set hostednetwork mode=allow ssid=" + this->txtSSID->Text + " key=" + this->txtPASS->Text);
system(cr);

错误:

1   IntelliSense: argument of type "System::String ^" is incompatible with parameter of type "const char *"