看下面的代码
namespace WindowsFormsApplication1
{
public partial class myprogram : Form
{
public myprogram()
{
InitializeComponent();
}
WebKitBrowser wb1 = new WebKitBrowser();
private void timer1_Tick(object sender, EventArgs e)
{
timer1.Enabled = false;
wb1.Navigate("site.com");
timer2.Enabled = true;
}
private void timer2_Tick(object sender, EventArgs e)
{
timer2.Enabled = false;
wb1=null;
timer1.Enabled = true;
}
}
}
要每次清空 RAM,wb1 必须为空。但随后它变为空,不再命中并说它已经为空。那么如何在 timer2 中获取 null 然后在 timer1 中导航?