Windows应用商店C＃XAML：NavigationHelper LoadState / SaveState单选按钮

Question

前后导航时如何保存单选按钮选择？

对于文本框，我知道是这样的：

private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
    {
        if (e.PageState != null)
        {
            this.text5_input.Text = e.PageState["txtContents"] as string;

        }
    }


 private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)
    {
        e.PageState["txtContents"] = this.text5_input.Text;
    }

但是，当我们对单选按钮使用类似的代码时，会弹出一个错误消息，提示无法将string（e.PageState）转换为bool（单选按钮）。

我如何做到这一点？

Answer 1

您可以使用RadioButtonInstance.IsChecked.ToString并使用bool.Parse（（bool）e.PageState [“ rbState”]）恢复数据

private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
{
    if (e.PageState != null)
    {
        this.text5_input.Text = e.PageState["txtContents"] as string;
        this.RadioButtonInstance.IsChecked = (bool)e.PageState["rbState"];
    }
}

private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)
{
    e.PageState["txtContents"] = this.text5_input.Text;
    e.PageState["rbState"] = this.RadioButtonInstance.IsChecked;
}

从理论上讲这是布尔，您可以尝试吗？