Question

如何在前后导航时保存单选按钮选择？

对于文本框，我知道它是这样的：

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;
    }

然而，当我们使用类似的单选代码按钮时，会弹出一个错误，指出无法将字符串（e.PageState）转换为bool（单选按钮）。

我该如何实现？

Answer 1

您可以使用RadioButtonInstance.IsChecked.ToString并恢复数据使用bool.Parse（（bool）e.PageState [＆＃34; rbState＆＃34;]）

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;
}

理论上这是为了布尔，你能试试吗？

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

1 个答案: