在我的 UWP 应用程序中,我显示了一个带有少量 TextBox
的 ContentDialog
并根据用户输入执行一些操作。我想要做的是这样的:
ContentDialogResult result = await LoginDialog.ShowAsync();
//Nothing else should be executed before the below method finishes executing
//other code
//....
//....
private void DialogPrimaryButton_ClickAsync(object sender, RoutedEventArgs e)
{
SomethingSynchronous();
}
我是一个新手,无法正确理解 async-await,发生的事情是该行之后的代码
ContentDialogResult result = await LoginDialog.ShowAsync();
在用户单击对话框的主要或次要按钮之前继续执行。我只想在用户与对话框交互后继续。
最佳答案
方法一
private async void DialogPrimaryButton_ClickAsync(object sender, RoutedEventArgs e)
{
await DisplayContentDialog();
}
private async Task DisplayContentDialog()
{
ContentDialogResult result = await LoginDialog.ShowAsync();
//For Primary, Secondary and Cancel Buttons inside the ContentDialog
if (result == ContentDialogResult.Primary)
{
OutputText.Text = "Primary";
// User Pressed Primary key
}
else if (result == ContentDialogResult.Secondary)
{
OutputText.Text = "Secondary";
// User Pressed Secondary key
}
else
{
OutputText.Text = "Cancel";
// User pressed Cancel, ESC, or the back arrow.
}
}
//For custom Buttons inside the ContentDialog
//Use Button Click event for the custom Buttons inside the ContentDialog
private void XAMLButton_Click(object sender, RoutedEventArgs e)
{
OutputText.Text = "XAML Button";
LoginDialog.Hide();
}
方法二
private async void DialogPrimaryButton_ClickAsync(object sender, RoutedEventArgs e)
{
await DisplayContentDialog();
}
private async Task DisplayContentDialog()
{
XAMLButton.Click += XAMLButton_Click;
LoginDialog.PrimaryButtonClick += LoginDialog_PrimaryButtonClick;
LoginDialog.SecondaryButtonClick += LoginDialog_SecondaryButtonClick;
LoginDialog.CloseButtonClick += LoginDialog_CloseButtonClick;
await LoginDialog.ShowAsync();
}
//For Primary Button inside the ContentDialog
private void LoginDialog_PrimaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
{
OutputText.Text = "Primary";
}
//For Secondary Button inside the ContentDialog
private void LoginDialog_SecondaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
{
OutputText.Text = "Secondary";
}
//For Cancel Buttons inside the ContentDialog
private void LoginDialog_CloseButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
{
OutputText.Text = "Cancel";
}
//For custom Buttons inside the ContentDialog
private void XAMLButton_Click(object sender, RoutedEventArgs e)
{
OutputText.Text = "XAML Button";
LoginDialog.Hide();
}
从 Asynchronous programming 了解异步等待和 Call asynchronous APIs in C#文档
关于c# - UWP 等待用户与 ContentDialog 交互,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44574052/