C++/winRT xaml ContentDialog 示例答案

【问题标题】：C++/winRT xaml ContentDialog exampleC++/winRT xaml ContentDialog 示例
【发布时间】：2020-09-02 18:32:41
【问题描述】：

文档显示了这个 C# sn-p：

async void DisplayDeleteFileDialog(){
    ContentDialog deleteFileDialog = new ContentDialog{
        Title = "Delete file permanently?",
        Content = "If you delete this file, you won't be able to recover it. Do you want to delete it?",
        PrimaryButtonText = "Delete",
        CloseButtonText = "Cancel"
    };

    ContentDialogResult result = await deleteFileDialog.ShowAsync();

    // Delete the file if the user clicked the primary button.
    /// Otherwise, do nothing.
    if (result == ContentDialogResult.Primary) {
         // Delete the file.
        }
    else {
         // The user clicked the CLoseButton, pressed ESC, Gamepad B, or the system back button.
         // Do nothing.
        }
    }

我要求的是这个 sn-p 的 C++/winRT 版本。

【问题讨论】：

标签： c++-winrt

【解决方案1】：

IAsyncAction Async()
{
    ContentDialog dialog;
    dialog.Title(box_value(L"title"));
    dialog.Content(box_value(L"content"));
    dialog.PrimaryButtonText(L"primary");
    dialog.CloseButtonText(L"close");

    auto result = co_await dialog.ShowAsync();

    if (result == ContentDialogResult::Primary)
    {

    }
}

【讨论】：

【解决方案2】：

我想在单击按钮时打开内容对话框，所以我尝试了Kenny Kerr 提供的代码 sn-p。一切似乎都正常工作，没有错误，但是当我单击按钮时，没有看到任何对话框。我通过放置下面的代码来修复它

 dialog.XamlRoot(myButton().XamlRoot());

auto result = co_await dialog.ShowAsync() 行之前。

【讨论】：