Xaml CloseButtonText providing InvalidCastException
I have a basic UAP app to run on a Windows 10 Mobile Enterprise device. However, when I try to open even the simplest of ContentDialogs, I get InvalidCastException when I try to set it CloseButtonText
using Windows.UI.Xaml.Controls;
...
private async void DisplayNoWifiDialog()
{
ContentDialog noWifiDialog = new ContentDialog {
Title = "No wifi connection",
Content = "Check your connection and try again.",
CloseButtonText = "Ok"
};
ContentDialogResult result = await noWifiDialog.ShowAsync();
}
Unable to create object of type 'Windows.UI.Xaml.Controls.ContentDialog' for input 'Windows.UI.Xaml.Controls.IContentDialog2'.
System.InvalidCastException: The specified listing is not valid. at System.StubHelpers.StubHelpers.GetCOMIPFromRCW_WinRT (Object objSrc, IntPtr pCPCMD, IntPtr & ppTarget) at Windows.UI.Xaml.Controls.ContentDialog.put_CloseoveButtonText (StringMain.disc.) stack from the previous location where the exception was thrown - at System.Runtime.CompilerServices.AsyncMethodBuilderCore <. > C.b__6_0 (State Object) in System.Threading.WinRTSynchronizationContext.Invoker.InvokeCore ()
Win 10 minimum and target platforms are set to 10240 and 15063 respectively. CloseButtonText was introduced in 1703.
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try it
var dialog = new ContentDialog() {
Title = "No wifi connection",
//RequestedTheme = ElementTheme.Dark,
//FullSizeDesired = true,
MaxWidth = this.ActualWidth // Required for Mobile!
};
panel.Children.Add(new TextBlock {
Text = "Check your connection and try again." ,
TextWrapping = TextWrapping.Wrap,
});
// a check box for example
var cb = new CheckBox {
Content = "Don't show this dialog again"
};
panel.Children.Add(cb);
dialog.Content = panel;
// Add Buttons
dialog.PrimaryButtonText = "OK";
dialog.PrimaryButtonClick += delegate {
// do something
};
// Show Dialog
var result = await dialog.ShowAsync();
Or using MessageDialog
var dialog = new Windows.UI.Popups.MessageDialog(
"Check your connection and try again." ,
"No wifi connection");
dialog.Commands.Add(new Windows.UI.Popups.UICommand("Ok") { Id = 0 });
// add another button if you want to
//dialog.Commands.Add(new Windows.UI.Popups.UICommand("Cancel") { Id = 1 });
// example: check mobile and add another button
if (Windows.System.Profile.AnalyticsInfo.VersionInfo.DeviceFamily != "Windows.Mobile")
{
// Adding a 3rd command will crash the app when running on Mobile !!!
//dialog.Commands.Add(new Windows.UI.Popups.UICommand("Maybe later") { Id = 2 });
}
dialog.DefaultCommandIndex = 0;
//dialog.CancelCommandIndex = 1;
var result = await dialog.ShowAsync();
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Just use SecondaryButtonText
instead CloseButtonText
.
Or go to Project Properties
and set the Min version in the Application tab to Windows 10 Creators Update (10.0; Build 15063)
. But this will make the app unavailable for older versions of Windows 10.
PS I would appreciate it if Microsoft starts thinking about adding a compile-time check for such cases instead of throwing a completely obscure exception at runtime.
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Works on Windows 10
I got this SO question after successfully running the following code on a Win10 window:
private async void DisplayToggleDialog()
{
ContentDialog toggleDialog = new ContentDialog
{
Title = "You've Toggled the Item",
Content = "The Item is On",
CloseButtonText = "Ok"
};
ContentDialogResult result = await toggleDialog.ShowAsync();
}
Server 2016 crash
Then I built and ran the code on Server 2016 running Visual Studio 2017 v15.5.0 Preview 4.0 and when ContentDialog gets an instance I get the following error:
I changed the code to use PrimaryButtonText instead of CloseButtonText (which seems to be no longer defined under UWP) and it worked.
private async void DisplayToggleDialog()
{
ContentDialog toggleDialog = new ContentDialog
{
Title = "You've Toggled the Item",
Content = "The Item is On",
PrimaryButtonText = "Ok"
};
ContentDialogResult result = await toggleDialog.ShowAsync();
}
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