Microsoft-ui-xaml: Guide set but notification not work
Hi there,
We have tried to add https://docs.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/send-local-toast.
Our Notification.cs :
using Windows.UI.Notifications;
using Microsoft.Toolkit.Uwp.Notifications; // Notifications library
using Microsoft.QueryStringDotNET; // QueryString.NET
namespace LaraveX
{
// https://docs.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/send-local-toast
class Notification
{
static ToastVisual visual { get; set; }
static ToastActionsCustom actions { get; set; }
static ToastContent toastContent { get; set; }
static int conversationId { get; set; }
static string image { get; set; }
static string logo { get; set; }
public static void send(string title, string content, string icon = null)
{
LoadVisual(title, content, icon); LoadActions(); LoadContent();
// And create the toast notification
var toast = new ToastNotification(toastContent.GetXml());
ToastNotificationManager.CreateToastNotifier().Show(toast);
}
static void LoadVisual(string title, string content, string icon = null)
{
// In a real app, these would be initialized with actual data
image = "http://www.laravex.com/assets/images/72ppi/logo.png";
logo = Sys.DIR + @"/logo.png";
// Construct the visuals of the toast
visual = new ToastVisual()
{
BindingGeneric = new ToastBindingGeneric()
{
Children =
{
new AdaptiveText()
{
Text = title
},
new AdaptiveText()
{
Text = content
},
new AdaptiveImage()
{
Source = image
}
},
AppLogoOverride = new ToastGenericAppLogo()
{
Source = logo,
HintCrop = ToastGenericAppLogoCrop.Circle
}
}
};
}
static void LoadActions()
{
// In a real app, these would be initialized with actual data
conversationId = 384928;
// Construct the actions for the toast (inputs and buttons)
ToastActionsCustom actions = new ToastActionsCustom()
{
Inputs =
{
new ToastTextBox("tbReply")
{
PlaceholderContent = "Type a response"
}
},
Buttons =
{
new ToastButton("Reply", new QueryString()
{
{ "action", "reply" },
{ "conversationId", conversationId.ToString() }
}.ToString())
{
ActivationType = ToastActivationType.Background,
ImageUri = Sys.DIR + @"/logo.png",
// Reference the text box's ID in order to
// place this button next to the text box
TextBoxId = "tbReply"
},
new ToastButton("Like", new QueryString()
{
{ "action", "like" },
{ "conversationId", conversationId.ToString() }
}.ToString())
{
ActivationType = ToastActivationType.Background
},
new ToastButton("View", new QueryString()
{
{ "action", "viewImage" },
{ "imageUrl", image }
}.ToString())
}
};
}
static void LoadContent()
{
// Now we can construct the final toast content
ToastContent toastContent = new ToastContent()
{
Visual = visual,
Actions = actions,
// Arguments when the user taps body of toast
Launch = new QueryString()
{
{ "action", "viewConversation" },
{ "conversationId", conversationId.ToString() }
}.ToString()
};
// And create the toast notification
var toast = new ToastNotification(toastContent.GetXml());
toast.ExpirationTime = System.DateTime.Now.AddDays(2);
toast.Tag = "18365";
toast.Group = "wallPosts";
}
}
}
The system not work and return System.NullReferenceException: 'Object reference not set to an instance of an object.'
We want send local notify to windows user, u can help ? 🙌
MwSpaceLLC
All 11 comments
Your LoadContent method is setting the value of a local variable named toastContent. Not the value of the Static varible. Deleting the Type in order to set the Static variable should resolve the issue.
StephenLPeters
on 15 Jun 2020
@StephenLPeters Today we have tryed
but the error remain. We have see on the official guide but we cant resolve with this method for send notification
MwSpaceLLC
on 16 Jun 2020
Complete Class :
using Windows.UI.Notifications;
using Microsoft.Toolkit.Uwp.Notifications; // Notifications library
using Microsoft.QueryStringDotNET; // QueryString.NET
namespace LaraveX
{
// https://docs.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/send-local-toast
class Notification
{
static ToastVisual visual { get; set; }
static ToastActionsCustom actions { get; set; }
static ToastContent toastContent { get; set; }
static ToastNotification toast { get; set; }
static int conversationId { get; set; }
static string image { get; set; }
static string logo { get; set; }
public static void send(string title, string content, string icon = null)
{
LoadVisual(title, content, icon); LoadActions(); LoadContent();
toast = new ToastNotification(toastContent.GetXml());
toast.ExpirationTime = System.DateTime.Now.AddDays(2);
toast.Tag = "18365";
toast.Group = "wallPosts";
// And create the toast notification
ToastNotificationManager.CreateToastNotifier().Show(toast);
}
static void LoadVisual(string title, string content, string icon = null)
{
// In a real app, these would be initialized with actual data
image = "http://www.laravex.com/assets/images/72ppi/logo.png";
logo = Sys.DIR + @"/logo.png";
// Construct the visuals of the toast
visual = new ToastVisual()
{
BindingGeneric = new ToastBindingGeneric()
{
Children =
{
new AdaptiveText()
{
Text = title
},
new AdaptiveText()
{
Text = content
},
new AdaptiveImage()
{
Source = image
}
},
AppLogoOverride = new ToastGenericAppLogo()
{
Source = logo,
HintCrop = ToastGenericAppLogoCrop.Circle
}
}
};
}
static void LoadActions()
{
// In a real app, these would be initialized with actual data
conversationId = 384928;
// Construct the actions for the toast (inputs and buttons)
actions = new ToastActionsCustom()
{
Inputs =
{
new ToastTextBox("tbReply")
{
PlaceholderContent = "Type a response"
}
},
Buttons =
{
new ToastButton("Reply", new QueryString()
{
{ "action", "reply" },
{ "conversationId", conversationId.ToString() }
}.ToString())
{
ActivationType = ToastActivationType.Background,
ImageUri = Sys.DIR + @"/logo.png",
// Reference the text box's ID in order to
// place this button next to the text box
TextBoxId = "tbReply"
},
new ToastButton("Like", new QueryString()
{
{ "action", "like" },
{ "conversationId", conversationId.ToString() }
}.ToString())
{
ActivationType = ToastActivationType.Background
},
new ToastButton("View", new QueryString()
{
{ "action", "viewImage" },
{ "imageUrl", image }
}.ToString())
}
};
}
static void LoadContent()
{
// Now we can construct the final toast content
toastContent = new ToastContent()
{
Visual = visual,
Actions = actions,
// Arguments when the user taps body of toast
Launch = new QueryString()
{
{ "action", "viewConversation" },
{ "conversationId", conversationId.ToString() }
}.ToString()
};
}
}
}
System.Exception: 'Cannot find item. (0x80070490)'
MwSpaceLLC
on 16 Jun 2020
@MwSpaceLLC There is also the Microsoft Q&A platform where you can ask this question (I'm not sure if this is a question specifically for the WinUI team to look at as of now) in case you won't get timely replies here (as the team is busy with WinUI 3). Microsoft Q&A is also checked by Microsoft employees who will be more than happy to help you out if they can.
Felix-Dev
on 16 Jun 2020
@jonwis Do you know the right place to route this issue?
StephenLPeters
on 16 Jun 2020
@tfennel might know
jonwis
on 17 Jun 2020
Try to provide an applicationId in CreateToastNotifier(). Hopefully this solves the issue.
https://stackoverflow.com/questions/32214716/showing-a-windows-10-toast-notification
greg-woo
on 18 Jun 2020
Thanks for reply,
@greg-woo
@jonwis
@StephenLPeters
@Felix-Dev
Now the error not see, but our notification not appaer.
We also tried another class for test xml content but again NOT SEE TOAST:
using System;
using Windows.Data.Xml.Dom;
using Windows.UI.Notifications;
using System.Collections.Generic;
namespace LaraveX
{
class Notify
{
public Notify(string title, string content)
{
// In a real app, these would be initialized with actual data
string logo = Sys.DIR + @"/logo.png";
// TODO: all values need to be XML escaped
// Construct the visuals of the toast
string toastVisual =
$@"<visual>
<binding template='ToastGeneric'>
<text>{title}</text>
<text>{content}</text>
<image src='{logo}' placement='appLogoOverride' hint-crop='circle'/>
</binding>
</visual>";
// TODO: all args need to be XML escaped
string toastXmlString =
$@"<toast>
{toastVisual}
</toast>";
// Parse to XML
XmlDocument toastXml = new XmlDocument();
toastXml.LoadXml(toastXmlString);
// Generate toast
var toast = new ToastNotification(toastXml);
// And create the toast notification
ToastNotificationManager.CreateToastNotifier("LaraveX").Show(toast);
}
}
}
We tried to see notification in status, but is empry:
MwSpaceLLC
on 18 Jun 2020
I would suggest looking at the following code samples to see if they work. Let me know if they run properly on your machine.
https://docs.microsoft.com/en-us/samples/microsoft/windows-classic-samples/desktop-toasts/
https://docs.microsoft.com/en-us/samples/microsoft/windows-universal-samples/notifications/
greg-woo
on 23 Jun 2020
@greg-woo thanks for reply,
one of this code simple work fine. Our team must include this in our project.
MwSpaceLLC
on 23 Jun 2020
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