Azure Notification Hubs
An Azure service that is used to send push notifications to all major platforms from the cloud or on-premises environments.
320 questions
NotificationHub BadRequest
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(99.2, 99%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EM%3C/text%3E%3C/svg%3E)
Michael
1
Reputation point
When sending Notification message from my WinForms C# application, I get following error:
The remote server returned an error: (400) BadRequest. Reason: Bad Request..TrackingId:4e241fb1-0823-447b-9dfc-edd9312edc23,TimeStamp:2022-02-22T11:14:02.8226408Z
No other explanation. I'm sending thru Azure to FCM > Android Tablet.
using Microsoft.Azure.NotificationHubs
error happens SendDirectNotificationAsync
{count} votes
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sadomovalex 3,631 Reputation points2022-02-22T15:24:06.683+00:00 did you successfully registered device in notification hub (and got valid registration id) before sending a message?
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Michael 1 Reputation point
2022-02-22T17:42:19.47+00:00 Yes I did. I can test send. From a small WinForms app it works. When I use the same code in a big WinForms App with 18 projects, it does not work. Besides the error message, I do not get any further in why it is BadRequest.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(185.6, 59%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
SnehaAgrawal-MSFT 21,586 Reputation points2022-02-25T14:34:43.317+00:00 Could you please see if there is anything in the response body as this includes why the 400 was returned. Let us know to help you better on this.
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sadomovalex 3,631 Reputation points
2022-02-25T15:23:09.227+00:00 try to run small WinForms app (which works) with Fiddler running in background and check what requests was sent from there. After that try the same with your big WinForms app also with Fiddler in background and compare 2 requests: will there be differences? May be you use different nuget packages of SDK in these apps?
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Michael 1 Reputation point
2022-02-28T11:10:39.29+00:00 I have let the two Application running with Fiddler on. Fiddler does record only the first handshake when I get all registration (GetAllRegistrationsAsync). When calling SendDirectNotificationAsync Fiddler does not record anything. No traffic, but the error message is the same:
The remote server returned an error: (400) BadRequest. Reason: Bad Request..TrackingId:4e241fb1-0823-447b-9dfc-edd9312edc23,TimeStamp:2022-02-28T11:14:02.8226408Z
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Michael 1 Reputation point
2022-02-28T11:11:57.967+00:00 There is nothing in the response body. That's why I'm asking here if anyone has an idea.
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sadomovalex 3,631 Reputation points
2022-02-28T15:38:37.573+00:00 just to check: did you enable capturing and decode of https traffic in Options > HTTPS:
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Michael 1 Reputation point
2022-02-28T16:18:41.387+00:00 I had to change to "browser only". If I had it to all processes, my application block totaly.
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