Update 12/18: .NET framework
If you're using .NET framework of event hubs as per this doc, it still has the same error message as .NET core of event hubs in my previous answer.
In your posted code:
var eventHubClient = EventHubClient.CreateFromConnectionString(connectionString, eventHubName);
EventHubEvent e = new EventHubEvent() { ... };
eventHubClient.SendAsync(new EventData(Encoding.UTF8.GetBytes(serializer.Serialize(e))));
The reason you cannot see error message when use a incorrect eventhub_name or incorrect SharedAccessKeyName is that when you're using the async method SendAsync, you didn't specify async / await keyword.
If you want to see the error message when using SendAsync method, you should use the following code for testing purpose:
namespace Sender
{
class Program
{
static string eventHubName = "your_eventhub_name";
static string connectionString = "your_namespace_connection_string";
static void Main(string[] args)
{
SendingRandomMessages();
Console.WriteLine("**completed**");
Console.ReadLine();
}
static async void SendingRandomMessages()
{
var eventHubClient = EventHubClient.CreateFromConnectionString(connectionString, eventHubName);
for(int i=0;i<5;i++)
{
try
{
var message = Guid.NewGuid().ToString()+": ddd";
Console.WriteLine("{0} > Sending message: {1}", DateTime.Now, message);
//eventHubClient.Send(new EventData(Encoding.UTF8.GetBytes(message)));
await eventHubClient.SendAsync(new EventData(Encoding.UTF8.GetBytes(message)));
}
catch (Exception exception)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("{0} > Exception: {1}", DateTime.Now, exception.Message);
Console.ResetColor();
}
Thread.Sleep(200);
}
}
}
}
when run this app:
1.Specify a wrong event hub name, you will receive an error: The messaging entity 'sb://your_eventhub_namespace.servicebus.windows.net/your_eventhub_Name' could not be found. Screenshot as below:
2.Specify a wrong SharedAccessKeyName, you will receive an error: InvalidSignature: The token has an invalid signature. Screenshot as below:
12/17: .NET core
The method / dll(Microsoft.ServiceBus.dll) in the link you provided is a legacy one. You should use the new nuget package Microsoft.Azure.EventHubs and it's related method for Azure event hub. For more details of sending / receiving event data, please refer to this official doc.
And if you follow the official doc to send events, then for your question:
eventHubName is wrong
If eventHub name is wrong, when execute SendAsync method, you will receive an error: Exception: Put token failed. status-code: 404, status-description: The messaging entity 'sb://your_eventhub_namespace.servicebus.windows.net/your_eventhub_Name' could not be found.
The screenshot of this error:
connectionString has wrong SharedAccessKeyName
If connectionString has wrong SharedAccessKeyName, when execute SendAsync method, you will receive an error: Exception: Put token failed. status-code: 401, status-description: InvalidSignature: The token has an invalid signature.
The screenshot of this error:
Event hub is otherwise unavailable
If Event hub is otherwise unavailable, for this case, I cannot make an event hub into unavailable status. But I'm sure it will return an error looks like "the event hub is not found." or "the event hub is unavailable."
