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How to dynamically Configure different "SubscriptionProperties" for Azure ServiceSub Subscription in C#

I'm trying to configure Azure ServiceBus Topic Subscription dynamically(using C#) with all of its properties which we can set up using Azure Portal.
I have tried the below code, but it's giving me an "object reference error" for SubscriptionProperties while setting up its values.
static SubscriptionProperties subscriptionProperties;
static async Task Main(string[] args)
{
adminClient = new ServiceBusAdministrationClient(connectionString);
client = new ServiceBusClient(connectionString);
subscriptionProperties.AutoDeleteOnIdle = TimeSpan.FromDays(14);
subscriptionProperties.DefaultMessageTimeToLive = TimeSpan.FromDays(14);
subscriptionProperties.TopicName = topicName;
subscriptionProperties.SubscriptionName = subscriptionName;
subscriptionProperties.MaxDeliveryCount = 3;
subscriptionProperties.LockDuration = TimeSpan.FromSeconds(5.00);
subscriptionProperties.DeadLetteringOnMessageExpiration = true;
subscriptionProperties.EnableDeadLetteringOnFilterEvaluationExceptions = true;
Console.WriteLine($"Creating the subscription {subscriptionName} with a correlation filter");
if (!await adminClient.SubscriptionExistsAsync(topicName, subscriptionName))
{
await adminClient.CreateSubscriptionAsync(
new CreateSubscriptionOptions(subscriptionProperties),
new CreateRuleOptions(subscriptionFilterName, new CorrelationRuleFilter() { Subject = correlationFilterValue }));
}
}
Let me know if this is the correct way of setting the property values for "SubscriptionProperties" class or how can I do so?

I was able to fix this issue by following this link https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/servicebus/Azure.Messaging.ServiceBus/samples/Sample07_CrudOperations.md#create-a-topic-and-subscription
var client = new ServiceBusAdministrationClient(connectionString);
string subscriptionName = "<subscription_name>";
var subscriptionOptions = new CreateSubscriptionOptions(topicName, subscriptionName)
{
AutoDeleteOnIdle = TimeSpan.FromDays(7),
DefaultMessageTimeToLive = TimeSpan.FromDays(2),
EnableBatchedOperations = true,
UserMetadata = "some metadata"
};
SubscriptionProperties createdSubscription = await client.CreateSubscriptionAsync(subscriptionOptions);
This might be helpful for other readers as well as having similar doubuts.

Can ZXing can read multiple barcode in the single image using C#?

I am trying to read multiple barcodes in a jpg image using the ZXing library. But it's returning only one barcode. I am not getting any source on how I can modify my code so that it read multiple barcodes. My code is:
private string readPDFBarcode(String fname) {
IBarcodeReader reader = new BarcodeReader()
{
AutoRotate = true,
TryInverted = true,
Options = new DecodingOptions
{
TryHarder = true,
PureBarcode = false,
ReturnCodabarStartEnd = true,
PossibleFormats = new List<BarcodeFormat> { BarcodeFormat.CODE_128, BarcodeFormat.CODE_39, BarcodeFormat.UPC_E }
}
};
Bitmap oBitmap = new Bitmap(fname);
var result = reader.Decode(oBitmap);
if (result != null)
{
return result.ToString();
}
else {
return "";
}
}
Any suggestions will be of great help. Thank you!

Try this one:
var results = reader.DecodeMultiple(oBitmap);
If it isn't available in your environment, please give some information about the target .net framework (classic or core).

Making DialogFlow v2 DetectIntent Calls w/ C# (including input context)

So I finally figured out a way to successfully make detect intent calls and provide an input context. My question is whether or not this is the CORRECT (or best) way to do it:
(And yes, I know you can just call DetectIntent(agent, session, query) but I have to provide a input context(s) depending on the request)
var query = new QueryInput
{
Text = new TextInput
{
Text = model.Content,
LanguageCode = string.IsNullOrEmpty(model.Language) ? "en-us" : model.Language,
}
};
var commonContext = new global::Google.Cloud.Dialogflow.V2.Context
{
ContextName = new ContextName(agent, model.sessionId, "my-input-context-data"),
LifespanCount = 3,
Parameters = new Struct
{
Fields = {
{ "Source", Value.ForString(model.Source) },
{ "UserId" , Value.ForString(model.UserId.ToString())},
{ "Name" , Value.ForString(model.FirstName)}
}
}
};
var request = new DetectIntentRequest
{
SessionAsSessionName = new SessionName(agent, model.sessionId),
QueryParams = new QueryParameters
{
GeoLocation = new LatLng {Latitude = model.Latitude, Longitude = model.Longitude},
TimeZone = model.TimeZone ?? "MST"
},
QueryInput = query
};
request.QueryParams.Contexts.Add(commonContext);
// ------------
var creds = GetGoogleCredentials("myCredentials.json");
var channel = new Grpc.Core.Channel(SessionsClient.DefaultEndpoint.Host, creds.ToChannelCredentials());
var client = SessionsClient.Create(channel);
var response = client.DetectIntent(request);
channel.ShutdownAsync();
return response;
Note: I included the explicit ShutDownAsync (it's not in an async call) because I was getting some file locking issues when attempting to re-deploy the WebAPI project (and only after having executed this code).
Thanks
Chris
Updated 4/25: The most basic way I use this is to integrate the user's name into intent responses:
It can also be read from within the webhook/inline fulfillment index.js:
const name = request.body.queryResult && request.body.queryResult.outputContexts && request.body.queryResult.outputContexts[0].parameters.Name

RabbitMQ exception case data

I am new at RabbitMQ and doing first application. But I am confused a bit about exception stuations. For example I get a message from Queue. And an error occured while saving data to database. The data wil be lose. What is the solution of this problem?
var factory = new ConnectionFactory { HostName = "10.1.2.34" };
using (var connection = factory.CreateConnection())
{
using (var channel = connection.CreateModel())
{
channel.QueueDeclare(queue: "business.orders", durable: false, exclusive: false, autoDelete: false, arguments: null);
var data = channel.BasicGet(queue: "business.orders", noAck: true);
using (var stream = new MemoryStream(data.Body))
{
var order = (PlaceOrder)new BinaryFormatter().Deserialize(stream);
// Throw exception. ????
}
}
}

you have to use the manual ack:
var data = channel.BasicGet(queue: "business.orders", noAck: false);
insert into DB, if you don't have errors:
channel.BasicAck(result.DeliveryTag, false);
Please read here: https://www.rabbitmq.com/dotnet-api-guide.html
bool noAck = false;
BasicGetResult result = channel.BasicGet(queueName, noAck);
if (result == null) {
// No message available at this time.
} else {
IBasicProperties props = result.BasicProperties;
byte[] body = result.Body;
...
Since noAck = false above, you must also call IModel.BasicAck to acknowledge that you have successfully received and processed the message:
...
// acknowledge receipt of the message
channel.BasicAck(result.DeliveryTag, false);
}
btw I suggest to read also: https://www.rabbitmq.com/dotnet-api-guide.html section:
Retrieving Messages By Subscription ("push API")
The basicGet is slower respect to the EventingBasicConsumer

PCAP.net RAW DNS query not giving any response

I have create a DNS request using C# and PCAP. I checked the request using the wireshark. but there are not response.
I have compared DNS request which have a response. The flags and DNS query values are same.
I cant figure out why the dns resolver is not sending the response. Please help me.
Thank you.
My packet generating method:
private Packet getPacket(string s, string d,string domain)
{
Random r = new Random();
EthernetLayer ethernetLayer =
new EthernetLayer
{
Source = new MacAddress("00:0C:29:E5:FA:36"),
Destination = new MacAddress("00:0c:29:e5:fa:36"),
EtherType = EthernetType.None, // Will be filled automatically.
};
IpV4Layer ipV4Layer =
new IpV4Layer
{
Source = new IpV4Address(s),
CurrentDestination = new IpV4Address(d),
Fragmentation = IpV4Fragmentation.None,
HeaderChecksum = null, // Will be filled automatically.
Identification = 123,
Options = IpV4Options.None,
Protocol = null, // Will be filled automatically.
Ttl = 100,
TypeOfService = 0,
};
UdpLayer udpLayer =
new UdpLayer
{
SourcePort =ushort.MaxValue,
DestinationPort = 53,
Checksum = null, // Will be filled automatically.
CalculateChecksumValue = true,
};
DnsLayer dnsLayer =
new DnsLayer
{
Id = ushort.Parse(r.Next(0,99999).ToString()),
IsResponse = false,
OpCode = DnsOpCode.Query,
IsAuthoritativeAnswer = false,
IsTruncated = false,
IsRecursionDesired = true,
IsRecursionAvailable = false,
FutureUse = false,
IsAuthenticData = false,
IsCheckingDisabled = false,
ResponseCode = DnsResponseCode.NoError,
Queries = new[]
{
new DnsQueryResourceRecord(new DnsDomainName("col.stc.s-msn.com"),
DnsType.A,
DnsClass.Internet),
},
Answers = null,
Authorities = null,
Additionals = null,
DomainNameCompressionMode = DnsDomainNameCompressionMode.All,
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, ipV4Layer, udpLayer, dnsLayer);
return builder.Build(DateTime.Now);
}
}
This is my packet sending function:
private static void performRequest(LivePacketDevice device)
{
using (PacketCommunicator communicator = device.Open(100,PacketDeviceOpenAttributes.Promiscuous,1000))
{
for (int i = 0; i < threadCount; i++)
{
Thread requester= new Thread(() =>
{
try
{
Program p = new Program();
Random r = new Random();
string resolve = resolvers[r.Next(0, resolvers.Count-1)].ToString();
communicator.SendPacket(p.getPacket(destinationIP.ToString(), resolve, domainName));
p = null;
r = null;
}
catch (Exception ex) { Console.WriteLine(ex.Message); }
});
requester.Start();
Thread.Sleep(1000);
}
}
}

I checked your "getPacket" method but have not found obvious problem, so I just tried it, of course, changed mac addresses and IP addresses, I did get response.
But your packet sending method seems wrong, what is the "DestinationIP", it should source IP, in other words, local IP address of the selected device.