(C# UWP/WinRT) Azure Service Bus - Send Message to Topic

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Example code showing how to send a message to an Azure Service Bus Topic.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// Note: Requires Chilkat v9.5.0.65 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Make the initial connection.
// A single REST object, once connected, can be used for many Azure Service Bus REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
Chilkat.Rest rest = new Chilkat.Rest();
bool bAutoReconnect = true;
bool success = await rest.ConnectAsync("<yournamespace>.servicebus.windows.net",443,true,bAutoReconnect);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// Let's load a previously computed SAS token and use it.
// See Azure Shared Access Signature for an example to genenerate an Azure SAS token.
Chilkat.StringBuilder sbToken = new Chilkat.StringBuilder();
sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8");

// Tell the REST object to use the Azure Shared Access Signature for authorization.
sbToken.Prepend("SharedAccessSignature ");
rest.AddHeader("Authorization",sbToken.GetAsString());

// ----------------------------------------------------------------------------------------------

// The code for sending to a topic is identical to the code sending to a queue.
// The only difference is that a topic name (or topic path) is used instead of queue name/path.

// Send to a topic named "gilaMonster";
string topicName = "gilaMonster";

// The HTTP request body contains the content of the message sent to the topic.
Chilkat.StringBuilder sbRequestBody = new Chilkat.StringBuilder();
sbRequestBody.Append("Hello, I'm a gila monster!");

// Build the path..
Chilkat.StringBuilder sbPath = new Chilkat.StringBuilder();
sbPath.Append("/");
sbPath.Append(topicName);
sbPath.Append("/messages");

// Add timeout and api-version query parameters.
rest.AddQueryParam("timeout","20");
rest.AddQueryParam("api-version","2013-08");

// Standard brokered message properties are placed in a BrokerProperties HTTP header. 
// The broker properties must be serialized in JSON format. To specify a TimeToLive value of 3600 seconds 
// and to add a message label "M1" to the message..
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.AppendInt("TimeToLive",3600);
json.AppendString("Label","A123");
rest.AddHeader("BrokerProperties",json.Emit());

// To add custom properties, such as "Priority" and "Color"
rest.AddHeader("Priority","High");
rest.AddHeader("Color","pink");

Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
success = await rest.FullRequestSbAsync("POST",sbPath.GetAsString(),sbRequestBody,sbResponseBody);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

Debug.WriteLine("Response Status Code = " + Convert.ToString(rest.ResponseStatusCode));

// Check for a success response.
if (rest.ResponseStatusCode != 201) {
    Debug.WriteLine(rest.LastRequestStartLine);
    Debug.WriteLine(rest.LastRequestHeader);
    Debug.WriteLine(sbResponseBody.GetAsString());
    Debug.WriteLine("Failed.");
    return;
}

// If successful, the 201 response will have no response body.

Debug.WriteLine("Success.");