CreateHostApplication Method

Creates a new Sparkplug host application with the specified host ID and adds it to the Sparkplug system.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<JetBrains.Annotations.NotNullAttribute()>
Public Function CreateHostApplication( _
   ByVal hostId As String _
) As EasySparkplugHostApplication

'Usage
 
Dim instance As EasySparkplugSystem
Dim hostId As String
Dim value As EasySparkplugHostApplication
 
value = instance.CreateHostApplication(hostId)

[JetBrains.Annotations.NotNull()]
public EasySparkplugHostApplication CreateHostApplication( 
   string hostId
)

[JetBrains.Annotations.NotNull()]
public:
EasySparkplugHostApplication^ CreateHostApplication( 
   String^ hostId
)

Parameters

hostId

The Sparkplug host ID.

The value represents a Sparkplug host ID. It must be a string with valid UTF-8 characters except for the reserved characters of '+' (plus) and '#' (number sign).

The value of this parameter cannot be null (Nothing in Visual Basic).

Return Value

Returns the created Sparkplug host application.

This method never returns null (Nothing in Visual Basic).

Exceptions

Exception Description

Exception	Description
System.ArgumentException	One of the arguments provided to a method is not valid. This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.
System.ArgumentNullException	A `null` reference (`Nothing` in Visual Basic) is passed to a method that does not accept it as a valid argument. This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

System.ArgumentException

One of the arguments provided to a method is not valid.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

System.ArgumentNullException

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

If the host application with hostId already exists in the Sparkplug system, this method throws an System.ArgumentException.

Sparkplug is a trademark of Eclipse Foundation, Inc. "MQTT" is a trademark of the OASIS Open standards consortium. Other related terms are trademarks of their respective owners. Any use of these terms on this site is for descriptive purposes only and does not imply any sponsorship, endorsement or affiliation.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

Reference

EasySparkplugSystem Class
EasySparkplugSystem Members
DestroyHostApplication Method

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