Create a message thread

When a user replies to a message in a channel, it creates a message thread, which refers to a collection of messages consisting of a parent message and its replies. Message threading lets users ask questions, give feedback, or add context to a specific message without disrupting the flow of conversation. It can have the following elements.

• A message can have a thread of replies.

• A message that has a thread of replies is a parent message.

• A parent message and its threaded replies are collectively called a message thread.

• Every message within a thread, whether it's parent or reply, is a threaded message.

• A message that doesn't have any replies is an unthreaded message.

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Message threading has the following limitations.

• Only 1-depth threads are supported, meaning you can only add reply messages to non-reply messages. You can't add a reply to a reply message.

• Message threading is limited to text and file messages. You can't send admin messages as replies or add replies to admin messages.

You can reply to a specific message in a channel through the SendUserMessage() or SendFileMessage() method. To do so, you should create a SbUserMessageCreateParams or a SbFileMessageCreateParams object and then specify the ParentMessageId property of the object. Sending reply messages works the same way as sending regular messages to a channel except replies have an additional ParentMessageId property.

When replying to a message through the SendUserMessage() method, you should specify and pass a SbUserMessageCreateParams object to the method as a parameter. The SbUserMessageCreateParams class is derived from the SbBaseMessageCreateParams class and can access all the methods and properties of SbBaseMessageCreateParams.

SbUserMessageCreateParams userMessageCreateParams = new SbUserMessageCreateParams(TEXT_MESSAGE);
userMessageCreateParams.ParentMessageId = PARENT_MESSAGE_ID;

channel.SendUserMessage(userMessageCreateParams, (inMessage, inError) =>
{
    if (inError != null)
        return; //Handle error.

    // A reply to a specific message in the form of a text message is successfully sent.
});

This table only contains properties shown in the code above. To see the comprehensive list of all available methods and properties, see SbUserMessageCreateParams.

When replying with a file message through the SendFileMessage() method, you should specify and pass a SbFileMessageCreateParams object to the method as a parameter. The SbFileMessageCreateParams class is derived from the SbBaseMessageCreateParams class and can access all the methods and properties of SbBaseMessageCreateParams.

SbFileMessageCreateParams fileMessageCreateParams = new SbFileMessageCreateParams(FILE);
fileMessageCreateParams.ParentMessageId = PARENT_MESSAGE_ID;

channel.SendFileMessage(fileMessageCreateParams, inProgressHandler: null, (inMessage, inError) =>
{
    if (inError != null)
        return; //Handle error.

    // A reply to a specific message in the form of a file message is successfully sent.
});

This table only contains properties shown in the code above. To see the comprehensive list of all available methods and properties, see SbFileMessageCreateParams.