This page explains the advanced features for open channels. Some of them are the premium features available only to a paying user.
If you are using the Custom Plan, you can send an admin message to an open channel using Sendbird Dashboard or Chat Platform API. To send the admin message through your dashboard, on the Chat > Open channels, select an open channel, find a message box below, click the Admin message tab, and then write your message in the box. An admin message is limited to 1,000 characters.
Note: For clients using the Free Plan, a suggesting message to upgrade to the Custom Plan will be returned when attempting to send an admin message using the Chat API.
When creating a channel, you can add a cover image by specifying an image URL or file.
You can fetch the cover image URL using the
CoverUrl property. You can also update a channel's cover image by calling the
When creating an open channel, you can additionally specify a custom channel type to subclassify open channels. This custom type takes on the form of a
String, and can be useful in searching or filtering open channels.
CustomType properties of a channel object allow you to append information to your channels. While both properties can be used flexibly, common examples for the
CustomType include categorizing channels into School or Work.
CustomType property contains the channel's custom type.
When sending a message, you can additionally specify a custom message type to subclassify messages. This custom type takes on the form of a
String, and can be useful in searching or filtering messages.
CustomType properties of a message object allow you to append information to your messages. While both properties can be used flexibly, common examples for the
CustomType include categorizing message groups into Notes or Contacts.
To embed a custom type into your message, pass a
String value as an argument to the parameter in the
CustomType property contains the message's custom type.
You search for specific channels by adding a keyword to your
OpenChannelListQuery instance. There are two types of keywords: a Name and a URL. The code below shows the query instance which returns the list of open channels that partially match the specified Name keyword in their names.
The following shows the query instance which returns a list of open channels that partially match the specified URL keyword in the URLs of the channels.
It is possible for text messages to be sent in different languages through the Sendbird's auto-translation feature. When sending a text message, pass in a
List of language codes to the
SendUserMessage() to request translated messages in the corresponding lguages.
You can obtain translations of a message through the
Translations property. This contains a
Dictionary containing the language codes and translations.
Note: The message auto-translation supports 53 languages. For the language code table, see the Miscellaneous > Supported languages. As this is one of Sendbird's premium features, contact our sales team for further assistance.