Metadata API for PubNub C# SDK

This page describes the new Objects v2. To upgrade from Objects v1, refer to the migration guide.

Objects provides easy-to-use, serverless storage for user and channel data you need to build innovative, reliable, scalable applications. Use Objects to easily store metadata about your application users and channels, and their membership associations, without the need to stand up your own databases.

PubNub also triggers events when object data is set or removed from the database. Clients can receive these events in real time and update their front-end application accordingly.

User

Get Metadata for All Users

Description

Returns a paginated list of UUID Metadata objects, optionally including the custom data object for each.

Method(s)

To Get All UUID Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.GetAllUuidMetadata().IncludeCustom(bool).IncludeCount(bool).Page(PNPageObject).Sort(List<string>).Filter(string).Limit(int)
   

   Parameter	Type	Required	Description
   IncludeCustom	bool	Optional	Whether to fetch Custom fields or not.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.
   Filter	string	Optional	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here.
   Limit	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.

Basic Usage

PNResult<PNGetAllUuidMetadataResult> getAllUuidMetadataResponse = await pubnub.GetAllUuidMetadata()
    .IncludeCustom(true)
    .IncludeCount(true)
    .ExecuteAsync();

PNGetAllUuidMetadataResult getAllUuidMetadataResult = getAllUuidMetadataResponse.Result;
PNStatus status = getAllUuidMetadataResponse.Status;

Response

{
    "Uuids": [
        {
            "Uuid": "uuid-1",
            "Name": "John Doe",
            "Email": "jack@twitter.com",
            "ExternalId": null,
            "ProfileUrl": null,
            "Custom": null,
            "Updated": "2020-06-17T16:28:14.060718Z"
        },
        {
            "Uuid": "uuid-2",
            "Name": "Bob Cat",
            "Email": "bobc@example.com",
            "ExternalId": null,
            "ProfileUrl": null,
            "Custom": {
                "phone": "999-999-9999"
            },
            "Updated": "2020-06-17T16:42:22.906768Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MTI",
        "Prev": ""
    }
}

Get User Metadata

Description

Returns metadata for the specified UUID, optionally including the custom data object for each.

Method(s)

To Get UUID Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.GetUuidMetadata().Uuid(string).IncludeCustom(bool)
   

   Parameter	Type	Required	Description
   Uuid	string	Yes	Unique user identifier. If not supplied then current user's Uuid is used.
   IncludeCustom	bool	Optional	Whether to fetch Custom fields or not.

Basic Usage

// Get Metadata for UUID set in the pubnub instance
PNResult<PNGetUuidMetadataResult> getUuidMetadataResponse = await pubnub.GetUuidMetadata()
    .ExecuteAsync();
PNGetUuidMetadataResult getUuidMetadataResult = getUuidMetadataResponse.Result;
PNStatus status = getUuidMetadataResponse.Status;

// Get Metadata for a specific UUID
PNResult<PNGetUuidMetadataResult> getUuidMetadataResponse = await pubnub.GetUuidMetadata()
    .Uuid("my-uuid")
    .ExecuteAsync();
PNGetUuidMetadataResult getUuidMetadataResult = getUuidMetadataResponse.Result;
PNStatus status = getUuidMetadataResponse.Status;

Response

{
    "Uuid": "uuid-1",
    "Name": "John Doe",
    "Email": "jack@twitter.com",
    "ExternalId": null,
    "ProfileUrl": null,
    "Custom": null,
    "Updated": "2020-06-17T16:28:14.060718Z"
}

Set User Metadata

Description

Set metadata for a UUID in the database, optionally including the custom data object for each.

Method(s)

To Set UUID Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.SetUuidMetadata().Uuid(string).Name(string).Email(string).ExternalId(string).ProfileUrl(string).Custom(Dictionary<string, object>).IncludeCustom(bool)
   

   Parameter	Type	Required	Description
   Uuid	string	Yes	Unique user identifier. If not supplied then current user's Uuid is used.
   Name	string	Yes	Display name for the user. Maximum 200 characters.
   Email	string	Optional	The user's email address. Maximum 80 characters.
   ExternalId	string	Optional	User's identifier in an external system
   ProfileUrl	string	Optional	The URL of the user's profile picture
   Custom	Dictionary<string, object>	Optional	JSON object of key-value pairs with supported data types.
   IncludeCustom	bool	Optional	Whether to fetch Custom fields or not.

Basic Usage

// Set Metadata for UUID set in the pubnub instance
PNResult<PNSetUuidMetadataResult> setUuidMetadataResponse = await pubnub.SetUuidMetadata()
    .Uuid(config.Uuid)
    .Name("John Doe")
    .Email("john.doe@user.com")
    .ExecuteAsync();
PNSetUuidMetadataResult setUuidMetadataResult = setUuidMetadataResponse.Result;
PNStatus status = setUuidMetadataResponse.Status;

Response

{
    "Uuid": "uuid-1",
    "Name": "John Doe",
    "Email": "jack@twitter.com",
    "ExternalId": null,
    "ProfileUrl": null,
    "Custom": null,
    "Updated": "2020-06-17T16:28:14.060718Z"
}

Remove User Metadata

Description

Removes the metadata from a specified UUID.

Method(s)

To Remove UUID Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.RemoveUuidMetadata().Uuid(string)
   

   Parameter	Type	Required	Description
   Uuid	string	Optional	Unique user identifier. If not supplied then current user's Uuid is used.

Basic Usage

// Remove Metadata for UUID set in the pubnub instance
PNResult<PNRemoveUuidMetadataResult> removeUuidMetadataResponse = await pubnub.RemoveUuidMetadata()
    .ExecuteAsync();
PNRemoveUuidMetadataResult removeUuidMetadataResult = removeUuidMetadataResponse.Result;
PNStatus status = removeUuidMetadataResponse.Status;

Response

{}

Channel

Get Metadata for All Channels

Description

Returns a paginated list of Channel Metadata objects, optionally including the custom data object for each.

Method(s)

To Get All Channel Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.GetAllChannelMetadata().IncludeCustom(bool).IncludeCount(bool).Page(PNPageObject).Sort(List<string>).Filter(string)
   

   Parameter	Type	Required	Description
   IncludeCustom	bool	Optional	Whether to fetch Custom fields or not.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.
   Filter	string	Optional	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here.

Basic Usage

PNResult<PNGetAllChannelMetadataResult> getAllChannelMetadataResponse = await pubnub.GetAllChannelMetadata()
    .IncludeCount(true)
    .IncludeCustom(true)
    .ExecuteAsync();

PNGetAllChannelMetadataResult getAllChannelMetadataResult = getAllChannelMetadataResponse.Result;
PNStatus status2 = getAllChannelMetadataResponse.Status;

Response

{
    "Channels": [
        {
            "Channel": "my-channel",
            "Name": "My channel",
            "Description": "A channel that is mine",
            "Custom": null,
            "Updated": "2020-06-17T16:52:19.562469Z"
        },
        {
            "Channel": "main",
            "Name": "Main channel",
            "Description": "The main channel",
            "Custom": {
                "public": true,
                "motd": "Always check your spelling!"
            },
            "Updated": "2020-06-17T16:52:19.562469Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MTE",
        "Prev": ""
    }
}

Get Channel Metadata

Description

Returns metadata for the specified Channel, optionally including the custom data object for each.

Method(s)

To Get Channel Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.GetChannelMetadata().Channel(string).IncludeCustom(bool)
   

   Parameter	Type	Required	Description
   Channel	string	Yes	Channel name.
   IncludeCustom	bool	Optional	Whether to fetch Custom fields or not.

Basic Usage

// Get Metadata for a specific channel
PNResult<PNGetChannelMetadataResult> getChannelMetadataResponse = await pubnub.GetChannelMetadata()
    .Channel("my-channel")
    .IncludeCustom(true)
    .ExecuteAsync();

PNGetChannelMetadataResult getChannelMetadataResult = getChannelMetadataResponse.Result;
PNStatus status = getChannelMetadataResponse.Status;

Response

{
    "Channel": "my-channel",
    "Name": "My channel",
    "Description": "A channel that is mine",
    "Custom": null,
    "Updated": "2020-06-17T16:52:19.562469Z"
}

Set Channel Metadata

Description

Set metadata for a Channel in the database, optionally including the custom data object for each.

Method(s)

To Set Channel Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.SetChannelMetadata().Channel(string).Name(string).Description(string).Custom(Dictionary<string, object>).IncludeCustom(bool)
   

   Parameter	Type	Required	Description
   Channel	string	Yes	Channel name.
   Name	string	Optional	Name of a channel.
   Description	string	Optional	Description of a channel.
   Custom	Dictionary<string, object>	Optional	Include respective additional fields in the response.
   IncludeCustom	bool	Optional	Whether to fetch custom fields or not.

Basic Usage

// Set Metadata for a specific channel
PNResult<PNSetChannelMetadataResult> setChannelMetadataResponse = await pubnub.SetChannelMetadata()
    .Channel("my-channel")
    .Name("John Doe")
    .Description("sample description")
    .Custom(new Dictionary<string, object>() { { "color", "blue" } })
    .IncludeCustom(true)
    .ExecuteAsync();

PNSetChannelMetadataResult setChannelMetadataResult = setChannelMetadataResponse.Result;
PNStatus status = setChannelMetadataResponse.Status;

Response

{
    "Channel": "my-channel",
    "Name": "John Doe",
    "Description": "sample description",
    "Custom": {
        "color": "blue"
    },
    "Updated": "2020-06-17T16:52:19.562469Z"
}

Remove Channel Metadata

Description

Removes the metadata from a specified channel.

Method(s)

To Remove Channel Metadata you can use the following method(s) in the C# V4 SDK:

1. pubnub.RemoveChannelMetadata().Channel(string)
   

   Parameter	Type	Required	Description
   Channel	string	Yes	Channel name.

Basic Usage

// Delete Metadata for a specific channel
PNResult<PNRemoveChannelMetadataResult> removeChannelMetadataResponse = await pubnub.RemoveChannelMetadata()
    .Channel("mychannel")
    .ExecuteAsync();

PNRemoveChannelMetadataResult removeChannelMetadataResult = removeChannelMetadataResponse.Result;
PNStatus status = removeChannelMetadataResponse.Status;

Response

{}

Channel Memberships

Get Channel Memberships

Description

The method returns a list of channel memberships for a user. This method doesn't return a user's subscriptions.

Method(s)

To Get Memberships you can use the following method(s) in the C# V4 SDK:

1. pubnub.GetMemberships().Uuid(string).Include(PNMembershipField[]).IncludeCount(bool).Page(PNPageObject)
   

   Parameter	Type	Required	Description
   Uuid	string	Optional	Unique user identifier. If not supplied then current user's Uuid is used.
   Include	PNMembershipField[]	Optional	Include respective additional fields in the response.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.

Basic Usage

PNResult<PNGetMembershipsResult> getMembershipsResponse = await pubnub.GetMemberships()
    .Uuid("my-uuid")
    .Include(new PNMembershipField[] { PNMembershipField.CUSTOM, PNMembershipField.CHANNEL, PNMembershipField.CHANNEL_CUSTOM })
    .IncludeCount(true)
    .Page(new PNPageObject() { Next = "", Prev = "" })
    .ExecuteAsync();

PNGetMembershipsResult getMembeshipsResult = getMembershipsResponse.Result;
PNStatus status = getMembershipsResponse.Status;

Response

{
    "Memberships": [
        {
            "ChannelMetadata": {
                "Channel": "my-channel",
                "Name": "My channel",
                "Description": "A channel that is mine",
                "Custom": null,
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "starred": false
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        },
        {
            "ChannelMetadata": {
                "Channel": "main",
                "Name": "Main channel",
                "Description": "The main channel",
                "Custom": {
                    "public": true,
                    "motd": "Always check your spelling!"
                },
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "item": "book"
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MQ",
        "Prev": ""
    }
}

Set Channel Memberships

Description

Set channel memberships for a UUID.

Method(s)

To Set Memberships you can use the following method(s) in the C# V4 SDK:

1. pubnub.SetMemberships().Uuid(string).Channels(List<PNMembership>).Include(PNMembershipField[]).IncludeCount(bool).Page(PNPageObject).Sort(List<string>).Filter(string).Limit(int)
   

   Parameter	Type	Required	Description
   Uuid	string	Optional	Unique user identifier. If not supplied then current user's Uuid is used.
   Channels	List	Yes	List of Channels to add to membership. List can contain strings (channel-name only) or objects (which can include custom data).
   Include	PNMembershipField[]	Optional	Include respective additional fields in the response.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.
   Filter	string	Optional	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here.
   Limit	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.

Basic Usage

List<PNMembership> setMembershipChannelMetadataIdList = new List<PNMembership>();
if (!string.IsNullOrEmpty(seMembershipChannelMetaId))
{
    setMembershipChannelMetadataIdList.Add(new PNMembership() { Channel = "my-channel", Custom = new Dictionary<string, object>() { { "item", "book" } } });
}

PNResult<PNMembershipsResult> setMembershipsResponse = await pubnub.SetMemberships()
    .Uuid("my-uuid")
    .Channels(setMembershipChannelMetadataIdList)
    .Include(new PNMembershipField[] { PNMembershipField.CUSTOM, PNMembershipField.CHANNEL, PNMembershipField.CHANNEL_CUSTOM })
    .IncludeCount(true)
    .ExecuteAsync();

PNMembershipsResult setMembershipsResult = setMembershipsResponse.Result;
PNStatus status = setMembershipsResponse.Status;

Response

{
    "Memberships": [
        {
            "ChannelMetadata": {
                "Channel": "my-channel",
                "Name": "My channel",
                "Description": "A channel that is mine",
                "Custom": null,
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "starred": false
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        },
        {
            "ChannelMetadata": {
                "Channel": "main",
                "Name": "Main channel",
                "Description": "The main channel",
                "Custom": {
                    "public": true,
                    "motd": "Always check your spelling!"
                },
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "item": "book"
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MQ",
        "Prev": ""
    }
}

Remove Channel Memberships

Description

Remove channel memberships for a UUID.

Method(s)

To Remove Memberships you can use the following method(s) in the C# V4 SDK:

1. pubnub.RemoveMemberships().Uuid(string).Channels(List<string>).Include(PNMembershipField[]).IncludeCount(bool).Page(PNPageObject).Sort(List<string>).Filter(string).Limit(int)
   

   Parameter	Type	Required	Description
   Uuid	String	Optional	Unique user identifier. If not supplied then current user's Uuid is used.
   Channels	List	Yes	Channels to remove from membership.
   Include	PNMembershipField[]	Optional	Include respective additional fields in the response.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.
   Filter	string	Optional	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here.
   Limit	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.

Basic Usage

List<string> removeMembershipList = new List<string>();
if (!string.IsNullOrEmpty(removeMembershipChannelMetaId))
{
    removeMembershipList.Add("my-channel");
    removeMembershipList.Add("your-channel");
}

PNResult<PNMembershipsResult> removeMembershipsResponse = await pubnub.RemoveMemberships()
    .Uuid("uuid")
    .Channels(removeMembershipList)
    .Include(new PNMembershipField[] { PNMembershipField.CUSTOM, PNMembershipField.CHANNEL, PNMembershipField.CHANNEL_CUSTOM })
    .IncludeCount(true)
    .ExecuteAsync();

PNMembershipsResult removeMembershipsResult = removeMembershipsResponse.Result;
PNStatus status2 = removeMembershipsResponse.Status;

Response

{
    "Memberships": [
        {
            "ChannelMetadata": {
                "Channel": "my-channel",
                "Name": "My channel",
                "Description": "A channel that is mine",
                "Custom": null,
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "starred": false
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        },
        {
            "ChannelMetadata": {
                "Channel": "main",
                "Name": "Main channel",
                "Description": "The main channel",
                "Custom": {
                    "public": true,
                    "motd": "Always check your spelling!"
                },
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "item": "book"
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MQ",
        "Prev": ""
    }
}

Manage Channel Memberships

Description

The method Set and Remove channel memberships for a user.

Method(s)

To Manage Memberships you can use the following method(s) in the C# V4 SDK:

1. pubnub.ManageMemberships().Uuid(string).Set(List<PNMembership>).Remove(List<string>).Include(PNMembershipField[]).IncludeCount(bool).Page(PNPageObject).Sort(List<string>)
   

   Parameter	Type	Required	Description
   Uuid	string	Optional	Unique user identifier. If not supplied then current user's Uuid is used.
   Set	List	Optional	Set channel memberships for the user.
   Remove	List	Optional	Remove channel memberships for the user.
   Include	PNMembershipField[]	Optional	Include respective additional fields in the response.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.

Basic Usage

List<PNMembership> setMembrshipList = new List<PNMembership>();
setMembrshipList.Add(new PNMembership() { Channel = "ch1", Custom = new Dictionary<string, object>() { { "say","hello" } } });
setMembrshipList.Add(new PNMembership() { Channel = "ch2", Custom = new Dictionary<string, object>() { { "say", "world" } } });
setMembrshipList.Add(new PNMembership() { Channel = "ch3", Custom = new Dictionary<string, object>() { { "say", "bye" } } });

List<string> removeMembrshipList = new List<string>();
removeMembrshipList.Add("ch4");

PNResult<PNManageMembershipsResult> manageMmbrshipsResponse = await pubnub.ManageMemberships()
    .Uuid("my-uuid")
    .Set(setMembrshipList)
    .Remove(removeMembrshipList)
    .Include(new PNMembershipField[] { PNMembershipField.CUSTOM, PNMembershipField.CHANNEL, PNMembershipField.CHANNEL_CUSTOM })
    .IncludeCount(true)
    .Page(new PNPageObject() { Next = "", Prev = "" })
    .Sort(new List<string>() { "channel.id:asc" })
    .ExecuteAsync();

PNManageMembershipsResult manageMmbrshipsResult = manageMmbrshipsResponse.Result;
PNStatus status = manageMmbrshipsResponse.Status;

Response

{
    "Memberships": [
        {
            "ChannelMetadata": {
                "Channel": "my-channel",
                "Name": "My channel",
                "Description": "A channel that is mine",
                "Custom": null,
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "starred": false
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        },
        {
            "ChannelMetadata": {
                "Channel": "main",
                "Name": "Main channel",
                "Description": "The main channel",
                "Custom": {
                    "public": true,
                    "motd": "Always check your spelling!"
                },
                "Updated": "2020-06-17T16:55:44.632042Z"
            },
            "Custom": {
                "item": "book"
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MQ",
        "Prev": ""
    }
}

Channel Members

Get Channel Members

Description

The method returns a list of members in a channel. The list will include user metadata for members that have additional metadata stored in the database.

Method(s)

To Get Channel Members you can use the following method(s) in the C# V4 SDK:

1. pubnub.GetChannelMembers().Channel(string).Include(PNChannelMemberField[]).IncludeCount(bool).Page(PNPageObject).Sort(List<string>).Filter(string).Limit(int)
   

   Parameter	Type	Required	Description
   Channel	string	Yes	Channel name.
   Include	PNChannelMemberField[]	Optional	Include respective additional fields in the response.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.
   Filter	string	Optional	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here.
   Limit	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.

Basic Usage

// Get Members (uuids) for a specific channel
PNResult<PNChannelMembersResult> getChannelMembersResponse = await pubnub.GetChannelMembers()
    .Channel("my-channel")
    .Include(new PNChannelMemberField[] { PNChannelMemberField.CUSTOM, PNChannelMemberField.UUID, PNChannelMemberField.UUID_CUSTOM })
    .IncludeCount(true)
    .ExecuteAsync();

PNChannelMembersResult getChannelMembersResult = getChannelMembersResponse.Result;
PNStatus status2 = getChannelMembersResponse.Status;

Response

{
    "ChannelMembers": [
        {
            "UuidMetadata": {
                "Uuid": "uuid-1",
                "Name": "John Doe",
                "Email": "jack@twitter.com",
                "ExternalId": "",
                "ProfileUrl": "",
                "Custom": null,
                "Updated": "2019-02-20T23:11:20.89375"
            },
            "Custom": {
                "role": "admin"
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        },
        {
            "UuidMetadata": {
                "Uuid": "uuid-2",
                "Name": "Bob Cat",
                "Email": "bobc@example.com",
                "ExternalId": "",
                "ProfileUrl": "",
                "Custom": {
                    "phone": "999-999-9999"
                },
                "Updated": "2019-02-20T23:11:20.89375"
            },
            "Custom": null,
            "Updated": "2020-06-17T17:05:25.987964Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MQ",
        "Prev": ""
    }
}

Set Channel Members

Description

This method sets members in a channel.

Method(s)

To Set Channel Members you can use the following method(s) in the C# V4 SDK:

1. pubnub.SetChannelMembers().Channel(string).Uuids(List<PNChannelMember>).Include(PNChannelMemberField[]).Page(PNPageObject).Sort(List<string>).Filter(string).Limit(int)
   

   Parameter	Type	Required	Description
   Channel	String	Yes	Channel name.
   Uuids	List	Yes	List of members to add to the channel. List can contain strings (Uuids only) or objects (which can include custom data).
   Include	PNChannelMemberField[]	Optional	Include respective additional fields in the response.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.
   Filter	string	Optional	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here.
   Limit	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.

Basic Usage

// Add Members (UUID) for a specific channel
List<PNChannelMember> setMemberChannelList = new List<PNChannelMember>();
if (!string.IsNullOrEmpty(setMemberChUuid))
{
    setMemberChannelList.Add(new PNChannelMember() { Uuid = "my-uuid", Custom = new Dictionary<string, object>() { { "planet", "earth" } } });
}
PNResult<PNChannelMembersResult> setChannelMembersResponse = await pubnub.SetChannelMembers()
    .Channel(setmemberChMetadataId)
    .Uuids(setMemberChannelList)
    .Include(new PNChannelMemberField[] { PNChannelMemberField.CUSTOM, PNChannelMemberField.UUID, PNChannelMemberField.UUID_CUSTOM })
    .IncludeCount(true)
    .ExecuteAsync();

PNChannelMembersResult setChannelMembersResult = setChannelMembersResponse.Result;
PNStatus status2 = setChannelMembersResponse.Status;

Response

{
    "ChannelMembers": [
        {
            "UuidMetadata": {
                "Uuid": "uuid-1",
                "Name": "John Doe",
                "Email": "jack@twitter.com",
                "ExternalId": "",
                "ProfileUrl": "",
                "Custom": null,
                "Updated": "2019-02-20T23:11:20.89375"
            },
            "Custom": {
                "role": "admin"
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        },
        {
            "UuidMetadata": {
                "Uuid": "uuid-2",
                "Name": "Bob Cat",
                "Email": "bobc@example.com",
                "ExternalId": "",
                "ProfileUrl": "",
                "Custom": {
                    "phone": "999-999-9999"
                },
                "Updated": "2019-02-20T23:11:20.89375"
            },
            "Custom": null,
            "Updated": "2020-06-17T17:05:25.987964Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MQ",
        "Prev": ""
    }
}

Remove Channel Members

Description

Remove members from a Channel.

Method(s)

To Remove Channel Members you can use the following method(s) in the C# V4 SDK:

1. pubnub.RemoveChannelMembers().Channel(string).Remove( List).Include(PNChannelMembersInclude[]).Limit(int).Count(bool).Start(string).End(string).Sort(List).Async()
   

   Parameter	Type	Required	Description
   Channel	string	Yes	Channel name.
   Uuids	List	Yes	Members to remove from channel.
   Include	PNChannelMemberField[]	Optional	Include respective additional fields in the response.
   IncludeCount	bool	Optional	Request IncludeCount to be included in paginated response. By default, IncludeCount is omitted.
   Page	PNPageObject	Optional	Use for pagination.
   Sort	List	Optional	List of properties to sort by. Use asc or desc to specify sort direction.
   Filter	string	Optional	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here.
   Limit	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.

Basic Usage

// Remove Members (UUID) for a specific channel
List<string> removeChannelMemberList = new List<string>();
removeChannelMemberList.Add("my-uuid");
removeChannelMemberList.Add("your-uuid");

PNResult<PNChannelMembersResult> removeChannelMembersResponse = await pubnub.RemoveChannelMembers()
    .Channel("my-channel")
    .Uuids(removeChannelMemberList)
    .Include(new PNChannelMemberField[] { PNChannelMemberField.CUSTOM, PNChannelMemberField.UUID, PNChannelMemberField.UUID_CUSTOM })
    .IncludeCount(true)
    .ExecuteAsync();

PNChannelMembersResult removeChannelMembersResult = removeChannelMembersResponse.Result;
PNStatus status = removeChannelMembersResponse.Status;

Response

{
    "ChannelMembers": [
        {
            "UuidMetadata": {
                "Uuid": "uuid-1",
                "Name": "John Doe",
                "Email": "jack@twitter.com",
                "ExternalId": "",
                "ProfileUrl": "",
                "Custom": null,
                "Updated": "2019-02-20T23:11:20.89375"
            },
            "Custom": {
                "role": "admin"
            },
            "Updated": "2020-06-17T17:05:25.987964Z"
        },
        {
            "UuidMetadata": {
                "Uuid": "uuid-2",
                "Name": "Bob Cat",
                "Email": "bobc@example.com",
                "ExternalId": "",
                "ProfileUrl": "",
                "Custom": {
                    "phone": "999-999-9999"
                },
                "Updated": "2019-02-20T23:11:20.89375"
            },
            "Custom": null,
            "Updated": "2020-06-17T17:05:25.987964Z"
        }
    ],
    "TotalCount": 2,
    "Page": {
        "Next": "MQ",
        "Prev": ""
    }
}

Objects Filtering Language Definition

The filtering language for Objects is similar to the stream filtering language.

Note the following:

• Date/time properties, such as updated, must be compared to valid date/time strings formatted according to ISO 8601.
• Custom properties must have the same type as the value used in the expression; it is an error to compare a custom property of one type to a value of another type.
• Objects that do not have the referenced custom property at all are excluded regardless of the operator or value used in the expression. The null value can be used to filter out objects that do or do not have the referenced custom property.
• The LIKE operator supports wildcards denoted by the * character. A wildcard matches any sequence of arbitrary Unicode characters, including the empty sequence. The literal asterisk is matched when escaped using the backslash (\) character.
• Values used with LIKE must be properly encoded just like any other string value. Thus, in order to escape an asterisk, the raw value must contain \\*.
• The entire expression must be properly URL-encoded when used in the query string.

<expression>           ::= <and_expression> ( "||" <and_expression> )*
<and_expression>       ::= <binary_condition> ( "&&" <binary_condition> )*
<binary_condition>     ::= "!" <binary_condition> | "(" <expression> ")" | <relational_condition>
<relational_condition> ::= <property_path> <relational_operator> <value>
<property_path>        ::= <property_name> ( "." <property_name> )*
<property_name>        ::= <identifier> | "[" <string> "]"
<value>                ::= <string> | <number> | "true" | "false" | "null"

Tokens

<identifier>           ::=  <letter> | "$" | "_" ( <letter> | "$" | "_" | <digit> )*
<relational_operator>  ::= "==" | "!=" | "<=" | ">=" | "<" | ">" | "LIKE"
<string>               ::= <double_quote> ( "\" <double_quote> | "\" <special_char>
                            | "\" "u" <hex_digit> <hex_digit> <hex_digit> <hex_digit>
                            | <unicode_char> - <double_quote> - "\" )* <double_quote>
                            | "'" ( "\" "'" | "\" <special_char>
                            | "\" "u" <hex_digit> <hex_digit> <hex_digit> <hex_digit>
                            | <unicode_char> - "'" - "\" )* "'"
<number>               ::= ( "+" | "-" )? ( <digit> )* ( "." )? <digit> ( <digit> )*
                            ( "e" | "E" ( "+" | "-" )? <digit> ( <digit> )* )?
<letter>               ::= Unicode Letter (category; any kind of letter from any language)
<digit>                ::= "0" .. "9"
<hex_digit>            ::= <digit> | "A" .. "F"
<double_quote>         ::= the " character
<unicode_char>         ::= any character in the Unicode range from U+0020 to U+10FFFF inclusive
<special_char>         ::= "\" | "/" | "b" | "f" | "n" | "r" | "t"

Sample object filtering operations

The following simple expression returns results whose custom property named public is equal to Boolean true.

custom.public == true

The following date/time comparison returns results that were modified on or after August 31st, 2019 (UTC):

updated >= "2019-08-31T00:00:00Z"

The following compound expression returns results that don't have a description, but do have a non-empty custom label or description property:

description == null && (custom.label != "" || custom.description != "")

The following wildcard expression returns results whose name starts with the letter X:

name LIKE 'X*'

The following escaped wildcard expression returns results whose name contains an asterisk:

name LIKE '*\\**'