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Split MessageExtensions AttachmentLayout (list|grid) from Attachment.Layout (list|carousel) #503

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Split MessageExtensions AttachmentLayout (list|grid) from Attachment.Layout (list|carousel) #503

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Copilot May 13, 2026
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Split MessageExtensions AttachmentLayout (list|grid) from Attachment.…
Copilot May 13, 2026
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24 changes: 24 additions & 0 deletions Libraries/Microsoft.Teams.Api/MessageExtensions/AttachmentLayout.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

using System.Text.Json.Serialization;

using Microsoft.Teams.Common;

namespace Microsoft.Teams.Api.MessageExtensions;

/// <summary>
/// Hint for how to deal with multiple attachments in a messaging extension result.
/// Possible values include: 'list', 'grid'.
/// </summary>
[JsonConverter(typeof(StringEnum.JsonConverter<AttachmentLayout>))]
public class AttachmentLayout(string value) : StringEnum(value)
{
public static readonly AttachmentLayout List = new("list");
[JsonIgnore]
public bool IsList => List.Equals(Value);

public static readonly AttachmentLayout Grid = new("grid");
[JsonIgnore]
public bool IsGrid => Grid.Equals(Value);
}
2 changes: 1 addition & 1 deletion Libraries/Microsoft.Teams.Api/MessageExtensions/Result.cs
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Expand Up @@ -42,7 +42,7 @@ public class Result
/// </summary>
[JsonPropertyName("attachmentLayout")]
[JsonPropertyOrder(0)]
public Api.Attachment.Layout? AttachmentLayout { get; set; }
public AttachmentLayout? AttachmentLayout { get; set; }

/// <summary>
/// The type of the result. Possible values include:
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12 changes: 6 additions & 6 deletions Samples/Samples.MessageExtensions/Program.cs
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Expand Up @@ -60,7 +60,7 @@
ComposeExtension = new Microsoft.Teams.Api.MessageExtensions.Result
{
Type = Microsoft.Teams.Api.MessageExtensions.ResultType.Result,
AttachmentLayout = Microsoft.Teams.Api.Attachment.Layout.List,
AttachmentLayout = Microsoft.Teams.Api.MessageExtensions.AttachmentLayout.List,
Attachments = new List<Microsoft.Teams.Api.MessageExtensions.Attachment>()
}
});
Expand Down Expand Up @@ -198,7 +198,7 @@ static Microsoft.Teams.Api.MessageExtensions.Response CreateSearchResults(string
ComposeExtension = new Microsoft.Teams.Api.MessageExtensions.Result
{
Type = Microsoft.Teams.Api.MessageExtensions.ResultType.Result,
AttachmentLayout = Microsoft.Teams.Api.Attachment.Layout.List,
AttachmentLayout = Microsoft.Teams.Api.MessageExtensions.AttachmentLayout.List,
Attachments = attachments
}
};
Expand Down Expand Up @@ -233,7 +233,7 @@ static Microsoft.Teams.Api.MessageExtensions.Response HandleCreateCard(JsonEleme
ComposeExtension = new Microsoft.Teams.Api.MessageExtensions.Result
{
Type = Microsoft.Teams.Api.MessageExtensions.ResultType.Result,
AttachmentLayout = Microsoft.Teams.Api.Attachment.Layout.List,
AttachmentLayout = Microsoft.Teams.Api.MessageExtensions.AttachmentLayout.List,
Attachments = new List<Microsoft.Teams.Api.MessageExtensions.Attachment> { attachment }
}
};
Expand Down Expand Up @@ -268,7 +268,7 @@ static Microsoft.Teams.Api.MessageExtensions.Response HandleGetMessageDetails(Mi
ComposeExtension = new Microsoft.Teams.Api.MessageExtensions.Result
{
Type = Microsoft.Teams.Api.MessageExtensions.ResultType.Result,
AttachmentLayout = Microsoft.Teams.Api.Attachment.Layout.List,
AttachmentLayout = Microsoft.Teams.Api.MessageExtensions.AttachmentLayout.List,
Attachments = new List<Microsoft.Teams.Api.MessageExtensions.Attachment> { attachment }
}
};
Expand Down Expand Up @@ -303,7 +303,7 @@ static Microsoft.Teams.Api.MessageExtensions.Response CreateLinkUnfurlResponse(s
ComposeExtension = new Microsoft.Teams.Api.MessageExtensions.Result
{
Type = Microsoft.Teams.Api.MessageExtensions.ResultType.Result,
AttachmentLayout = Microsoft.Teams.Api.Attachment.Layout.List,
AttachmentLayout = Microsoft.Teams.Api.MessageExtensions.AttachmentLayout.List,
Attachments = new List<Microsoft.Teams.Api.MessageExtensions.Attachment> { attachment }
}
};
Expand Down Expand Up @@ -335,7 +335,7 @@ static Microsoft.Teams.Api.MessageExtensions.Response CreateItemSelectionRespons
ComposeExtension = new Microsoft.Teams.Api.MessageExtensions.Result
{
Type = Microsoft.Teams.Api.MessageExtensions.ResultType.Result,
AttachmentLayout = Microsoft.Teams.Api.Attachment.Layout.List,
AttachmentLayout = Microsoft.Teams.Api.MessageExtensions.AttachmentLayout.List,
Attachments = new List<Microsoft.Teams.Api.MessageExtensions.Attachment> { attachment }
}
};
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