From c18079545c89f0cac8aa3436a56292c5c4c30fde Mon Sep 17 00:00:00 2001
From: Roland <195342210+rpodevns@users.noreply.github.com>
Date: Sat, 18 Jan 2025 14:16:20 +0000
Subject: [PATCH] [FluentInputFile] Add OnFileCountExceeded callback (#3205)

Co-authored-by: rpodevns <rpodevns@users.noreply.github.com>
---
 .../Microsoft.FluentUI.AspNetCore.Components.xml    |  6 ++++++
 .../Components/InputFile/FluentInputFile.razor.cs   | 13 ++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/examples/Demo/Shared/Microsoft.FluentUI.AspNetCore.Components.xml b/examples/Demo/Shared/Microsoft.FluentUI.AspNetCore.Components.xml
index fd33e4bec..4b0582b34 100644
--- a/examples/Demo/Shared/Microsoft.FluentUI.AspNetCore.Components.xml
+++ b/examples/Demo/Shared/Microsoft.FluentUI.AspNetCore.Components.xml
@@ -5145,6 +5145,12 @@
             Raise when a file raised an error. Not yet used.
             </summary>
         </member>
+        <member name="P:Microsoft.FluentUI.AspNetCore.Components.FluentInputFile.OnFileCountExceeded">
+            <summary>
+            Raised when the <see cref="P:Microsoft.FluentUI.AspNetCore.Components.FluentInputFile.MaximumFileCount"/> is exceeded.
+            The return parameter specifies the total number of files that were attempted for upload.
+            </summary>
+        </member>
         <member name="P:Microsoft.FluentUI.AspNetCore.Components.FluentInputFile.OnCompleted">
             <summary>
             Raise when all files are completely uploaded.
diff --git a/src/Core/Components/InputFile/FluentInputFile.razor.cs b/src/Core/Components/InputFile/FluentInputFile.razor.cs
index 43a874455..293d58651 100644
--- a/src/Core/Components/InputFile/FluentInputFile.razor.cs
+++ b/src/Core/Components/InputFile/FluentInputFile.razor.cs
@@ -146,6 +146,13 @@ public FluentInputFile()
     [Parameter]
     public EventCallback<FluentInputFileEventArgs> OnFileError { get; set; }
 
+    /// <summary>
+    /// Raised when the <see cref="MaximumFileCount"/> is exceeded.
+    /// The return parameter specifies the total number of files that were attempted for upload.
+    /// </summary>
+    [Parameter]
+    public EventCallback<int> OnFileCountExceeded { get; set; }
+
     /// <summary>
     /// Raise when all files are completely uploaded.
     /// </summary>
@@ -215,7 +222,11 @@ protected async Task OnUploadFilesHandlerAsync(InputFileChangeEventArgs e)
     {
         if (e.FileCount > MaximumFileCount)
         {
-            throw new ApplicationException($"The maximum number of files accepted is {MaximumFileCount}, but {e.FileCount} were supplied.");
+            if (OnFileCountExceeded.HasDelegate)
+            {
+                await OnFileCountExceeded.InvokeAsync(e.FileCount);
+            }
+            return;
         }
 
         // Use the native Blazor event