feat(ButtonUpload): add FileCount parameter

[ArgoZhang]

add FileCount parameter

Summary of the changes (Less than 80 chars)

简单描述你更改了什么, 不超过80个字符；如果有关联 Issue 请在下方填写相关编号

Description

fixes #5329

Regression?

• Yes
• No

[If yes, specify the version the behavior has regressed from]

[是否影响老版本]

Risk

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• Medium
• Low

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Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Add FileCount parameter to UploadFile class and update ButtonUpload component to use it.

New Features:

• Add a FileCount parameter to the UploadFile class to track the number of uploaded files.

Bug Fixes:

• Resolve issue feat(ButtonUpload): 多选文件后，无法取到选择的文件个数 #5329

Tests:

• Add a test case for the ButtonUpload component to verify the FileCount parameter.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces a FileCount parameter to the ButtonUpload component, allowing users to track the number of files uploaded. A unit test was also added to verify the functionality.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Added a FileCount property to the UploadFile class to track the number of files uploaded.	Added a FileCount property with a default value of 1. The FileCount property is initialized in ButtonUploadBase.cs with the value of args.FileCount from the InputFileChangeEventArgs.	src/BootstrapBlazor/Components/Upload/UploadFile.cs src/BootstrapBlazor/Components/Upload/ButtonUploadBase.cs
Added a unit test to verify the FileCount property when uploading directories.	Added a new test case ButtonUpload_IsDirectory_Ok to check the FileCount property. Assert that the FileCount property is equal to the number of files when a directory is uploaded.	test/UnitTest/Components/UploadTest.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#5329	Provide a way to access the number of files selected in the ButtonUpload component when IsMultiple is set to true.	✅

Possibly linked issues

• feat(ButtonUpload): 多选文件后，无法取到选择的文件个数 #5329: The PR adds a FileCount parameter to the UploadFile class to address the issue of getting the selected file count.
• feat(ButtonUpload): 多选文件后，无法取到选择的文件个数 #5329: The PR adds a FileCount parameter to UploadFile and uses it in OnChange event, indirectly addressing the issue's need for batch upload handling.
• feat(ButtonUpload): 多选文件后，无法取到选择的文件个数 #5329: The PR fixes issue feat(ButtonUpload): 多选文件后，无法取到选择的文件个数 #5329 by adding a FileCount parameter to ButtonUpload.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider if FileCount should be nullable to differentiate between a single file upload and multiple files when the count is not explicitly provided.
• The added test case only checks the file count when IsDirectory is true; consider adding a test case when it is false or not set.

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟡 Testing: 2 issues found
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (9962e19) to head (4758ed6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #5371   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          644       644           
  Lines        29218     29220    +2     
  Branches      4125      4125           
=========================================
+ Hits         29218     29220    +2     

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