fix(Widget): throw exception when dispose

[ArgoZhang]

throw exception when dispose

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 #4664

Regression?

• Yes
• No

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

[是否影响老版本]

Risk

• High
• Medium
• Low

[Justify the selection above]

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

Bug Fixes:

• Fix the dispose function in DropdownWidget to properly remove event listeners by checking if the element exists before attempting to remove events.

[sourcery-ai]

Reviewer's Guide by Sourcery

The PR improves the dispose functionality in the DropdownWidget component by adding proper event handler cleanup and null checks. The changes ensure that both 'shown' and 'hidden' dropdown events are properly unsubscribed when the component is disposed.

Sequence diagram for DropdownWidget dispose process

sequenceDiagram
    participant User
    participant DropdownWidget
    participant EventHandler

    User->>DropdownWidget: Call dispose(id)
    DropdownWidget->>DropdownWidget: Get element by id
    alt Element exists
        DropdownWidget->>EventHandler: off(el, 'shown.bs.dropdown')
        DropdownWidget->>EventHandler: off(el, 'hidden.bs.dropdown')
    end

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File-Level Changes

Change	Details	Files
Enhanced event handler cleanup in dispose function	Added null check for element before cleanup Added cleanup for 'shown.bs.dropdown' event Maintained cleanup for 'hidden.bs.dropdown' event Added element retrieval by ID	src/BootstrapBlazor/Components/DropdownWidget/DropdownWidget.razor.js src/BootstrapBlazor/BootstrapBlazor.csproj

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#4664	Fix exception thrown when disposing DropdownWidget component	✅

Possibly linked issues

• bug(Widget): throw exception when dispose #4664: The PR fixes the exception issue during dispose as described in the issue.

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[sourcery-ai]

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

Overall Comments:

• The PR title is misleading - the changes prevent exceptions rather than throwing them. Please update it to something like 'fix(Widget): prevent exceptions during disposal' or similar.
• Please complete the PR template fully in English to help with project tracking and maintenance. Several sections are currently incomplete or in Chinese.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 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 (525eaac) to head (a4a439a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #4665   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          620       620           
  Lines        27427     27427           
  Branches      3929      3929           
=========================================
  Hits         27427     27427           

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