doc(SelectGeneric): update IsEditable paraemeter sample code

[ArgoZhang]

Link issues

fixes #6134

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

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

Update the editable SelectGeneric sample to demonstrate asynchronous text-to-value conversion and adjust the component’s change logic to delegate item updates externally and restore the previous selection on null responses.

Bug Fixes:

• Restore the previous selection when TextConvertToValueCallback returns null to handle empty input resets

Enhancements:

• Add TextConvertToValueCallback implementation in the sample to simulate async conversion and dynamically add new items.
• Update sample markup to bind TextConvertToValueCallback alongside the IsEditable parameter.
• Refactor SelectGeneric’s change handler to remove internal item insertion and rely on external Items updates for returned values.

[sourcery-ai]

Reviewer's Guide

Refactored SelectGeneric to delegate editable-item insertion and reset logic to an asynchronous callback, and updated the sample to show how to pass TextConvertToValueCallback.

Class Diagram: Updates to SelectGeneric and SelectGenerics Sample

classDiagram
  class SelectGeneric~TValue~ {
    +TextConvertToValueCallback: Func<string, Task<TValue?>>
    #OnChange(ChangeEventArgs args) Task
  }
  class SelectGenerics {
    +TextConvertToValueCallback(string v) Task<Foo>
    -_genericItems: List<SelectedItem<Foo>>
    -_selectedFoo: Foo
  }
  class Foo {
    +Id: int
    +Address: string
  }
  SelectGenerics ..> Foo : uses
  SelectGenerics ..> SelectGeneric~Foo~ : configures & uses

Loading

File-Level Changes

Change	Details	Files
Added async TextConvertToValueCallback in sample component to handle free-text entries	Implemented TextConvertToValueCallback method returning a Foo object Simulated async delay and looked up or created new items Constructed and added SelectedItem for new entries Returned the resolved value to the component	src/BootstrapBlazor.Server/Components/Samples/SelectGenerics.razor.cs
Simplified internal editable-change logic in SelectGeneric	Removed internal code that injected new SelectedItem into Items Delegated CurrentValue assignment to parent when callback returns non-null Reset input via JS invocation if callback returns null Added comments clarifying the updated behavior	src/BootstrapBlazor/Components/SelectGeneric/SelectGeneric.razor.cs
Updated sample markup to wire up TextConvertToValueCallback	Added TextConvertToValueCallback attribute to SelectGeneric usage Reformatted attributes onto separate lines for clarity	src/BootstrapBlazor.Server/Components/Samples/SelectGenerics.razor

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#6134	Update the sample code for the IsEditable parameter of the SelectGeneric component.	✅

Possibly linked issues

• doc(SelectGeneric): update IsEditable paraemeter sample code #6134: The PR updates the sample code for the IsEditable parameter of the SelectGeneric component by adding a TextConvertToValueCallback example.
• doc(SelectGeneric): update IsEditable paraemeter sample code #6134: The PR updates the SelectGeneric component's editable behavior, fixing the issue where the selected value doesn't update.

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[sourcery-ai]

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

• Add a <summary> documentation entry for the new TextConvertToValueCallback parameter in SelectGeneric.razor so its purpose and usage are clearly described.
• Populate the en-US.json and zh-CN.json locale files with labels/descriptions for TextConvertToValueCallback so your samples remain fully localized.
• Consider throwing a clear exception or issuing a warning when IsEditable is true but TextConvertToValueCallback is not provided to help consumers catch misconfigurations early.

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 (f81d400) to head (14fac5e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #6135   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          703       703           
  Lines        31073     31069    -4     
  Branches      4397      4397           
=========================================
- Hits         31073     31069    -4     

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