```mermaid
graph TD
    Start([開始 BarCode2CaseID]) --> Init[Result = 空字串]
    Init --> LoopStart{遍歷 MpsBarcodeinf.Count}
    LoopStart -- i=1 to Count --> CheckLen{長度 == CaseIDLength?}
    
    CheckLen -- 是 --> Found[Result = 條碼內容<br/>Break 迴圈]
    CheckLen -- 否 --> LoopNext[下一個條碼]
    LoopNext --> LoopStart
    
    Found --> End([結束])
    LoopStart -- 結束 --> End
```