各位先進好：
想請教如題：ASP.NET FileUpload欄位若已選取檔案，要如何把它清空呢？
比如按個按鈕，那內容就清空的功能要如何實作呢？
想請教如題：ASP.NET FileUpload欄位若已選取檔案，要如何把它清空呢？
比如按個按鈕，那內容就清空的功能要如何實作呢？
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