【多选题】
You are developing an ASP.NET Web page. You add the following markup to the page.<img src="https://nimg.ppkao.com/2018-07/lina/2018072617231958179.jpg?sign=5bdfdd4e06d58eb035a3f57148f69687&t=62d4ff70" /><br /> You add the following code segment to the code-behind.<img src="https://nimg.ppkao.com/2018-07/lina/2018072617231376707.jpg?sign=6345aa921d34adc8cfabf4eea5f16315&t=62d4ff70" /><br /> You need to save the uploaded file and display a message to the user that indicates that the upload either succeeded or failed. Which two actions should you perform？（）
A、Replace line 3 with the following code segment. if （FileUpload1.HasFile）
B、Replace line 3 with the following code segment. if （FileUpload1.FileContent.Length > 0）
C、Insert the following code segment at line 6. FileUpload1.SaveAs（saveName）；
D、Insert the following code segment at line 6. FileUpload1.FileContent.CopyTo（new FileStream（saveName， FileMode.Open）；
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