如何返回字符串的路径？

Question

我想问一下如何返回字符串的路径？我有这个错误消息

  

'_ Default.uploadfile（string，string）'：并非所有代码路径都返回值

private string uploadfile(String filetype, String Uploadfilename)
{
    String csFileUploadName;
    if (filetype == "FiUptrack")
    {
        csFileUploadName = "C:\\MusicStore\\uploads\\promos\\" + Uploadfilename;
    }
    else
    {
        csFileUploadName = "C:\\MusicStore\\uploads\\images\\" + Uploadfilename;
    }        

    try
    {
        FiUptrack.SaveAs(csFileUploadName);
        lblRequired.Text = "Upload status: File uploaded!";
        return csFileUploadName.ToString();
    }
    catch (Exception ex)
    {
        lblRequired.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message;
    }
}

用法：

  csArtworkupload = uploadfile("Artworkupload", FiUptrack.FileName);

csArtworkupload是一个字符串

Answer 1

正如错误消息明确指出的那样，您的方法并不总是返回任何内容。

具体而言，如果抛出异常，则不会执行return语句。

Answer 2

该错误是因为您没有在代码中的所有执行路径中返回 - 即某些分支不会导致返回。

尝试将其放在代码的末尾：

return csArtworkupload;