Question

以下是从网站下载zip文件的脚本代码，但是我收到了一个编译错误，指出了预期的标识符＆＃39;。

Public Class DownloadAddrFile
    Public Function DownloadFile(ByVal Addr As String, ByVal SaveAddrFile As String) As Boolean
        Try 
            Dim WC As New System.Net.WebClient()
            WC.DownloadFile(Addr, SaveAddrFile)
            Return True
        Catch ex As Exception
            MessageBox.Show(ex.Message)
            Return False
        End Try
    End Function
End Class

Call DownloadFile("http://data.gdeltproject.org/events/index.html/20171002.export.CSV.zip", "C:\Users\mwhiting\Documents\Zip_files\data.zip")

任何有关如何完成这项工作的帮助都会很棒！

Answer 1

您无法在Namespace内调用方法。

创建类DownloadAddrFile的实例，例如在按钮内单击调用方法DownloadFile。（通常不需要Call - 关键字）

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim d As New DownloadAddrFile
    d.DownloadFile("http://data.gdeltproject.org/events/index.html/20171002.export.CSV.zip", "C:\Users\mwhiting\Documents\Zip_files\data.zip")
End Sub

VB编译错误，预期标识符

1 个答案: