vb.net - 从字符串到类型“整数”的转换在以下代码中无效

Question

Private Sub CreatFolder()  
    ' the line below gives error like Conversion from string "C:\inetpub\wwwroot\Createfolders" to type 'Integer' is not valid
    Dim directoryPath As String = Path.GetInvalidpathChars(Server.MapPath("..\Cre_Folders\File\") & txtFolderName.Text.Trim())

    If Not Directory.Exists(directoryPath) Then
        Directory.CreateDirectory(directoryPath)
        lblsuccess.Visible = True
        'lblmsg.Visible = False
        lblValidName.Visible = False
        lblDelete.Visible = False
        lblerr.Visible = False
    Else
        ClientScript.RegisterStartupScript(Me.[GetType](), "alert", "alert('Folder already existed.');", True)
        'lblmsg.Text = "Directory Already Exists..."
        lblValidName.Visible = False
        lblDelete.Visible = False
        lblsuccess.Visible = False
        lblerr.Visible = False
    End If

    Call Treeview()
End Sub

Answer 1

我猜你得到的是编译时错误而不是运行时错误。

Path.GetInvalidPathChars() 方法不验证路径。它不需要一个字符串来告诉你是好是坏。相反，它返回一个已知在正在使用的操作系统中无效的字符数组。MSDN 示例。

另请注意，返回的字符列表可能不完整 - 请参阅：缺少？& * .