html - 将网页 HTML 下载为 UTF-8 字符串

Question

我想下载在线页面的内部 html，但是当我这样做时，像 šđčćž 这样的字符会被 ć¡ 等替换。

我正在使用的代码:

Dim sourceString As String = New System.Net.WebClient().DownloadString("SomeWebPage")
TextBox1.Text = sourceString

Answer 1

您可能必须下载字节，然后使用 Encoding 类转换为 UTF8:

Async Function GetHtmlString(address As String) As Task(Of String)
    Using client As New WebClient
        Dim bytes  = Await client.DownloadDataTaskAsync(address)
        Dim s  = Encoding.UTF8.GetString(bytes)
        return s
    End Using
End Function

感谢 @dave 的评论，一种更简单的方法:

Async Function GetHtmlString(address As String) As Task(Of String)
    Using client As New WebClient
        client.Encoding = Encoding.UTF8
        Dim s  = Await client.DownloadStringTaskAsync(address)
        return s
    End Using
End Function

使用示例:

Imports System.Net
Imports System.Text

Public Class Form1
    Private Async Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim s = Await GetHtmlString("http://www.radiomerkury.pl/")
    End Sub

    Async Function GetHtmlString(address As String) As Task(Of String)
        Using client As New WebClient
            client.Encoding = Encoding.UTF8
            Dim s = Await client.DownloadStringTaskAsync(address)
            Return s
        End Using
    End Function
End Class