Imports System.Net.NetworkInformation ‘引用顶部 Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Try If (My.Computer.Network.Ping(TextBox1.Text)) Then MsgBox("远程地址可访问") Else MsgBox("远程地址不可访问") End If Catch exPing As PingException MsgBox("远程地址无效") Catch exInvalidate As InvalidOperationException MsgBox("没有有效的网络连接") End Try End Sub End Class |
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