Question

此代码显示google.com是否未打开，然后打开yahoo.com 表示如果第一个站点不工作，则第二个站点自动打开

但我不知道视觉工作室显示错误的问题是什么

预期结束语

任何人都可以告诉我如何解决这个问题请帮我解决这个问题感谢

这是我的完整代码

Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
      try webbrowser1.navigate("www.google.com")
      catch ex As exception webbrowser1.navigate("www.yahoo.com")
        End Try


    End Sub


    Private Sub Back_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Back.Click
        WebBrowser1.GoBack()

    End Sub

    Private Sub Forward_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Forward.Click
        WebBrowser1.GoForward()
    End Sub


    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        WebBrowser1.Stop()
    End Sub


    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        WebBrowser1.GoHome()
    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        WebBrowser1.Refresh()
    End Sub

    Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs)

    End Sub

    Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click

    End Sub

    Private Sub Label2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label2.Click

    End Sub

    Private Sub CloseToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CloseToolStripMenuItem.Click
        Application.Exit()

    End Sub

    Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged

    End Sub

    Private Sub WebBrowser1_DocumentCompleted_1(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted

    End Sub

End Class

Answer 1

您必须在Try：

之后放回车

    Try
        webbrowser1.navigate("www.google.com")
    Catch ex As Exception
        webbrowser1.navigate("www.yahoo.com")
    End Try

在visual studio代码中显示错误

1 个答案: