If Text1.Text = "" Then MsgBox "留言内容不能为空", 64, "警告" Else MsgBox "发言成功了!", 64, "谢谢" End If Dim a1 As String Open "\\server\food$\留言板.txt" For Append As #1 a1 = Text1.Text Write #1, a1 Close #1 Text2.Text = Text1.Text Text1.Text = "" End Sub 这是vb的代码 我搬到vb.net里面怎么用啊?