Public Class index
Inherits System.Web.UI.Page
Dim arr(9) As Integer
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
arr(0) = 23
End Sub
Protected Sub bntInsert_Click(ByVal sender As Object, ByVal e As EventArgs) Handles bntInsert.Click
arr(0) = 999
End Sub
Protected Sub bntShow_Click(ByVal sender As Object, ByVal e As EventArgs) Handles bntShow.Click
txtid.Text = arr(0).ToString
End Sub
End Class
结果是当我点击bntInsert并在bntShow之后它仍然在txtid中显示值“23”。请帮帮我!
答案 0 :(得分:0)
1:asp.net是无国籍的。 2:检查回发后事件?
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
if page.isPostBack then
arr(0) = 23
end if
End Sub
答案 1 :(得分:0)
这是因为每次点击按钮最终都会先调用page_load。我想您正在尝试使用公共变量来保留值,但您需要了解特定变量仅对特定请求有效。每个后续请求都会丢失该变量,包括按钮点击(这是一个回发)。
您可能希望将arr保留在会话变量中,以便在往返之间保存其值。