提交以后，public变量的值怎么会不在了呢？

[ynduanlian]

我声明了public strCurSchool变量，然在点击提交RbLstTeachers_SelectedIndexChanged中给它赋值，然后再次点按钮提交网页，但是Response.Write(strCurSchool)却没有输出任何东西，是什么问题？

    Public StrCurSchool As String
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        If Not Page.IsPostBack Then
            Dim StrCon As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("../data.mdb")
            Dim Sb As StringBuilder = New StringBuilder("Select ID,(TeacherID & '-' & Name ) as Name   from [Schools]")
            Dim Cn As OleDbConnection = New OleDbConnection(StrCon)
            Dim Ds As DataSet = New DataSet()
            Dim Da As OleDbDataAdapter = New OleDbDataAdapter(Sb.ToString(), Cn)
            Da.Fill(Ds, "Schools")
            Cn.Close()
            RbLstTeachers.DataTextField = "Name"
            RbLstTeachers.DataValueField = "ID"
            RbLstTeachers.DataSource = Ds.Tables(0).DefaultView
            RbLstTeachers.DataBind()
        End If
    End Sub

    Protected Sub RbLstTeachers_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
        StrCurSchool = RbLstTeachers.SelectedValue
    End Sub

    Protected Sub BtnAddStudents_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        Response.Write(StrCurSchool)
        Response.End()
   End Sub

[threenewbee]

使用session或者静态变量传值。

[ynduanlian]

public也不能在几次提交间保留上一次的值吗？

[threenewbee]

页面对象在不同的请求时已经不是同一个了。