无法动态加载标签

我试图加载标签动态（使用AjaxToolKit）。首先，当我在页面加载命中button1，它加载tab1（工作好），当我打button2，itloads了tab2无法动态加载标签

所有这些标签是ASCX页。

在tab1我正在加载WebUserControl.ascx，这工作正常。

问题：

1）当你运行该代码，先点击button2，它不会加载tab2 dynamicaly但它确实，当你打button1首次。 2）重复点击button1或button2应该一次又一次地加载相同的标签，但它不会。 3）第三，主要问题是，我试着加载另一个.ascx loadtab2，它应该包含webparts。我应该能够将另一个自定义用户控件加载到这些Web部件中动态地加载。但我无法这样做。

任何人都可以帮助解决这些问题吗？

这里是我的代码：

Default.aspx的

<div>  
    <asp:AjaxScriptManager ID="AjaxScriptManager1" runat="server"> 
    </asp:AjaxScriptManager> 
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" 
     Text="Show Tab1" /> 
    <asp:Button ID="Button2" runat="server" onclick="Button2_Click" 
     Text="Show Tab2" /> 
    <asp:Button ID="Button3" runat="server" Text="Button" /> 
</div> 
<p> 
    <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder> 
</p>

Default.aspx.vb

Imports System 
Imports System.Linq 
Imports System.Web 
Imports System.Web.UI 
Imports System.Collections.Generic 
Imports System.Web.UI.WebControls 
Imports System.Collections 
Imports System.Collections.Specialized 
Imports AjaxControlToolkit 
Imports AjaxControlToolkit.ToolkitScriptManager 
Public Class _Default 
    Inherits System.Web.UI.Page 
    Dim tc1 As New TabContainer() 
    Dim uc1 As Control 
    Dim tp1 As New TabPanel() 
    Dim tp2 As New TabPanel() 
    Dim tp3 As New TabPanel() 
    Dim Wp1 As New WebPartManager() 

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
     'Page.PreRender += new EventHandler(Page_PreRender); 
     If Session("Tab1") <> Nothing Then 
      If Session("Tab1").ToString() = "true" Then 
       LoadTab1() 
      End If 
     ElseIf Session("Tab2") <> Nothing Then 
      If Session("Tab2").ToString() = "true" Then 
       LoadTab2() 
      End If 
     End If 
    End Sub 

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click 

     If Session("Tab1") Is Nothing Then 
      Session("Tab1") = "true" 
      LoadTab1() 
     ElseIf Session("Tab1").ToString() <> "true" Then 
      LoadTab1() 
     End If 
    End Sub 

    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button2.Click 
     If Session("Tab2") Is Nothing Then 
      Session("Tab2") = "true" 
      LoadTab2() 
     ElseIf Session("Tab2").ToString() <> "true" Then 
      LoadTab2() 
     End If 
    End Sub 
    Private Sub LoadTab1() 
     uc1 = LoadControl("WebUserControl.ascx") 
     tp1.HeaderText = "Tab1" 
     'tp2.HeaderText = "Tab2" 

     tp1.Controls.Add(uc1) 
     tc1.Tabs.Add(tp1) 
     'tc1.Tabs.Add(tp2) 


     If Session("Tab2") <> Nothing Then 
      LoadTab2() 
     End If 

     'if (Session["Tab2"] == null) 
     '{ 
     PlaceHolder1.Controls.Add(tc1) 
     '} 
    End Sub 

    Public Sub LoadTab2() 

     Dim uc2 As UserControl = CType(LoadControl("WebUserControl2.ascx"), UserControl) 
     uc2.ID = "control" 

     tp2.HeaderText = "Tab2" 
     tc1.Tabs.Add(tp2) 

     tp2.controls.add(uc2) 

(Error:A Zone can only be added to the Page in or before the Page_Init event...) 

End Sub

WebUserControl.ascx.vb

Protected Sub Page_Init() 
    Dim Btn As New Button() 
    Btn.ID = "TestButton" 

    Dim zone1 As New WebPartZone() 
    zone1.ID = "zone1" 
    Panel1.Controls.Add(zone1) 
    ' WebPart myWebPart = WebPartManager1.CreateWebPart(Btn); 
    'myWebPart.ID = "2"; 
    'myWebPart.Title = "MyWebPart"; 
    Dim uc As Control = Me.LoadControl("FeaturedControl.ascx") 
    uc.ID = "control" 
    Dim myWebPart As GenericWebPart = WebpartManager1.CreateWebPart(uc) 
    WebpartManager1.AddWebPart(myWebPart, zone1, 1) 
    'WebPartManager1.AddWebPart(controol, zone1, 1); 
End Sub

来源

2010-01-13 Grace Jones

尝试移动来自Page_Load（）的代码事件转入Page_Init（）事件

来源

2010-01-19 08:21:42

无法动态加载标签

回答

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