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我試圖動態創建ajax選項卡並將其ID存儲在會話中。我收到錯誤「指定的參數超出了有效值的範圍。 參數名稱：值」。我可以通過調用點擊按鈕事件來創建第一個選項卡。當我點擊按鈕並在第二次嘗試時調用相同的事件...我得到錯誤。似乎我引用了不再定義或包含在會話中的選項卡ID或容器\選項卡？Ajax選項卡錯誤指定的參數超出了有效值的範圍。參數名稱：值
我對此進行了深入研究，似乎無法找到答案。任何幫助將不勝感激。
我在asp頁面上有正確的腳本管理器和程序集引用。這裏是asp代碼和snippet背後的代碼。
<div>
<asp:Button ID ="AddTab" Text="Add Tab" OnClick = "addTab_Click" runat="server"/>
<AjaxToolkit:TabContainer ID="TabContainerContent" runat="server" Height="150px" BackColor="White" AutoPostBack="True"
OnActiveTabChanged="TabContainerContent_OnActiveTabChanged" >
</AjaxToolkit:TabContainer>
<asp:Label ID="currentTabIndex" runat="server"></asp:Label>
</div>
</td>
代碼隱藏
private List<string> dynamicTabIDs;
protected void Page_Init(Object sender, EventArgs e)
{
if (Session["dynamicTabIDs"] != null)
{
dynamicTabIDs = (List<string>)Session["dynamicTabIDs"];
foreach (string tabID in dynamicTabIDs)
{
AjaxControlToolkit.TabPanel tab = new AjaxControlToolkit.TabPanel();
tab.ID = tabID;
tab.HeaderText = "Tab " + (TabContainerContent.Tabs.Count + 1).ToString();
Label tabContent = new Label();
tabContent.ID = "lbl_tab_" + TabContainerContent.Tabs.Count.ToString();
tabContent.Text = "Tab " + (TabContainerContent.Tabs.Count + 1).ToString();
tab.Controls.Add(tabContent);
TabContainerContent.Tabs.Add(tab);
}
}//end if
else
{
dynamicTabIDs = new List<string>();
}
}
protected void Page_PreRender(object sender, EventArgs e)
{
Session["dynamicTabIDs"] = dynamicTabIDs;
}
protected void TabContainerContent_OnActiveTabChanged(object sender, EventArgs e)
{
currentTabIndex.Text = TabContainerContent.ActiveTab.ID;
}
public void addTab_Click(object sender, EventArgs e)
{
AjaxControlToolkit.TabPanel tab = new AjaxControlToolkit.TabPanel();
tab.ID = "tab" + Convert.ToString(TabContainerContent.Tabs.Count);
tab.HeaderText = "Tab " + (TabContainerContent.Tabs.Count + 1).ToString();
Label tabContent = new Label();
tabContent.ID = "lbl_tab_" + TabContainerContent.Tabs.Count.ToString();
tabContent.Text = "Tab " + (TabContainerContent.Tabs.Count + 1).ToString();
tab.Controls.Add(tabContent);
TabContainerContent.Tabs.Add(tab);
TabContainerContent.ActiveTab = tab;
dynamicTabIDs.Add(tab.ID);
}