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我有一个 C# Multiview，每次单击最后一个菜单项时都会出现错误并停止在 Visual Studio 2010 中运行。错误是“ActiveViewIndex 被设置为“8”。它必须小于当前视图控件的数量“8”。对于动态添加的视图，请确保在 Page_PreInit 事件之前或中添加它们。

代码

<div>
<asp:Menu ID="Menu1" runat="server" OnMenuItemClick="Menu1_MenuItemClick" Orientation="Horizontal" style="left: 0px; position: relative; top: 18px; font-family:Arial;" Height="38px" Width="800px" >
    <StaticMenuStyle HorizontalPadding="0px" VerticalPadding="0px" />
    <StaticSelectedStyle BackColor="#EAEAEA" BorderColor="#000000" />
        <Items>
            <asp:MenuItem Text="about us" Value="0" Selected="True"></asp:MenuItem>
            <asp:MenuItem Text="events" Value="1"></asp:MenuItem>
            <asp:MenuItem Text="contact us" Value="2"></asp:MenuItem>
            <asp:MenuItem Text="patio" Value="3"></asp:MenuItem>
            <asp:MenuItem Text="customers" Value="4"></asp:MenuItem>
            <asp:MenuItem Text="family" Value="5"></asp:MenuItem>
            <asp:MenuItem Text="swans" Value="6"></asp:MenuItem>
            <asp:MenuItem Text="swim" Value="7"></asp:MenuItem>
            <asp:MenuItem Text="bonus" Value="8"></asp:MenuItem>
        </Items>
    <StaticHoverStyle BackColor="Silver" />
    <StaticMenuItemStyle BorderColor="#EAEAEA" BorderStyle="Solid" BorderWidth="1px" />
</asp:Menu>
</div>
<div style="width: 800px; height: 450px; background-color: #EAEAEA; border:1px solid #000000; padding:10px 10px 0px 10px; font-family: Arial;" >
    <asp:MultiView ID="MultiView1" runat="server">
          <asp:View ID="View1" runat="server"></asp:View>
<asp:View ID="View2" runat="server"></asp:View>
<asp:View ID="View3" runat="server"></asp:View>
<asp:View ID="View4" runat="server"></asp:View>
<asp:View ID="View5" runat="server"></asp:View>
<asp:View ID="View6" runat="server"></asp:View>
<asp:View ID="View7" runat="server"></asp:View>
<asp:View ID="View8" runat="server"></asp:View>
    </asp:MultiView>
</div>

代码背后

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
            MultiView1.ActiveViewIndex = 0;
     }

    protected void Menu1_MenuItemClick(object sender, MenuEventArgs e)
    {
        MultiView1.ActiveViewIndex = Int32.Parse(Menu1.SelectedValue);
    }

任何帮助都是超级骗子。

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1 回答 1

1

您有 9 个菜单项和 8 个视图

  MultiView1.ActiveViewIndex = 8

会失败，因为它ActiveViewIndex是从零开始的（正如您正确实施的那样）

您可以先评估 MultiView1.Views 的长度，然后设置 ActiveViewIndex

int index = Int32.Parse(Menu1.SelectedValue)

if (MultiView1.Views.Count >  index) 
{
    MultiView1.ActiveViewIndex = index
}

也许您应该检查 index 是否不-1大于或等于0.

于 2011-06-26T08:23:37.000 回答