当我使用asp:ListBox时，它不起作用 [英] When I use asp:ListBox, it does not work

问题描述

<asp:ListBox runat="server" ID="myListBox" OnSelectedIndexChanged="myListBox_SelectedIndexChanged" Height="102px"

    Width="102px" >
    <asp:ListItem Text="ListBox1" Value="MyListBoxa"></asp:ListItem>
    <asp:ListItem Text="ListBox2" Value="MyListBoxad"></asp:ListItem>
    <asp:ListItem Text="ListBox3" Value="MyListBoxf"></asp:ListItem>
    <asp:ListItem Text="ListBox4" Value="MyListBoxc"></asp:ListItem>
</asp:ListBox<asp:Label ID="Label1" runat="server" Text="Label"/>

protected void myListBox_SelectedIndexChanged(object sender, EventArgs e)
{
    //Response.Write(this.myListBox.SelectedItem.ToString());
    this.Label1.Text = "hello world";

}

当我在VM中运行该程序时，网页上没有任何内容.
你可以帮帮我吗? THS.

When I run this program in my VM, there is nothing in web page.
Could you help me? THS.

推荐答案

set AutoPostBack="true" 

</asp:ListBox<asp:Label ID="Label1"  runat="server" Text="Label"/> 

该行在ListBox之后缺少右括号.因此，这是格式错误的，可能根本无法使用.

This line is missing a closing bracket after ListBox. This is therefore malformed, and probably won''t work at all.

< asp:ListBox runat ="server" ID ="myListBox" OnSelectedIndexChanged ="myListBox_SelectedIndexChanged" Height ="102px "
宽度="102px">
< asp:ListItem Text ="ListBox1" Value ="MyListBoxa"></asp:ListItem>
< asp:ListItem Text ="ListBox2" Value ="MyListBoxad"></asp:ListItem>
< asp:ListItem Text ="ListBox3" Value ="MyListBoxf"></asp:ListItem>
< asp:ListItem Text ="ListBox4" Value ="MyListBoxc"></asp:ListItem>
</asp:ListBox>

< asp:标签ID ="Label1" runat =服务器" Text =标签"/>




您对列表框控件的结束标记不正确.请参考上面的代码以获取帮助.



希望对您有帮助

<asp:ListBox runat="server" ID="myListBox" OnSelectedIndexChanged="myListBox_SelectedIndexChanged" Height="102px"
Width="102px" >
<asp:ListItem Text="ListBox1" Value="MyListBoxa"></asp:ListItem>
<asp:ListItem Text="ListBox2" Value="MyListBoxad"></asp:ListItem>
<asp:ListItem Text="ListBox3" Value="MyListBoxf"></asp:ListItem>
<asp:ListItem Text="ListBox4" Value="MyListBoxc"></asp:ListItem>
</asp:ListBox>

<asp:Label ID="Label1" runat="server" Text="Label"/>




Your closing tag to listbox control was not proper.Refer the above code for help.



Hope this will help you

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