When I use asp:ListBox, it does not work

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XML

<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"/>

C#

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

}

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

Posted 10-Aug-11 20:39pm

rouruoshui

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janwel 15-Aug-11 1:36am

please mark solution if any of the answer below has solved your problem. thanks

4 solutions

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Mahendra.p25 · Answer 1 · 2011-08-10T20:42:00

Solution 1

set AutoPostBack="true"

Posted 10-Aug-11 20:42pm

Mahendra.p25

_Damian S_ · Answer 2 · 2011-08-10T20:43:00

Solution 2

ASP.NET

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

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

Posted 10-Aug-11 20:43pm

_Damian S_

v2

sujit0761 · Answer 3 · 2011-08-10T22:50:00

<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

rouruoshui · Answer 4 · 2011-08-14T15:38:00

Solution 5

Thanks for your help.
I am a enter.

Posted 14-Aug-11 15:38pm