Selected Index Changed event for asp:DropDownList (VB.net) : DropDownList « Asp Control « ASP.Net






  1. ASP.Net
  2. Asp Control
  3. DropDownList

Selected Index Changed event for asp:DropDownList (VB.net)

<%@ Page Language="VB" %>
<script runat="server">

    Sub DropDownList1_SelectedIndexChanged(sender As Object, e As EventArgs)
      Select Case DropDownList1.SelectedItem.Value
        Case 0: Label1.Text = String.Empty  ' Reset the Label1.Text
        Case 1: Label1.Text = "You got Grade E!"
        Case 2: Label1.Text = "You got Grade D!"
        Case 3: Label1.Text = "You got Grade C!"
        Case 4: Label1.Text = "You got Grade B!"
        Case 5: Label1.Text = "You got Grade A!"
      End Select
    End Sub

</script>
<html>
<head>
</head>
<body>
    <form runat="server">
        <p>
            <asp:DropDownList id="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                <asp:ListItem Value="0" Selected="True">- Please select a range of score -</asp:ListItem>
                <asp:ListItem Value="1">0 - 20</asp:ListItem>
                <asp:ListItem Value="2">21 - 40</asp:ListItem>
                <asp:ListItem Value="3">40 - 60</asp:ListItem>
                <asp:ListItem Value="4">61 - 80</asp:ListItem>
                <asp:ListItem Value="5">81 - 100</asp:ListItem>
            </asp:DropDownList>
        </p>
        <p>
            <asp:Label id="Label1" runat="server"></asp:Label>
        </p>
    </form>
</body>
</html>








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