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Editorial Team
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Asked: 2026-05-27T19:54:49+00:00

In my application I have a text box, dropdownlist and a checkboxlist. Now I

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In my application I have a text box, dropdownlist and a checkboxlist. Now I want the checkboxlist to display when I select the dropdown item. The list in the checkboxlist will depend on the item which I’m selecting from the dropdownlist.

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1 Answer

  1. Editorial Team

    You may use Dropdownlist selected index changed event for your selection changes.as well as checked list box Visible.

    Code Behind:

     Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
        If DropDownList1.SelectedIndex > 1 Then
            CheckBoxList1.Visible = True
            If DropDownList1.SelectedIndex = 2 Then
                'Put Your Code Here
            Else
                'Put Your Code Here
            End If
        Else
            CheckBoxList1.Visible = False
        End If
    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        CheckBoxList1.Visible = False
    End Sub

    Design:

    <asp:DropDownList ID="DropDownList1" runat="server" Height="48px" Width="256px" AutoPostBack="true"OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" >
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