Web Forms :: SelectionMode "Multi" On Listbox Control?

Jan 2, 2010

I have a databound listbox control that works fine but even though the selectionmode property is set to "multiple," the control still only lets the user select a single item in the list.

runat="server" [ code].....

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I'm trying to build a list box with MULTIPLE selections enabled

The markup is as shown below

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The listbox is being dynamically populated using


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&#65279;The script below is what i have done so far.

Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub lstContent_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstContent.SelectedIndexChanged
End Sub
Protected Sub lstSwapList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstSwapList.SelectedIndexChanged
End Sub
Protected Sub btnAddSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAddSwap.Click
Dim SwapValue As String = "Sixty Pounds"
Dim Counter As Integer = 8
Dim SwapN0 As Integer
lstSwapList.Items.Add(New ListItem("300", "1"))
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lstSwapList.Items.Add(New ListItem("Programming", "3"))
SwapN0 = lstSwapList.SelectedValue
For Counter = 0 To -1
SwapN0 = lstContent.Items.Count
End Sub
Protected Sub btnDeleteSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDeleteSwap.Click
End Sub
Protected Sub btnUpdateSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdateSwap.Click
End Sub
End Class

Sub UpdateSwap(ByVal valueA As String, ByVal ValueBAs String, ByVal ValueC As Integer, ByVal ValueD As Date)

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/APP1 (uses membership provider in /web.config, with userlist A)
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<asp:ListBox ID="mLbMoney" runat="server" Rows="15" AutoPostBack="True"

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Web Forms :: Get Multiple Selected Values From ListBox Control

Feb 25, 2016

using following code when i have selected multiple items only first item selected is "true" other selcted items are "false". How do i get all selected items "true".

sample.aspx source
<asp:ListBox ID="ddlCourse" runat="server" CssClass="form-control form-input "Width="200px" SelectionMode="Multiple">
sample.aspx.cs code


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