How do I... Multiple selection in dropdown

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How to do multiple selection in dropdownlist and display it in textbox.

What I have tried:

<asp:ListBox ID="lstSelect" runat="server" SelectionMode="Multiple">
<asp:ListItem Text="Mango" Value="1" />
<asp:ListItem Text="Apple" Value="2" />
<asp:ListItem Text="Banana" Value="3" />

Posted 30-Jul-16 22:06pm

Member 12662265

Updated 30-Jul-16 22:43pm

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Karthik_Mahalingam · Accepted Answer · 2016-07-30T22:43:00

try this

ASP.NET

<asp:ListBox ID="lstSelect" runat="server" SelectionMode="Multiple" AutoPostBack="true" OnSelectedIndexChanged="lstSelect_SelectedIndexChanged">
            <asp:ListItem Text="Mango" Value="1" />
            <asp:ListItem Text="Apple" Value="2" />
            <asp:ListItem Text="Banana" Value="3" />
        </asp:ListBox>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

C#

protected void lstSelect_SelectedIndexChanged(object sender, EventArgs e)
      {
          string items = "";
          foreach (ListItem item in lstSelect.Items)
              if (item.Selected)
                  items += item.Text + ",";
          TextBox1.Text = items.Trim().TrimEnd(','); ;
      }