Data Binding ASP.Net Tutorial

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  4. Selecting multiple list items (set SelectionMode to Multiple)
<%@ Page Language="C#" %>
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        foreach (ListItem item in lstProducts.Items)
            if (item.Selected)
                lblProduct.Text += "
  • " + item.Text;
        }



        Show Multiple ListBox


        
        

                id="lstProducts"
            DataSourceID="srcProducts"
            DataTextField="Title"
            DataValueField="Id"
            SelectionMode="Multiple"
            Runat="server" />
        
                id="btnSubmit"
            Text="Submit"
            OnClick="btnSubmit_Click"
            Runat="server" />
        
        
                id="lblProduct"
            EnableViewState="false"
            Runat="server" />
                id="srcProducts"
            SelectCommand="SELECT Id, Title FROM Products"
            ConnectionString="<%$ ConnectionStrings:Products %>"
            Runat="server" />
        

        


            
                
    File: Web.config

      
                 connectionString="Data Source=.\SQLEXPRESS;
             AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />