i want to add listbox and dropdownlist in gridivew

<form id="form1" runat="server">
    <asp:ListBox ID="ListBox1" runat="server">
        <asp:ListItem Text="Ram" />
        <asp:ListItem Text="Suresh" />
        <asp:ListItem Text="Rajesh" />
    </asp:ListBox>
    <asp:ListBox ID="ListBox2" runat="server">
        <asp:ListItem Text="AFF" />
        <asp:ListItem Text="MFA" />
        <asp:ListItem Text="EFA" />
    </asp:ListBox>
    <asp:GridView ID="gridView" runat="server" AutoGenerateColumns="false">
        <Columns>
            <asp:BoundField HeaderText="Name" DataField="Name" />
            <asp:BoundField HeaderText="Branch" DataField="Branch" />
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:DropDownList ID="ddl" DataSource='<%# Bind("ddlsoruce") %>'   runat="server">
                    </asp:DropDownList>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>
    </form>

public partial class WebForm2 : System.Web.UI.Page
   {



       protected void Page_Load(object sender, EventArgs e)
       {
           if (!Page.IsPostBack)
           {
               List<Entity> lstSoruce = new List<Entity>();
               if (ListBox1.Items.Count == ListBox2.Items.Count)
               {
                   for (int i = 0; i < ListBox1.Items.Count; i++)
                   {
                       lstSoruce.Add(new Entity()
                       {
                           Name = ListBox1.Items[i].Text,
                           Branch = ListBox2.Items[i].Text,
                           ddlsoruce = ListBox1.Items.OfType<ListItem>().Select(k => k.Text).ToArray()
                       });


                   }
               }

               gridView.DataSource = lstSoruce;
               gridView.DataBind();



           }
       }

       class Entity
       {
           public string Name { get; set; }
           public string Branch { get; set; }
           public string[] ddlsoruce { get; set; }
       }




   }