ASP.NET

<questionnaire>
  <form>    
    <name>bob</name>
    <action>process/RunForm.aspx</action>
    <!--<action>process/hdlform.asp</action>-->
    <method>post</method>
  </form>
  <question>
    <text>Full Name?</text>
    <response>
      <control>
        <textbox>
          <datatype>
            <alpha>
              <minlength>5</minlength>
              <maxlength>30</maxlength>
            </alpha>
          </datatype>
          <prompt>Full Name</prompt>
          <required>true</required>
          <password>false</password>
          <default/>
          <name>fullname</name>
          <size>10</size>
          <maxlength>30</maxlength>
        </textbox>
      </control>
    </response>
  </question>
  <question>
    <text>Password</text>
    <response>
      <control>
        <textbox>
          <datatype>
            <any>
              <minlength>8</minlength>
              <maxlength>20</maxlength>
            </any>
          </datatype>
          <prompt>Password</prompt>
          <required>true</required>
          <password>true</password>
          <default/>
          <name>password</name>
          <size>10</size>
          <maxlength>20</maxlength>
        </textbox>
      </control>
    </response>
  </question>
  <question>
    <text>How many pints do you drink each week?</text>
    <response>
      <control>
        <textbox>
          <datatype>
            <numeric>
              <minvalue>0</minvalue>
              <maxvalue>120</maxvalue>
            </numeric>
          </datatype>
          <prompt>Pints Consumed</prompt>
          <required>true</required>
          <password>false</password>
          <default/>
          <name>pints</name>
          <size>3</size>
          <maxlength>3</maxlength>
        </textbox>
      </control>
    </response>
  </question>
  <question>
    <text>What is irony?</text>
    <response>
      <control>
        <textarea>
          <prompt>Describe Irony</prompt>
          <required>true</required>
          <default>explain</default>
          <name>irony</name>
          <cols>20</cols>
          <rows>4</rows>
        </textarea>
      </control>
    </response>
  </question>
  <question>
    <text>Date of birth?</text>
    <response>
      <control>
        <textbox>
          <datatype>
            <date>
              <format>dd/mmm/yyyy</format>
              <usecalendar>true</usecalendar>
              <separator>/</separator>
              <mindate>13/feb/1974</mindate>
              <maxdate>01/jan/2002</maxdate>
            </date>
          </datatype>
          <prompt>Date of birth</prompt>
          <required>false</required>
          <password>false</password>
          <default>dd/mmm/yyyy</default>
          <name>dateofbirth</name>
          <size>10</size>
          <maxlength>12</maxlength>
        </textbox>
      </control>
    </response>
  </question>
  <question>
    <text>Driving Licence?</text>
    <response>
      <control>
        <combo>
          <prompt>Driving License</prompt>
          <minselected>1</minselected>
          <maxselected>1</maxselected>
          <default/>
          <name>drivinglicense</name>
          <size>1</size>
          <item display="choose" value=""/>
          <item display="yes" value="1"/>
          <item display="no" value="0"/>
        </combo>
      </control>
    </response>
  </question>
  <question>
    <text>Which women do you like?</text>
    <response>
      <control>
        <radio>
          <prompt>Women</prompt>
          <required>true</required>
          <default/>
          <name>women</name>
          <item display="blondes" value="blondes"/>
          <item display="brunettes" value="brunettes"/>
          <item display="gingers" value="gingers"/>
        </radio>
      </control>
    </response>
  </question>
  <question>
    <text>Which cars do you like to drive?</text>
    <response>
      <control>
        <checkbox>
          <prompt>Cars</prompt>
          <name>cars</name>
          <minchecked>2</minchecked>
          <maxchecked>3</maxchecked>
          <item display="ford" value="ford"/>
          <item display="vauxhall" value="vauxhall"/>
          <item display="toyota" value="toyota"/>
          <item display="peugeot" value="peugeot"/>
        </checkbox>
      </control>
    </response>
  </question>
</questionnaire>

<asp:DropDownList ID="lb_Retour" name="drp_Retour" runat="server">
</asp:DropDownList> 
  
<asp:ListBox SelectionMode="Multiple" Height="160px" Width="300px" ID="lb_Info"
                                                    runat="server"></asp:ListBox>

protected void Page_Load(object sender, EventArgs e)
{
        lb_Retour.DataSource = Ctx.Retours.OrderBy(n => n.Id).Select(n => n);
        lb_Retour.DataTextField = "Retour";
        lb_Retour.DataValueField = "Id";
        lb_Retour.DataBind();
        lb_Retour.Items.Insert(0, new ListItem("-Selectionner-", "0"));

        lb_Retour.Attributes["onchange"] = "getValues(this);";
                        
}

<script type="text/javascript">
        function getValues(Control) {
            var Code = Control.value;
            if (Control.value.trim() != "")
                $.ajax({
                    type: "POST",
                    url: "../Services/DomaineService.asmx/GetResponse",
                    data: "{ 'typeId': '" + Code + "'}",
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: OnSuccess,
                    error: OnError

                });
        }
        function OnSuccess(data, status) {
            $('#ctl00_ContentPlaceHolder1_lb_Info').children().remove();
            $('#ctl00_ContentPlaceHolder1_lb_Info').append(data.d.ValueList);
         

        }
        function OnError(request, status, error) {
            alert(error.toString());
        }
 <script>

<option value="1">toto</option><option value="2">titi</option><option value="3">tata</option>

[WebMethod]
        public ResponseInfo GetResponse(string typeId)
        {
            ResponseInfo xResponse = new ResponseInfo();
            xResponse.ValueList ="";
            PDataContext Ctx = new PDataContext();

            var query = (from objInfo in Ctx.Infos
                         where objInfo.Type == Convert.ToInt32(typeId)
                         select objInfo
                                     );
            foreach (InfoComplementaire item in query.ToList())
                    {
                             xResponse.ValueList +="<option value=\""+item.Id.ToString()+"\">"+item.InfoComplementaire1.ToString()+"</option>";
                    }
            
            return xResponse;
        }