怎么实现动态生成控件，然后获取值

求助如何实现动态生成控件，然后获取值
现在项目需要一个动态生成表单的功能

我一开始的实现如下
.aspx文件生成表单代码块

<table>


            <asp:Repeater ID="BrandList" runat="server">

                <ItemTemplate>

                    <tr>

                        <th>

                         <%#Eval("t_name") %>:

                        </th>

                                          <td>

                      <%#Eval("TypeName")%> : <%#out_table(int.Parse(Eval("Id").ToString()),

                      Eval("t_name").ToString(),Eval("inputType").ToString(),

                      Eval("xuanxiang").ToString(),

                      int.Parse(Eval("required").ToString()))%>

                        </td>

 

                    </tr>

                </ItemTemplate>

            </asp:Repeater>

    </table>

.aspx.cs文件生成表单代码块

protected void Page_Load(object sender, EventArgs e)

    {

        

        thisGod = this;

        if (!IsPostBack)

        {

            if (!string.IsNullOrEmpty(Request.QueryString["id"].ToString()))

            {

                //int TypeId = setid();

                //box.TypeId = TypeId;

                //box.createTime = DateTime.Now;

                string wheresql = "TypeId = " + TypeId.ToString();

                this.BrandList.DataSource = DAL.tableType.GetList(wheresql);

                this.BrandList.DataBind();

            }

        }

    }


    public string out_table(int ControlId, string t_name, string inputType, string xuanxiang,int required)

    {

        box.List.Add(new tableBase() { name = (t_name +"_"+ ControlId.ToString()),Value  = "",ControlId = ControlId});

        string inputstring = "";

        if (inputType == "text")

        {

            inputstring = "<input id=\"" + t_name + "_" + ControlId + "\""  + " type=\"text\" runat=\"server\" ";

            if (required == 1) 

            {

                inputstring += "required=\"required\" ";

            }

            inputstring += "/>";

            

        }

        if (inputType == "textarea")