问一个动态加载用户控件的问题。

Question

aspx: 
<tr>
           <td style="width:200px;height:19px">
           </td>
           <td style="width:550px;height:19px;vertical-align:top;" align=left valign=top>
           <asp:PlaceHolder ID="MyControl" runat=server></asp:PlaceHolder>
           </td>
           </tr>
我现在在后台写的namespace JOL.Web
{
    public partial class CompanyInfo : System.Web.UI.Page
    {
        string PageID = "0";
        protected void Page_Load(object sender, EventArgs e)
        {
            if (Session["Company"] == null)
                JOL.Common.CommonFunction.MessageShow(Page, "请先等录系统!");
            if (!Page.IsPostBack)
            {
                ViewState["ComName"] = "曹云森";
            }
        }
        private void InitPage()
    {
        System.Web.UI.UserControl userControl;
        if (Request.Params["PageID"] != null)
            PageID = Request.Params["PageID"].ToString();
        switch(PageID)
       {
            case "0":
                UserControl = (JOL.Web.UserControl.PubJobInfo)LoadControl("~/UserControl/Company/PubJobInfo.ascx");
                break;        }    }
    }
加载一个用户控件
 namespace   JOL.Web.UserControl
{
    public partial class PubJobInfo : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
            }        }
        private void InitPage()
        {
            DataTable dt = new DataTable();
            dt = JOL.Logic.JobCategoryLogic.GetJobCategory(true);
            this.ddlCategory.DataSource = dt;
            if (dt.Rows.Count > 0)
            {
                this.ddlCategory.DataSource = dt;
                this.ddlCategory.DataValueField = "CategoryID";
                this.ddlCategory.DataTextField = "CategoryTxt";
                this.ddlCategory.DataBind();
            }
            this.ddlCategory.Items.Insert(0,new ListItem("请选择工作类别","0"));
            this.ddlCategory.SelectedIndex = 0;
            this.ddlJobType.Items.Insert(0, new ListItem("请选择工作类别", "0"));
            this.ddlJobType.SelectedIndex = 0;
        }
        protected void btnSave_Click(object sender, EventArgs e)
        {        }
        protected void ddlCategory_SelectedIndexChanged(object sender, EventArgs e)
        {        }
}
}
1。
               UserControl = (JOL.Web.UserControl.PubJobInfo)LoadControl("~/UserControl/Company/PubJobInfo.ascx");
                break;
，JOL.Web.UserControl.PubJobInfo没有联想功能2.错误 1 'JOL.Web.UserControl' is a 'namespace' but is used like a 'variable'
想请高手指点。

Answer 1

默认你这样添加的控件并没有加入到你的表单中
就是没有放在"runat=server"中,
这样程序是执行不了的,
建议在页面中放一下Panal控件,
然后加入控件到Panal中
if (Session["AdminLogin"] != null)
            {
                MAdminLogin user = (MAdminLogin)Session["AdminLogin"];
                string strQuanXian = user.sType ;
                if (strQuanXian == "3")
                {
                    Control c1 = LoadControl("/UserControls/cLeftNews.ascx");                    Page.Controls.Add(c1);
                    this.Panel1.Controls.Add(c1);                }
                else
                {
                    Control c1 = LoadControl("/UserControls/cLeft.ascx");                    Page.Controls.Add(c1);
                    this.Panel1.Controls.Add(c1);                }
                            }
这是我平时用的方法

Answer 2

动态的 UC必须 LoadControl
需要执行里边的公开方法的时候 LoadControl出来的CONTROL再转换成你需要的类型