[CLOSED] The control with ID 'MainContent_ctl69' not found

[Geenin]

I got the error message when I added MasterPageFile in the aspx file.

here is my code:

aspx

<asp:Content runat="server" ID="BodyContent" ContentPlaceHolderID="MainContent" >
.................
<ext:Portlet ID="PortletGroupView" runat="server" Layout="TableLayout" Closable="false" Draggable="false" Frame="false" Collapsible="false" Border="false">
<LayoutConfig>
<ext:TableLayoutConfig Columns="3" />
</LayoutConfig>
<Items>
</Items>
</ext:Portlet>
........................
</asp:Content>

C# Code

    public class GROUP_HOST
    {
        public String GROUP_NAME { get; set; }
        public String DURATION { get; set; }
        public String COUNT_OK { get; set; }
        public String COUNT_WARNING { get; set; }
        public String COUNT_NG { get; set; }
    }

    public partial class Default : System.Web.UI.Page
    {
        protected void Load_Group_View()
        {
            List<GROUP_HOST> ghlst = new List<GROUP_HOST>();
            for (int i = 1; i < 10; i++)
            {
                GROUP_HOST gh = new GROUP_HOST();
                gh.GROUP_NAME = "Group_" + i;
                gh.DURATION = i * 2 + "D" + 1 * i + "H" + 2 * i + "m";
                gh.COUNT_NG = 2 * i + "";
                gh.COUNT_OK = 3 * i + "";
                gh.COUNT_WARNING = 1 * i + "";
                ghlst.Add(gh);
            }
            foreach (GROUP_HOST gh in ghlst)
            {
                Ext.Net.Button btnOK = new Ext.Net.Button
                {
                    Scale = ButtonScale.Large,
                    Width = 50,
                    Cls = "btn-green",
                    Text = "<span style='color:while;'>"+gh.COUNT_OK+"</span>",
                    AutoDataBind = true
                };
                Ext.Net.Button btnWarning = new Ext.Net.Button
                {
                    Scale = ButtonScale.Large,
                    Width = 50,
                    Cls = "btn-yellow",
                    Text = "<span style='color:while;'>" + gh.COUNT_WARNING + "</span>",
                    AutoDataBind = true
                };
                Ext.Net.Button btnNG = new Ext.Net.Button
                {
                    Scale = ButtonScale.Large,
                    Width = 50,
                    Cls = "btn-red",
                    Text = "<span style='color:while;'>" + gh.COUNT_NG + "</span>",
                    AutoDataBind = true
                };

                btnOK.DirectEvents.Click.Event += GroupViewClick;
                btnWarning.DirectEvents.Click.Event += GroupViewClick;
                btnNG.DirectEvents.Click.Event += GroupViewClick;

                Ext.Net.Panel pn = new Ext.Net.Panel
                {
                    Title = gh.GROUP_NAME,
                    FrameHeader = true,
                    BodyPadding = 10,
                    Frame = true,
                    Width = 200,
                    Items = { 
                        new Ext.Net.Label{
                            Text = gh.DURATION,
                            Height = 100,
                            Width=100
                        },
                        new Container{
                            Items = {
                            btnOK,btnWarning,btnNG
                            }
                        }
                    }

                };
                this.PortletGroupView.Items.Add(pn);
            }
        }

        protected void GroupViewClick(object sender, EventArgs e)
        {
            String aaa = ((Ext.Net.Button)sender).Text;
        }
}

When I trigger the button click event, will get error "The control with ID 'MainContent_ctl69' not found".
but it was work when I didn't use MasterPageFile, please help, thanks a lot.

[Daniil]

Hi @Geenin,

Could you, please, clarify where the Load_Group_View method is being called?

[Geenin]

Hi @Geenin,

Could you, please, clarify where the Load_Group_View method is being called?

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                this.Load_Group_View();
            }
        }

It's called by Page_Load

Geenin

[Daniil]

Thanks.

but it was work when I didn't use MasterPageFile, please help, thanks a lot.

Even without a master page, if you created the Buttons under this condition

if (!IsPostBack)

then I would say it should not work.

A control's DirectEvent requires an instance of that control on client side. This condition

if (!IsPostBack)

means that you don't recreate the Buttons when a DirectEvent occurs.

Also I would suggest to set up IDs for the Buttons explicitly.

[Geenin]

Thanks.



Even without a master page, if you created the Buttons under this condition

if (!IsPostBack)

then I would say it should not work.

A control's DirectEvent requires an instance of that control on client side. This condition

if (!IsPostBack)

means that you don't recreate the Buttons when a DirectEvent occurs.

Also I would suggest to set up IDs for the Buttons explicitly.

Thanks Daniil ! It works... very appreciate....... :-)


Geenin