Bonjour,

J'ai une contrôle (qui simule un updatePanel) qui a été retravaillé dans une classe, et lorsqu'on appel la méthode refresh, qui fait un update de l'update panel. Je perd les contrôle ajoutés dynamiquement à "cUP" et je ne comprend pas pourquoi.
Voici la classe.

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.UI.WebControls;
using System.Web.UI;
using System.ComponentModel;
 
namespace Com.Marmara.Admin.KControls
{
    public enum MessageType { Information, Error }
 
    [Serializable]
    public class MessageItem
    {
        public MessageType Type { get; set; }
        public string Text { get; set; }
    }
 
 
    [ParseChildren(ChildrenAsProperties = true)]
    [PersistChildren(true)]
    public class KPanel : Control, INamingContainer
    {
 
 
        public List<MessageItem> MessageItems
        {
            get
            {
                if (ViewState["MessageItems"] == null) ViewState["MessageItems"] = new List<MessageItem>();
                return (List<MessageItem>)ViewState["MessageItems"];
            }
        }
 
        [TemplateContainer(typeof(KPanel))]
        [PersistenceMode(PersistenceMode.InnerProperty)]
        [TemplateInstance(TemplateInstance.Single)]
        public ITemplate Content { get; set; }
 
        public bool Show
        {
            get
            {
                if (ViewState["Show"] == null) ViewState["Show"] = true;
                return (bool)ViewState["Show"];
            }
            set { ViewState["Show"] = value; }
        }
 
        public string TitleImageUrl
        {
            get { return (string)ViewState["TitleImageUrl"]; }
            set { ViewState["TitleImageUrl"] = value; }
        }
 
        public string TitleText
        {
            get { return (string)ViewState["TitleText"]; }
            set { ViewState["TitleText"] = value; }
        }
        public string Width
        {
            get { return (string)ViewState["Width"]; }
            set { ViewState["Width"] = value; }
        }
 
        public void AddMessageItem(string text, MessageType type)
        {
            MessageItems.Add(new MessageItem() { Text = text, Type = type });
        }
 
        private const string TitleImageID = "tI";
        private const string ContentPanelID = "cP";
        private const string TitlePanelID = "tP";
        private const string TitleLiteralID = "tL";
        private const string ContainerUpdatePanelID = "cUP";
        private const string TemplatePanelID = "tmP";
        private const string MessageContainerPanelID = "mCoP";
        private const string ContainerPanelID = "coP";
        private const string MessagePanelID = "mP";
        private const string MessageContentPanelID = "mCP";
 
        public void AddPostBackTriggerControlIds(params string[] controlIds)
        {
            foreach (string controlId in controlIds)
            {
                PostBackTrigger trigger = new PostBackTrigger();
                trigger.ControlID = controlId;
 
                ((UpdatePanel)FindControl(ContainerUpdatePanelID)).Triggers.Add(trigger);
            }
        }
 
        public void Refresh()
        {
            UpdatePanel cUp  = (UpdatePanel)FindControl(ContainerUpdatePanelID);
        }
 
        private void SetMessages()
        {
            Panel titlePanel = ((Panel)FindControl(TitlePanelID));
            Panel messageContainerPanel = ((Panel)FindControl(MessageContainerPanelID));
            messageContainerPanel.Style.Add("display", "none");
 
            foreach (MessageItem messageItem in MessageItems)
            {
                int messageIndex = MessageItems.IndexOf(messageItem);
 
                Panel messagePanel = new Panel();
                messagePanel.ID = MessagePanelID + "_" + messageIndex;
                messagePanel.CssClass = "ui-widget";
                messagePanel.Style.Add("margin", "1px 0 1px 0");
                messageContainerPanel.Controls.Add(messagePanel);
 
                Panel messageContentPanel = new Panel();
                messageContentPanel.ID = MessageContentPanelID + "_" + messageIndex;
 
                messagePanel.Controls.Add(messageContentPanel);
                messageContentPanel.Style.Add("position", "relative");
 
                if (messageItem.Type == MessageType.Information)
                {
                    messageContentPanel.CssClass = "ui-state-highlight";
                    messageContentPanel.Controls.Add(new LiteralControl("<img src=\"/css/images/icons/information-octagon.png\" alt=\"\" style=\"vertical-align:-4px;margin-right:3px;\" />"));
                }
                else if (messageItem.Type == MessageType.Error)
                {
                    messageContentPanel.CssClass = "ui-state-error";
                    messageContentPanel.Controls.Add(new LiteralControl("<img src=\"/css/images/icons/exclamation-red.png\" alt=\"\" style=\"vertical-align:-4px;margin-right:3px;\" />"));
                }
 
                messageContentPanel.Controls.Add(new LiteralControl(messageItem.Text));
                messageContentPanel.Controls.Add(new LiteralControl("<img src=\"/css/images/icons/cross-small.png\" class=\"msg-close-img\" onclick=\"KPanel.HideMessage(&quot;" + messageContainerPanel.ClientID + "&quot;,&quot;" + messagePanel.ClientID + "&quot;);\" alt=\"\" title=\"Effacer ce message\" />"));
            }
 
            if (MessageItems.Count > 1)
            {
                titlePanel.Controls.Add(new LiteralControl("<a id=\"" + messageContainerPanel.ClientID + "_closerBtn\" href=\"#\" onclick=\"KPanel.HideAllMessages(&quot;" + messageContainerPanel.ClientID + "&quot;, this);return false;\" style=\"display:none;position: absolute; font-weight: normal; right: 4px; top: 2px;\">Effacer les messages</a>"));
            }
        }
 
        private Panel GetTitlePanel()
        {
            Panel titlePanel = new Panel();
            titlePanel.ID = TitlePanelID;
            titlePanel.CssClass = "ui-widget-header ui-corner-top";
 
            Image titleImage = new Image();
            titleImage.ID = TitleImageID;
            titleImage.AlternateText = "";
            titleImage.Style.Add("vertical-align", "-4px");
            titleImage.Style.Add("margin-right", "3px");
            titlePanel.Controls.Add(titleImage);
 
            Literal titleLiteral = new Literal();
            titleLiteral.ID = TitleLiteralID;
            titlePanel.Controls.Add(titleLiteral);
 
            return titlePanel;
        }
 
        protected override void OnInit(EventArgs e)
        {
            if (Content != null)
                Content.InstantiateIn(((Panel)FindControl(TemplatePanelID)));
 
            MessageItems.Clear();
        }
 
        protected override void OnPreRender(EventArgs e)
        {
            ((Literal)FindControl(TitleLiteralID)).Text = TitleText;
 
            Image titleImage = ((Image)FindControl(TitleImageID));
 
            titleImage.ImageUrl = TitleImageUrl;
            titleImage.AlternateText = TitleText;
            titleImage.Visible = !String.IsNullOrEmpty(TitleImageUrl);
 
            bool showTitle = !String.IsNullOrEmpty(TitleText);
 
            Panel titlePanel = ((Panel)FindControl(TitlePanelID));
 
            titlePanel.Visible = showTitle;
 
            Panel contentPanel = ((Panel)FindControl(ContentPanelID));
 
            Panel containerPanel = ((Panel)FindControl(ContainerPanelID));
 
            if (showTitle)
                contentPanel.CssClass = "ui-widget-content ui-corner-bottom";
 
            else
                contentPanel.CssClass = "ui-widget-content ui-corner-all";
 
            containerPanel.Visible = Show;
 
            if (!string.IsNullOrEmpty(Width))
            {
                contentPanel.Width = new Unit(Width);
                containerPanel.Width = new Unit(Width);
                titlePanel.Width = new Unit(Width);
            }
 
            SetMessages();
        }
 
 
        protected override void Render(HtmlTextWriter writer)
        {
            base.Render(writer);
 
            Panel messageContainerPanel = ((Panel)FindControl(MessageContainerPanelID));
 
            string msgFaderScript = "setTimeout(\"$('#" + messageContainerPanel.ClientID + "').fadeOut('slow');\", 4000);";
            // ScriptManager.RegisterStartupScript(this, GetType(), ClientID + "_MessageFaderScript", msgFaderScript, true);
 
            if (MessageItems.Count > 0)
            {
                ScriptManager.RegisterStartupScript(Page, GetType(), ClientID + "_ShowMsgScript", "$('#" + messageContainerPanel.ClientID + "').slideDown(500,function(){$('#" + messageContainerPanel.ClientID + "_closerBtn').fadeIn();});", true);
            }
        }
 
 
        private Panel GetContentPanel()
        {
            Panel contentPanel = new Panel();
            contentPanel.ID = ContentPanelID;
            contentPanel.Style.Add("position", "relative");
 
 
            Panel templatePanel = new Panel();
            templatePanel.ID = TemplatePanelID;
            templatePanel.Style.Add("margin", "3px");
            templatePanel.Style.Add("position", "relative");
            contentPanel.Controls.Add(templatePanel);
 
            return contentPanel;
        }
 
 
        protected override void CreateChildControls()
        {
            base.Controls.Clear();
 
            UpdatePanel containerUpdatePanel = new UpdatePanel();
            containerUpdatePanel.ID = ContainerUpdatePanelID;
            containerUpdatePanel.ChildrenAsTriggers = false;
            containerUpdatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
            base.Controls.Add(containerUpdatePanel);
 
            Panel containerPanel = new Panel();
            containerPanel.ID = ContainerPanelID;
            containerPanel.CssClass = "ui-widget";
            containerPanel.Style.Add("margin", "3px");
            containerPanel.Style.Add("position", "relative");
            containerUpdatePanel.ContentTemplateContainer.Controls.Add(containerPanel);
 
            containerPanel.Controls.Add(GetTitlePanel());
 
            Panel messageContainerPanel = new Panel();
            messageContainerPanel.ID = MessageContainerPanelID;
            messageContainerPanel.Style.Add("position", "relative");
 
            containerPanel.Controls.Add(messageContainerPanel);
 
            containerPanel.Controls.Add(GetContentPanel());
        }
 
    }
}