AjaxPanel not updating a asp:Label properly

[Julian]

I have a radGrid that has inline Edit enabled. When the user clicks the inline Update link the RadGrid_UpdateCommand is triggered. Within that command I make a call to a PageValidate method. If this fails I'm trying to display a message to the screen via a ASP:Label. However the Label is not getting properly refreshed. I have created a button on the page and used the RadAjaxmanager to link the button to the label to test that the label does indeed get the proper value. However I need to ensure that when I click update and the validation fails that the error message is properly displayed (label is refreshed).

ASPX Code:

<rad:RadAjaxPanel ID="errorMessageAjaxPanel" EnableAJAX="true" runat="server">
        <asp:Label ID="errorMessageLabel" runat="server" Font-Bold="true" ForeColor="Red"></asp:Label>
    </rad:RadAjaxPanel>
    <asp:Button  ID="button" runat="server" />
    <table width="80%" style="margin-left: auto; margin-right: auto;" border="0">
        <tr>
            <td>
                <div style="float: left; margin: 5px 5px 10px 5px;">
                    Select Holiday Year:
                    <asp:DropDownList ID="holidayYear" AutoPostBack="true" runat="server" OnSelectedIndexChanged="holidayYear_SelectedIndexChanged">
                    </asp:DropDownList>
                    &nbsp
                </div>
            </td>
        </tr>
        <tr>
            <td>
                <rad:RadGrid ID="holidayRadGrid" AllowPaging="True" AllowSorting="True" GridLines="Horizontal"
                    HorizontalAlign="Center" ShowFooter="true" ShowStatusBar="true" EnableAJAX="true"
                    EnableAJAXLoadingTemplate="True" LoadingTemplateTransparency="25" AutoGenerateColumns="False"
                    Skin="Grid" SkinsPath="~/App_Themes/VertexDefault" OnNeedDataSource="holidayRadGrid_NeedDataSource"
                    OnUpdateCommand="holidayRadGrid_UpdateCommand"
                    PageSize="18" runat="server">
                    <MasterTableView DataKeyNames="HolidayID,HolidayYear,HolidayDate,HolidayName" EditMode="InPlace"
                        TableLayout="Auto" AllowNaturalSort="false" BorderColor="Black">
                        <Columns>
                            <rad:GridEditCommandColumn UniqueName="EditCommandColumn" HeaderStyle-Width="10px" />
                            <rad:GridBoundColumn HeaderStyle-Width="60px" DataField="HolidayName" HeaderText="Holiday"
                                SortExpression="HolidayName" UniqueName="HolidayName" ReadOnly="true" />
                            <rad:GridTemplateColumn HeaderStyle-Width="100px" DataField="HolidayDate" SortExpression="HolidayDate"
                                UniqueName="HolidayDate">
                                <ItemTemplate>
                                    <asp:Label ID="holidayDateLabel" Text='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? String.Empty : String.Format("{0:MM/dd/yyyy}", Eval("HolidayDate")) %>'
                                        runat="server" />
                                </ItemTemplate>
                                <EditItemTemplate>
                                    <asp:Calendar ID="holidayDateCalendar" SelectedDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>'
                                        VisibleDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>'
                                        runat="server" />
                                    <%--<rad:RadCalendar ID="holidayDateCalendar" AutoPostBack="false" EnableMultiSelect="false" SelectedDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>'  VisibleDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>' runat="server" />--%>
                                </EditItemTemplate>
                            </rad:GridTemplateColumn>
                            <rad:GridBoundColumn DataField="HolidayID" UniqueName="HolidayID" ReadOnly="true"
                                Display="false" />
                            <rad:GridBoundColumn DataField="HolidayYear" UniqueName="HolidayYear" ReadOnly="true"
                                Display="false" />
                        </Columns>
                    </MasterTableView>
                    <ClientSettings EnablePostBackOnRowClick="true">
                        <ClientEvents OnGridCreated="holidayRadGridCreated" OnRowContextMenu="holidayRadGridRowContextMenu" />
                    </ClientSettings>
                </rad:RadGrid>
                <br />
                <div>
                    <vtx:ImageHoverButton ID="cancelButton" PostBackUrl="~/Home.aspx" ImageUrl="~/App_Themes/VertexDefault/Images/CancelNormal.png"
                        CssClass="ImageHover" AlternateText="Search" runat="server" />
                </div>
            </td>
        </tr>
    </table>
    <asp:Panel ID="actionPanel" runat="server" Style="display: none" CssClass="modalPopup">
        <asp:Panel ID="titlePanel" CssClass="modalTitle" BackImageUrl="~/App_Themes/VertexDefault/Images/ModalTitleGradient.jpg"
            runat="server">
            <div>
                <table width="100%">
                    <tr>
                        <td style="width: 99%">
                            <asp:Label ID="titleLabel" Text="Change status" runat="server" />
                        </td>
                        <td align="right">
                            <asp:ImageButton ID="closeButton" AlternateText="Close" ImageUrl="~/App_Themes/VertexDefault/Images/Close.png"
                                runat="server" />
                        </td>
                    </tr>
                </table>
            </div>
        </asp:Panel>
        <div style="margin-top: 10px">
            Confirm delete of Holiday Date<br />
            <b>
                <asp:Label ID="lblHolidayDate" runat="Server" /></b>&nbsp;for Holiday: <b>
                    <asp:Label ID="lblHolidayName" runat="server" /></b>
            <input type="hidden" id="holidayIDHidden" runat="server" />
            <input type="hidden" id="holidayNameHidden" runat="server" />
            <input type="hidden" id="holidayYearHidden" runat="server" />
            <input type="hidden" id="holidayDateHidden" runat="server" />
            <input type="hidden" id="errorMessageHidden" runat="server" />
        </div>
        <br />
        <asp:Button ID="applyButton" Text="Apply" OnClick="applyButton_Click" runat="server" /><br />
        &nbsp;
    </asp:Panel>
    <asp:Button ID="hiddenButton" Style="display: none" runat="server" />
    <atk:ModalPopupExtender ID="actionPanelModalPopupExtender" BehaviorID="actionModalBehavior"
        PopupControlID="actionPanel" TargetControlID="hiddenButton" CancelControlID="closeButton"
        PopupDragHandleControlID="titlePanel" DropShadow="true" runat="server" />
    <rad:RadAjaxManager ID="ajaxManager" ClientEvents-OnResponseReceived="hideModalPopup()"
        runat="server">
        <AjaxSettings>
            <rad:AjaxSetting AjaxControlID="applyButton">
                <UpdatedControls>
                    <rad:AjaxUpdatedControl ControlID="applyButton" />
                    <rad:AjaxUpdatedControl ControlID="errorMessageLabel" />
                    <rad:AjaxUpdatedControl ControlID="holidayRadGrid" LoadingPanelID="holidayRadGridLoadingPanel" />
                </UpdatedControls>
            </rad:AjaxSetting>
            <rad:AjaxSetting AjaxControlID="button">
                <UpdatedControls>
                    <rad:AjaxUpdatedControl ControlID="errorMessageLabel" />
                </UpdatedControls>
            </rad:AjaxSetting>
        </AjaxSettings>
    </rad:RadAjaxManager>
    <rad:AjaxLoadingPanel ID="holidayRadGridLoadingPanel" runat="Server">
        <asp:Image ID="loadingImage" ImageUrl="~/App_Themes/VertexDefault/Grid/Loading.gif"
            AlternateText="Loading" BorderWidth="0px" runat="server" />
    </rad:AjaxLoadingPanel>
    <rad:RadMenu ID="gridContextRadMenu" IsContext="True" OnClientItemClicked="OnClientItemClickedHandler"
        ContextMenuElementID="none" Skin="Menu" SkinsPath="~/App_Themes/VertexDefault"
        runat="server">
        <Items>
            <rad:RadMenuItem Text="Delete the date for this Holiday?" Value="CS" />
        </Items>
    </rad:RadMenu>

C# Code:

protected void Page_Load(object sender, EventArgs e)
        {
            log.Debug("Page_Load");

            // Get current user and customer
            User user = Master.CurrentUser;
            Customer customer = GetCustomer(user);

            // Set year for page heading
            int holidayYearPlusOne = System.DateTime.Now.Year + 1;
            int holidayYearPlusTwo = System.DateTime.Now.Year + 2;

            lblHolidayYear.Text = System.DateTime.Now.Year.ToString();

            if (!IsPostBack)
            {
                int currentHolidayYear = Convert.ToInt32(DateTime.Now.ToString("yyyy"));

                // Populate filing year dropdown
                holidayYear.Items.Add(new ListItem(System.DateTime.Now.Year.ToString(), System.DateTime.Now.Year.ToString()));
                holidayYear.Items.Add(new ListItem(holidayYearPlusOne.ToString(), holidayYearPlusOne.ToString()));
                holidayYear.Items.Add(new ListItem(holidayYearPlusTwo.ToString(), holidayYearPlusTwo.ToString()));

                // Clear old data
                Session.Remove(Constants.Session.PageData);

                // Build data
                BuildTable(currentHolidayYear);
            }
            else
            {
                // Set year for page heading
                lblHolidayYear.Text = holidayYear.SelectedValue;

            }
            // Checks page security
            CheckPageSecurity(customer, user);
        }

        /// <summary>
        /// Handles the SelectedIndexChanged event of the holidayYear control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
        protected void holidayYear_SelectedIndexChanged(object sender, EventArgs e)
        {
            log.Debug("holidayYear_SelectedIndexChanged");

            if (returns == null)
            {
                // Create returns manager
                returns = ReturnsFactory.CreateReturns();
            }

            // Clear old data
            Session.Remove(Constants.Session.PageData);

            // Build data
            BuildTable(Convert.ToInt32(holidayYear.SelectedValue.ToString()));

            // Set year for page heading
            lblHolidayYear.Text = holidayYear.SelectedValue;

            // Clear out edit mode for items in grid
            holidayRadGrid.MasterTableView.ClearEditItems();
            holidayRadGrid.Rebind();
        }
        #endregion

        #region Private Methods
        /// <summary>
        /// Builds the table.
        /// </summary>
        private void BuildTable(int currentHolidayYear)
        {
            log.Debug("BuildTable");

            try
            {
                if (returns == null)
                {
                    // Create returns manager
                    returns = ReturnsFactory.CreateReturns();
                }

                // Clear out any errors that may have been displayed to the screen
                errorMessageLabel.Text = "";

                // Set 'Year'
                validDate = new DateTime(Convert.ToInt32(holidayYear.SelectedValue), DateTime.Now.Month, DateTime.Now.Day);

                // Fetch Holidays
                Holidays holidays = (Holidays)Session[Constants.Session.PageData];

                // Get Holidays if they are not already in the session
                if (holidays == null)
                {
                    holidays = returns.GetHolidays(currentHolidayYear);
                    Session[Constants.Session.PageData] = holidays;
                }

                holidayRadGrid.DataSource = holidays.Values;
                //holidayRadGrid.DataBind();

                if (errorMessageHidden.Value.Length > 0)
                {
                    errorMessageLabel.Text = errorMessageHidden.Value;
                }

                // Set correct year to be used for the column HolidayDate's Header Text
                holidayRadGrid.MasterTableView.GetColumn("HolidayDate").HeaderText = holidayYear.SelectedValue;
                //holidayRadGrid.Rebind();
            }
            catch (Exception ex)
            {
                log.Error("Error occurred in page '{0}'. Message: '{1}'", Request.Url.Segments[Request.Url.Segments.Length - 1], ex.Message);
                Response.Redirect(Constants.Pages.ErrorPage);
            }
        }

        /// <summary>
        /// Checks the page security.
        /// </summary>
        /// <param name="customer">The customer.</param>
        /// <param name="user">The user.</param>
        private void CheckPageSecurity(Customer customer, User user)
        {
            log.Debug("CheckPageSecurity");

            // Allow delete/delete?
            allowDelete = Master.CheckPageSecurity(customer, user, string.Format(@"{0}/Delete", AppRelativeVirtualPath)) == Permission.EditExecute;
        }

        /// <summary>
        /// Gets the customer.
        /// </summary>
        /// <param name="user">The user.</param>
        /// <returns></returns>
        private Customer GetCustomer(User user)
        {
            // Get current customer
            Customer customer = Master.CurrentCustomer;

            // Customer specified on the querystring?
            if (Request[Constants.QueryString.Customer] != null)
            {
                if (!Request[Constants.QueryString.Customer].Equals(customer.CustomerNumber, StringComparison.OrdinalIgnoreCase))
                {
                    if (returns == null)
                    {
                        // Create returns manager
                        returns = ReturnsFactory.CreateReturns();
                    }

                    // Only allowed to specify a different customer if we are a Vertex user
                    if (!returns.IsVertexUser(user))
                    {
                        // Log security violation
                        returns.LogSecurityViolation(user, string.Format("Attempt to access UserList.aspx with querystring '{0}'.", Request.QueryString));
                        Response.Redirect(Constants.Pages.HomePage);
                    }

                    // Get customer
                    customer = returns.GetCustomer(Request[Constants.QueryString.Customer]);
                }
            }
            return customer;
        }

        /// <summary>
        /// Handles the UpdateCommand event of the holidayRadGrid control.
        /// </summary>
        /// <param name="source">The source of the event.</param>
        /// <param name="e">The <see cref="Telerik.WebControls.GridCommandEventArgs"/> instance containing the event data.</param>
        protected void holidayRadGrid_UpdateCommand(object source, GridCommandEventArgs e)
        {
            GridEditableItem eeditedItem = e.Item as GridEditableItem;

            // Get current user and customer
            User user = Master.CurrentUser;

            try
            {
                if (returns == null)
                {
                    // Create returns manager
                    returns = ReturnsFactory.CreateReturns();
                }

                // Find controls in the edit item template
                GridEditableItem item = (GridEditableItem)e.Item;
                Calendar holidayDateCalendar = (Calendar) item.FindControl("holidayDateCalendar");

                // Validate input fields
                if (!ValidateInput(holidayDateCalendar.SelectedDate))
                {
                    holidayRadGrid.Rebind();

                    return;
                }

                // If the old value is equal to "1/1/0001 12:00:00 AM" then the a date for this holiday
                // has never been set.
                if ((DateTime)editedItem.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["HolidayDate"] == DateTime.MinValue)
                {
                    // INSERT
                    Holiday holiday = new Holiday();
                    holiday.HolidayDate = Convert.ToDateTime(holidayDateCalendar.SelectedDate);
                    holiday.HolidayYear = Convert.ToInt32(holidayYear.SelectedValue.ToString());
                    holiday.HolidayID = Convert.ToInt32(editedItem.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["HolidayID"].ToString());
                    returns.CreateHolidayDate(holiday, user.UserID);
                }
                else
                {
                    // UPDATE
                    Holiday holiday = new Holiday();
                    holiday.HolidayDate = Convert.ToDateTime(holidayDateCalendar.SelectedDate);
                    holiday.HolidayYear = Convert.ToInt32(holidayYear.SelectedValue.ToString());
                    holiday.HolidayID = Convert.ToInt32(editedItem.OwnerTableView.DataKeyValues[e.Item.ItemIndex]["HolidayID"].ToString());
                    returns.UpdateHolidayDate(holiday, user.UserID);
                }

                // Refresh grid
                holidayRadGrid.DataSource = returns.GetHolidays(Convert.ToInt32(holidayYear.SelectedValue.ToString())).Values;
                holidayRadGrid.Rebind();
                Response.Redirect(ReturnsConstants.Pages.HolidayListEdit);
            }

            catch (Exception ex)
            {
                // Log error
                log.Error("Error occurred in page '{0}'. Message: '{1}'", Request.Url.Segments[Request.Url.Segments.Length - 1], ex.Message);

                e.Canceled = true;
            }
        }

        //protected void holidayRadGrid_ItemDataBound(object sender, GridItemEventArgs e)
        //{
        //    log.Debug("holidayRadGrid_ItemCreated");


        //    if ((e.Item.ItemType == GridItemType.Item) || (e.Item.ItemType == GridItemType.AlternatingItem))
        //    {
        //        if (e.Item is GridEditableItem)
        //        {
        //            GridEditableItem item = (GridEditableItem) e.Item;
        //            Calendar holidayDateCalendar = (Calendar) item.FindControl("holidayDateCalendar");
        //            if (holidayDateCalendar != null)
        //            {
        //                holidayDateCalendar.SelectedDate = ValidDate;
        //                holidayDateCalendar.VisibleDate = ValidDate;
        //            }
        //        }
        //    }

        //}

        /// <summary>
        /// Handles the NeedDataSource event of the holidayRadGrid control.
        /// </summary>
        /// <param name="source">The source of the event.</param>
        /// <param name="e">The <see cref="Telerik.WebControls.GridNeedDataSourceEventArgs"/> instance containing the event data.</param>
        protected void holidayRadGrid_NeedDataSource(object source, GridNeedDataSourceEventArgs e)
        {
            log.Debug("holidayRadGrid");

            // Fetch holiday Dates
            //Holidays holidays = (Holidays)Session[Constants.Session.PageData];
            //holidayRadGrid.DataSource = holidays.Values;

            BuildTable(Convert.ToInt32(DateTime.Now.ToString("yyyy")));

            if (errorMessageHidden.Value.Length != 0)
            {
                errorMessageLabel.Text = errorMessageHidden.Value;
            }

        }

        /// <summary>
        /// Handles the Click event of the applyButton control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
        protected void applyButton_Click(object sender, EventArgs e)
        {
            log.Debug("applyButton_Click");

            try
            {

                if (returns == null)
                {
                    // Create returns factory
                    returns = ReturnsFactory.CreateReturns();
                }

                // Get update user details
                User user = Master.CurrentUser;

                // Delete holiday date for a specific holiday
                if (holidayDateHidden.Value.Length > 0)
                {
                    Holiday holiday = returns.GetHolidayDate(Convert.ToInt32(holidayIDHidden.Value.ToString()), Convert.ToInt32(holidayYearHidden.Value.ToString()), Convert.ToDateTime(holidayDateHidden.Value));
                    returns.DeleteHolidayDate(holiday, user.UserID);
                }
                else
                {
                    errorMessageLabel.Text = "You cannot delete an entry that has no date associated to it.";
                    //errorMessagePanel.Visible = true;
                }

                Holidays holidays = new Holidays();
                holidays = returns.GetHolidays(Convert.ToInt32(holidayYear.SelectedValue.ToString()));

                holidayRadGrid.DataSource = holidays.Values;
                holidayRadGrid.Rebind();

                // Store data
                Session[Constants.Session.PageData] = holidays;
            }
            catch (Exception ex)
            {
                log.Error("Error occurred in page '{0}'. Message: '{1}'", Request.Url.Segments[Request.Url.Segments.Length - 1], ex.Message);
                Response.Redirect(Constants.Pages.ErrorPage);
            }
        }

        private bool ValidateInput(DateTime holidayDate)
        {
            log.Debug("ValidateInput");

            // If page is not valid then let the client side show it's errors
            if (Page.IsValid)
            {
                // Re-validate page (in case client side validation did not work)
                Page.Validate();
            }

            // If page is not valid then let the client side show it's errors
            if (!Page.IsValid)
            {
                return false;
            }

            try
            {
                if (holidayDate.Year.ToString() != holidayYear.SelectedValue)
                {
                    errorMessageHidden.Value = string.Format("You must select a date that occurs within the currently selected year '{0}'.", holidayYear.SelectedValue);
                    Master.MessageBox.Show(string.Format("You must select a date that occurs within the currently selected year '{0}'.", holidayYear.SelectedValue), MessageBoxIcon.Error);
                    return false;
                }
            }

            catch (Exception ex)
            {
                log.Error("Error occurred in page '{0}'. Message: '{1}'", Request.Url.Segments[Request.Url.Segments.Length - 1], ex.Message);
                return false;
            }

            return true;

        }

        #endregion

        #region Properties
        /// <summary>
        /// Gets a value indicating whether [allow delete].
        /// </summary>
        /// <value><c>true</c> if [allow delete]; otherwise, <c>false</c>.</value>
        protected string AllowDelete
        {
            get { return allowDelete.ToString().ToLower(); }
        }

        /// <summary>
        /// Gets a value indicating whether [allow disable].
        /// </summary>
        /// <value><c>true</c> if [allow disable]; otherwise, <c>false</c>.</value>
        protected string AllowDisable
        {
            get { return allowDisable.ToString().ToLower(); }
        }

        /// <summary>
        /// Gets the valid date.
        /// </summary>
        /// <value>The valid date.</value>
        protected DateTime ValidDate
        {
            get { return validDate; }
        }
        #endregion


        #region Fields
        private bool allowDelete = true;
        private bool allowDisable = true;
        private IReturnsManager returns = null;
        private DateTime validDate;
        #endregion

Any help is greatly appreciated.

[SamJ]

Hi,

Try the following:
Diasbale grid built-in ajax, replace the RadAjaxPanel with ASP:Panel, then ajaxify the grid and the label through the RadAjaxManager on the page.

<asp:Panel ID="errorMessagePanel" runat="server">
        <asp:Label ID="errorMessageLabel" runat="server" Font-Bold="true" ForeColor="Red"></asp:Label>
    </asp:Panel>
    <asp:Button  ID="button" runat="server" />
    <table width="80%" style="margin-left: auto; margin-right: auto;" border="0">
        <tr>
            <td>
                <div style="float: left; margin: 5px 5px 10px 5px;">
                    Select Holiday Year:
                    <asp:DropDownList ID="holidayYear" AutoPostBack="true" runat="server" OnSelectedIndexChanged="holidayYear_SelectedIndexChanged">
                    </asp:DropDownList>
                    &nbsp
                </div>
            </td>
        </tr>
        <tr>
            <td>
                <rad:RadGrid ID="holidayRadGrid" AllowPaging="True" AllowSorting="True" GridLines="Horizontal"
                    HorizontalAlign="Center" ShowFooter="true" ShowStatusBar="true" EnableAJAX="false"
                    EnableAJAXLoadingTemplate="True" LoadingTemplateTransparency="25" AutoGenerateColumns="False"
                    Skin="Grid" SkinsPath="~/App_Themes/VertexDefault" OnNeedDataSource="holidayRadGrid_NeedDataSource"
                    OnUpdateCommand="holidayRadGrid_UpdateCommand"
                    PageSize="18" runat="server">
                    <MasterTableView DataKeyNames="HolidayID,HolidayYear,HolidayDate,HolidayName" EditMode="InPlace"
                        TableLayout="Auto" AllowNaturalSort="false" BorderColor="Black">
                        <Columns>
                            <rad:GridEditCommandColumn UniqueName="EditCommandColumn" HeaderStyle-Width="10px" />
                            <rad:GridBoundColumn HeaderStyle-Width="60px" DataField="HolidayName" HeaderText="Holiday"
                                SortExpression="HolidayName" UniqueName="HolidayName" ReadOnly="true" />
                            <rad:GridTemplateColumn HeaderStyle-Width="100px" DataField="HolidayDate" SortExpression="HolidayDate"
                                UniqueName="HolidayDate">
                                <ItemTemplate>
                                    <asp:Label ID="holidayDateLabel" Text='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? String.Empty : String.Format("{0:MM/dd/yyyy}", Eval("HolidayDate")) %>'
                                        runat="server" />
                                </ItemTemplate>
                                <EditItemTemplate>
                                    <asp:Calendar ID="holidayDateCalendar" SelectedDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>'
                                        VisibleDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>'
                                        runat="server" />
                                    <%--<rad:RadCalendar ID="holidayDateCalendar" AutoPostBack="false" EnableMultiSelect="false" SelectedDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>'  VisibleDate='<%# (DateTime) Eval("HolidayDate") == DateTime.MinValue ? ValidDate : Eval("HolidayDate") %>' runat="server" />--%>
                                </EditItemTemplate>
                            </rad:GridTemplateColumn>
                            <rad:GridBoundColumn DataField="HolidayID" UniqueName="HolidayID" ReadOnly="true"
                                Display="false" />
                            <rad:GridBoundColumn DataField="HolidayYear" UniqueName="HolidayYear" ReadOnly="true"
                                Display="false" />
                        </Columns>
                    </MasterTableView>
                    <ClientSettings EnablePostBackOnRowClick="true">
                        <ClientEvents OnGridCreated="holidayRadGridCreated" OnRowContextMenu="holidayRadGridRowContextMenu" />
                    </ClientSettings>
                </rad:RadGrid>
                <br />
                <div>
                    <vtx:ImageHoverButton ID="cancelButton" PostBackUrl="~/Home.aspx" ImageUrl="~/App_Themes/VertexDefault/Images/CancelNormal.png"
                        CssClass="ImageHover" AlternateText="Search" runat="server" />
                </div>
            </td>
        </tr>
    </table>
    <asp:Panel ID="actionPanel" runat="server" Style="display: none" CssClass="modalPopup">
        <asp:Panel ID="titlePanel" CssClass="modalTitle" BackImageUrl="~/App_Themes/VertexDefault/Images/ModalTitleGradient.jpg"
            runat="server">
            <div>
                <table width="100%">
                    <tr>
                        <td style="width: 99%">
                            <asp:Label ID="titleLabel" Text="Change status" runat="server" />
                        </td>
                        <td align="right">
                            <asp:ImageButton ID="closeButton" AlternateText="Close" ImageUrl="~/App_Themes/VertexDefault/Images/Close.png"
                                runat="server" />
                        </td>
                    </tr>
                </table>
            </div>
        </asp:Panel>
        <div style="margin-top: 10px">
            Confirm delete of Holiday Date<br />
            <b>
                <asp:Label ID="lblHolidayDate" runat="Server" /></b>&nbsp;for Holiday: <b>
                    <asp:Label ID="lblHolidayName" runat="server" /></b>
            <input type="hidden" id="holidayIDHidden" runat="server" />
            <input type="hidden" id="holidayNameHidden" runat="server" />
            <input type="hidden" id="holidayYearHidden" runat="server" />
            <input type="hidden" id="holidayDateHidden" runat="server" />
            <input type="hidden" id="errorMessageHidden" runat="server" />
        </div>
        <br />
        <asp:Button ID="applyButton" Text="Apply" OnClick="applyButton_Click" runat="server" /><br />
        &nbsp;
    </asp:Panel>
    <asp:Button ID="hiddenButton" Style="display: none" runat="server" />
    <atk:ModalPopupExtender ID="actionPanelModalPopupExtender" BehaviorID="actionModalBehavior"
        PopupControlID="actionPanel" TargetControlID="hiddenButton" CancelControlID="closeButton"
        PopupDragHandleControlID="titlePanel" DropShadow="true" runat="server" />
    <rad:RadAjaxManager ID="ajaxManager" ClientEvents-OnResponseReceived="hideModalPopup()"
        runat="server">
        <AjaxSettings>
            <rad:AjaxSetting AjaxControlID="holidayRadGrid">
                <UpdatedControls>
                    <rad:AjaxUpdatedControl ControlID="holidayRadGrid" LoadingPanelID="holidayRadGridLoadingPanel" />
                    <rad:AjaxUpdatedControl ControlID="errorMessagePanel" />
                </UpdatedControls>
            </rad:AjaxSetting>
            <rad:AjaxSetting AjaxControlID="applyButton">
                <UpdatedControls>
                    <rad:AjaxUpdatedControl ControlID="applyButton" />
                    <rad:AjaxUpdatedControl ControlID="errorMessageLabel" />
                    <rad:AjaxUpdatedControl ControlID="holidayRadGrid" LoadingPanelID="holidayRadGridLoadingPanel" />
                </UpdatedControls>
            </rad:AjaxSetting>
            <rad:AjaxSetting AjaxControlID="button">
                <UpdatedControls>
                    <rad:AjaxUpdatedControl ControlID="errorMessageLabel" />
                </UpdatedControls>
            </rad:AjaxSetting>
        </AjaxSettings>
    </rad:RadAjaxManager>
    <rad:AjaxLoadingPanel ID="holidayRadGridLoadingPanel" runat="Server">
        <asp:Image ID="loadingImage" ImageUrl="~/App_Themes/VertexDefault/Grid/Loading.gif"
            AlternateText="Loading" BorderWidth="0px" runat="server" />
    </rad:AjaxLoadingPanel>
    <rad:RadMenu ID="gridContextRadMenu" IsContext="True" OnClientItemClicked="OnClientItemClickedHandler"
        ContextMenuElementID="none" Skin="Menu" SkinsPath="~/App_Themes/VertexDefault"
        runat="server">
        <Items>
            <rad:RadMenuItem Text="Delete the date for this Holiday?" Value="CS" />
        </Items>
    </rad:RadMenu>

I hope this helps.

[Julian]

The messageLabel still does not show. If I click the button control that is set to refresh the messageLabel (seen below) the messageLabel is then displayed with the proper error message.


<rad:AjaxSetting AjaxControlID="button">  
     <UpdatedControls>  
            <rad:AjaxUpdatedControl ControlID="errorMessageLabel" />  
     </UpdatedControls>  
</rad:AjaxSetting> 

[Iana Tsolova]

Hi Julian,

I prepared a sample project for you following your scenario. Please check it our and let me know how it works and what differs in your case.

All the best,
Iana
the Telerik team

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