Creating web server control

2 posts, 0 answers
  1. Tiago
    Tiago avatar
    1 posts
    Member since:
    May 2009

    Posted 05 Feb 2010 Link to this post


    When I create a Web Server Control with RadAjaxManager, RadAjaxLoadingPanel and RadGrid inside, all working properly, but if for example I change page on RadGrid, Ajax works fine, but on second time I change the page, Ajax stops working, and the third time I change page, Ajax works fine again...

    I don't understand why this append

    My code here...

    using System; 
    using System.Collections.Generic; 
    using System.ComponentModel; 
    using System.Linq; 
    using System.Text; 
    using System.Web; 
    using System.Web.UI; 
    using System.Web.UI.WebControls; 
    using Telerik.Web.UI; 
    using System.IO; 
    using System.Reflection; 
    using darwin.sadj.shared.core; 
    [assembly: WebResource("darwin.sadj.shared.ui.etiqueta.Imagens.delete.gif""image/gif")] 
    namespace darwin.sadj.shared.ui.etiqueta 
        [ToolboxData("<{0}:ListEtiqueta runat=server></{0}:ListEtiqueta>")] 
        public class ListEtiqueta : WebControl 
            private RadGrid gridEtiquetas { getset; } 
            private RadAjaxManager RadAjaxManager1 { getset; } 
            private RadAjaxLoadingPanel RadAjaxLoadingPanel1 { getset; } 
            protected override void OnInit(EventArgs e) 
                RadAjaxLoadingPanel1 = new RadAjaxLoadingPanel(); 
                RadAjaxLoadingPanel1.ID = this.ID + "_RadAjaxLoadingPanel"
                RadAjaxManager1 = new RadAjaxManager(); 
                RadAjaxManager1.ID = this.ID + "_RadAjaxManager"
                gridEtiquetas = new RadGrid(); 
                gridEtiquetas.ID = this.ID + "_gridEtiquetas"
                gridEtiquetas.NeedDataSource += new GridNeedDataSourceEventHandler(gridEtiquetas_NeedDataSource); 
                gridEtiquetas.ItemCommand += new GridCommandEventHandler(gridEtiquetas_ItemCommand); 
            protected override void RenderContents(HtmlTextWriter output) 
                if (this.Visible == true
            protected override void OnLoad(EventArgs e) 
                if (!this.Page.IsPostBack) 
                    GridBoundColumn colunaID = new GridBoundColumn(); 
                    colunaID.DataField = "Id"
                    colunaID.UniqueName = "Id"
                    colunaID.HeaderText = "Id"
                    GridBoundColumn colunaDescricao = new GridBoundColumn(); 
                    colunaDescricao.DataField = "Descricao"
                    colunaDescricao.UniqueName = "Descricao"
                    colunaDescricao.HeaderText = "Descrição"
                    GridButtonColumn colunaDelete = new GridButtonColumn(); 
                    colunaDelete.ButtonType = GridButtonColumnType.ImageButton; 
                    colunaDelete.CommandName = "Delete"
                    colunaDelete.ConfirmDialogType = GridConfirmDialogType.RadWindow; 
                    colunaDelete.ConfirmText = "Deseja apagar este registo?"
                    colunaDelete.ConfirmTitle = "Confirmação"
                    colunaDelete.ImageUrl = Page.ClientScript.GetWebResourceUrl(this.GetType(), "darwin.sadj.shared.ui.etiqueta.Imagens.delete.gif"); 
                    colunaDelete.Text = "Apagar"
                    colunaDelete.UniqueName = "colunaDelete"
                    colunaDelete.ItemStyle.Width = Unit.Pixel(22); 
                gridEtiquetas.AutoGenerateColumns = false
                gridEtiquetas.GridLines = GridLines.None; 
                gridEtiquetas.MasterTableView.AllowCustomPaging = true
                gridEtiquetas.MasterTableView.AllowPaging = true
                gridEtiquetas.MasterTableView.PagerStyle.Mode = GridPagerMode.NextPrev; 
                gridEtiquetas.MasterTableView.DataKeyNames = new string[] { "Id" }; 
                RadAjaxManager1.AjaxSettings.AddAjaxSetting(gridEtiquetas, gridEtiquetas, RadAjaxLoadingPanel1); 
            protected void gridEtiquetas_NeedDataSource(object source, GridNeedDataSourceEventArgs e) 
                EtiquetaController controller = new EtiquetaController(); 
                int TotalRecords = 0; 
                ((RadGrid)source).DataSource = controller.getListEtiqueta(((RadGrid)source).MasterTableView.CurrentPageIndex, ((RadGrid)source).MasterTableView.PageSize, out TotalRecords); 
                ((RadGrid)source).MasterTableView.VirtualItemCount = TotalRecords; 
            protected void gridEtiquetas_ItemCommand(object source, GridCommandEventArgs e) 
                if (e.CommandName == "Delete"
                    EtiquetaController controller = new EtiquetaController(); 

  2. Nikolay Rusev
    Nikolay Rusev avatar
    2289 posts

    Posted 08 Feb 2010 Link to this post

    Hello Tiago,

    I am afraid that you cannot render RadAjaxManager as in your code. You  should simply call the base of RenderContents to have RadAjaxManager function properly.

    1.protected override void RenderContents(HtmlTextWriter output)
    3.   base.RenderContents(output);

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