RadTabStrip / RadMultiPage state lost when inside nested control in SharePoint web part

2 posts, 0 answers
  1. William Cook
    William Cook avatar
    5 posts
    Member since:
    Jun 2009

    Posted 21 Dec 2009 Link to this post

    Embedding a RadMultiPage / RadTabStrip directly into a SharePoint web part works fine, but for code organization I would like to nest them into a separate control. Once I do this, the control re-creation doesn't work (at least, not the ways I have tried it :)). Specifically, when the RadMultiPage / RadTabStrip are part of the WebPartWithTelerik class (which inherits from System.Web.UI.WebControls.WebParts.WebPart), the RadGrid controls on each page allow editing correctly; however, when they are moved down into the WebPartPanel class, clicking Edit on the RadGrid on either page causes the entire page to re-load, and the controls are not in edit mode as their state has been lost.

    Scenario:
    * RadTabStrip / RadMultiPage combo with two RadPageView objects.
    * Each RadPageView contains a single RadGrid which retrieves data via LinqToSql data sources.
    * MOSS web site using VSEWSS 1.3 to build the web part in VS 2008.

    I've tried a few iterations of this (attemping to serialize the container object, etc.) with no success. Here's hoping there's a simple fix out there.

    Thanks,

    William Cook

    using System;  
    using System.Runtime.InteropServices;  
    using System.Web.UI;  
    using System.Web.UI.WebControls;  
    using System.Web.UI.WebControls.WebParts;  
    using System.Xml.Serialization;  
     
    using Microsoft.SharePoint;  
    using Microsoft.SharePoint.WebControls;  
    using Microsoft.SharePoint.WebPartPages;  
     
    using Telerik.Web.UI;  
     
    namespace WebPartWithTelerik  
    {  
        [Guid("1d53c24d-161e-4fca-86b0-9a8f589e3ee9")]  
        public class WebPartWithTelerik : System.Web.UI.WebControls.WebParts.WebPart  
        {  
            private WebPartPanel Panel;  
            //{  
            //    get { return (WebPartPanel)ViewState["Panel"]; }  
            //    set { ViewState["Panel"] = value; }  
            //}  
     
            public WebPartWithTelerik()  
            {  
            }  
     
            protected override void CreateChildControls()  
            {  
                base.CreateChildControls();  
     
                // Add the controls to the page.  
                this.Panel = new WebPartPanel();  
                this.Controls.Add(this.Panel);  
            }  
        }  
     
        public class WebPartPanel : Panel  
        {  
            private Telerik.Web.UI.RadMultiPage MultiPage;  
            //{  
            //    get { return (RadMultiPage)ViewState["MultiPage"]; }  
            //    set { ViewState["MultiPage"] = value; }  
            //}  
            private Telerik.Web.UI.RadTabStrip TabStrip;  
            //{  
            //    get { return (RadTabStrip)ViewState["TabStrip"]; }  
            //    set { ViewState["TabStrip"] = value; }  
            //}  
     
            public WebPartPanel()  
            {  
                this.ID = "WebPartPanelID";  
            }  
     
     
            protected override void CreateChildControls()  
            {  
                base.CreateChildControls();  
     
                // Create a simple label to validate rendering of controls.  
                Label label = new Label();  
                label.Text = "Test web part for Telerik controls in a SharePoint web part.";  
                this.Controls.Add(label);  
     
                //this.ChildrenAsTriggers = true;  
                //this.UpdateMode = UpdatePanelUpdateMode.Conditional;  
     
                // Create two RadPageView objects.  
                RadPageView pageOne = new RadPageView();  
                pageOne.ID = "pageOne";  
                RadPageView pageTwo = new RadPageView();  
                pageTwo.ID = "pageTwo";  
     
                // Create the RadMultiPage object.  
                this.MultiPage = new RadMultiPage();  
                this.MultiPage.ID = "multiPage";  
                this.MultiPage.PageViewCreated += new RadMultiPageEventHandler(MultiPage_PageViewCreated);  
                this.MultiPage.PageViews.Add(pageOne);  
                this.MultiPage.PageViews.Add(pageTwo);  
     
                // Create the RadTab objects.  
                RadTab tabOne = new RadTab("One");  
                tabOne.PageViewID = pageOne.UniqueID;  
                RadTab tabTwo = new RadTab("Two");  
                tabTwo.PageViewID = pageTwo.UniqueID;  
     
                // Create the tabstrip.  
                this.TabStrip = new RadTabStrip();  
                this.TabStrip.ID = "tabStrip";  
                this.TabStrip.MultiPageID = this.MultiPage.UniqueID;  
                this.TabStrip.Tabs.Add(tabOne);  
                this.TabStrip.Tabs.Add(tabTwo);  
     
                // Add the controls to the page.  
                this.Controls.Add(this.TabStrip);  
                this.Controls.Add(this.MultiPage);  
            }  
     
            void MultiPage_PageViewCreated(object sender, RadMultiPageEventArgs e)  
            {  
                // Create a simple label to validate rendering of controls.  
                Label label = new Label();  
                label.Text = e.PageView.ID;  
                e.PageView.Controls.Add(label);  
     
                LinqDataSource dataSource = new LinqDataSource();  
                DataClassesDataContext context = new DataClassesDataContext();  
                dataSource.ContextTypeName = context.GetType().AssemblyQualifiedName; //"WebPartWithTelerik.DataClassesDataContext, WebPartWithTelerik, Version=1.0.0.0, Culture=neutral, PublicKeyToken=23df81aee7a34b62";  
                context.Dispose();  
                dataSource.EnableInsert = true;  
                dataSource.EnableUpdate = true;  
     
                // Create the grid for the page.  
                RadGrid grid = new RadGrid();  
                grid.AutoGenerateColumns = true;  
                grid.AutoGenerateEditColumn = true;  
                grid.AllowAutomaticInserts = true;  
                grid.AllowAutomaticUpdates = true;  
                grid.MasterTableView.DataKeyNames = new string[] { "TypeID" };  
                switch (e.PageView.ID)  
                {  
                    case "pageOne":  
                        //dataSource.ID = "dataSourceOne";  
                        dataSource.TableName = "TableOnes";  
                        grid.ID = "gridOne";  
                        grid.NeedDataSource += new GridNeedDataSourceEventHandler(grid_NeedDataSourceOne);  
                        break;  
                    case "pageTwo":  
                        //dataSource.ID = "dataSourceTwo";  
                        dataSource.TableName = "TableTwos";  
                        grid.ID = "gridTwo";  
                        grid.NeedDataSource += new GridNeedDataSourceEventHandler(grid_NeedDataSourceTwo);  
                        break;  
                }  
     
                // Bind the data source.  
                //dataSource.DataBind();  
                e.PageView.Controls.Add(dataSource);  
     
                // Add the grid to the PageView.  
                grid.DataSourceID = dataSource.UniqueID;  
                grid.MasterTableView.ID = grid.ID + "_MasterTableView";  
                e.PageView.Controls.Add(grid);  
            }  
     
            void grid_NeedDataSourceOne(object source, GridNeedDataSourceEventArgs e)  
            {  
                RadGrid grid = (RadGrid)source;  
                grid.DataSourceID = "dataSourceOne";  
            }  
            void grid_NeedDataSourceTwo(object source, GridNeedDataSourceEventArgs e)  
            {  
                RadGrid grid = (RadGrid)source;  
                grid.DataSourceID = "dataSourceTwo";  
            }  
        }  
    }  
     
  2. Nikolay Rusev
    Admin
    Nikolay Rusev avatar
    2289 posts

    Posted 28 Dec 2009 Link to this post

    Hello William,

    I suspect that RadGrid is not recreated on time on postback. Bellow links explains how you can create RadGrid programmatically:
    http://demos.telerik.com/aspnet-ajax/grid/examples/hierarchy/definingstructure/defaultcs.aspx
    http://demos.telerik.com/aspnet-ajax/grid/examples/programming/groupby/defaultcs.aspx

    I will suggest you create your control on Init event. This should solve the state issue.

    Kind regards,
    Nikolay
    the Telerik team

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