problem in renderening text in tabs at runtime

[Hiren]

I am generating tabs at runtime with close button for each tab,  when i select any item from dropdown then it generating tab with close button but without text, check the attached image. when i select another item from dropdown it adding text to already generated tab, but for the tab which is generated last not showing the text, how to solve the issue..

aspx.cs page

protected override void OnInit(EventArgs e)
 {
       RadTabStrip1.TabTemplate = new TabTemplate();
       base.OnInit(e);
 }
 protected void Page_Load(object sender, EventArgs e)
 {
       if (!Page.IsPostBack)
            BindUsers();
       RadTabStrip1.DataBind();
 }

 private void BindUsers()
{
 .  .. . . . .
}
protected void ddlUsers_SelectedIndexChanged(object sender, EventArgs e)
{
     if (ddlUsers.SelectedIndex != 0)
     {
          if (RadTabStrip1.Tabs.Count == 0)
          {
              RadTab Separator = new RadTab();
              Separator.IsSeparator = true;
              Separator.Width = Unit.Pixel(50);
              RadTabStrip1.Tabs.Add(Separator);
              RadTab tab1 = new RadTab(ddlUsers.SelectedItem.Text, ddlUsers.SelectedItem.Value);
              RadTabStrip1.Tabs.Add(tab1);
              RadTabStrip1.Tabs.FindTabByText(ddlUsers.SelectedItem.Text).Selected = true;
         }
        else if (RadTabStrip1.Tabs.Count > 0 && RadTabStrip1.FindTabByText(ddlUsers.SelectedItem.Text) == null)
        {
                    //RadTab Separator = new RadTab();
                    //Separator.IsSeparator = true;
                    //Separator.Width = Unit.Pixel(5);
                    //RadTabStrip1.Tabs.Add(Separator);

              RadTab tab1 = new RadTab(ddlUsers.SelectedItem.Text, ddlUsers.SelectedItem.Value);
              RadTabStrip1.Tabs.Add(tab1);
              RadTabStrip1.Tabs.FindTabByText(ddlUsers.SelectedItem.Text).Selected = true;
         }
        else
             RadTabStrip1.Tabs.FindTabByText(ddlUsers.SelectedItem.Text).Selected = true;
             GetDashboards(ddlUsers.SelectedItem.Text);
       }
      else
       {
           ddlDashboards.Items.Clear();
           ddlDashboards.DataSource = CreateEmptyDataTable();
           ddlDashboards.DataTextField = "DashboardTitle";
           ddlDashboards.DataValueField = "DashboardKey";
           ddlDashboards.DataBind();
       }
}

class file

class TabTemplate : ITemplate
    {
        public void InstantiateIn(Control container)
        {
            Label lbl = new Label();
            lbl.ID = "ItemLabel";
            //lbl.Text = "";
            lbl.DataBinding += new EventHandler(lbl_DataBinding);
            ImageButton ImgBtnClose = new ImageButton()
            {
                ImageUrl = "../../Images/delete1.gif",
                CssClass = "image"
            };
            ImgBtnClose.Click += new ImageClickEventHandler(ImgBtnClose_Click);
            ImgBtnClose.Attributes.Add("onclick", "return confirm('Do you want to close this tab.');");
            container.Controls.Add(lbl);
            container.Controls.Add(ImgBtnClose);
        }

        void ImgBtnClose_Click(object sender, ImageClickEventArgs e)
        {
            ImageButton target = (ImageButton)sender;
            RadTab tab = (RadTab)target.BindingContainer;
            RadTabStrip tabStrip = (RadTabStrip)tab.Parent;
            tabStrip.Tabs.Remove(tab);
        }

        private void lbl_DataBinding(object sender, EventArgs e)
        {
            Label target = (Label)sender;
            RadTab tab = (RadTab)target.BindingContainer;
            string tabText = (string)DataBinder.Eval(tab, "Text");
            target.Text = tabText;
        }
    }

[Kate]

Hello Giri,

I tried to run the code that you provided but with no success. Can you please open a support ticket and send us a runnable project containing only the minimum requirements to be able to see the issue, so we can help you out?

Regards,
Kate
the Telerik team

[Hiren]

Thanks for replying, i had resolved the issue

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {       }
        BindTabStripCloseButton();
    }

    private void BindTabStripCloseButton()
    {
        TextBoxTemplate template = new TextBoxTemplate();
        foreach (RadTab tab in RadTabStrip1.GetAllTabs())
        {
            template.InstantiateIn(tab);
        }
        RadTabStrip1.DataBind();
    }
    protected void ddlUsers_SelectedIndexChanged(object sender, EventArgs e)
        {
               if (RadTabStrip1.Tabs.Count == 0)
                {
                    //RadTab Separator = new RadTab();
                    //Separator.IsSeparator = true;
                    //Separator.Width = Unit.Pixel(50);
                    //RadTabStrip1.Tabs.Add(Separator);

                    RadTab tab1 = new RadTab(ddlUsers.SelectedItem.Text, ddlUsersSelectedItem.Value);
                    RadTabStrip1.Tabs.Add(tab1);
                    RadTabStrip1.Tabs.FindTabByText(ddlUsers.SelectedItem.Text).Selected = true;
                }
                else if (RadTabStrip1.Tabs.Count > 0 && RadTabStrip1.FindTabByText(ddlUsers.SelectedItem.Text) == null)
                {
                    //RadTab Separator = new RadTab();
                    //Separator.IsSeparator = true;
                    //Separator.Width = Unit.Pixel(5);
                    //RadTabStrip1.Tabs.Add(Separator);

                    RadTab tab1 = new RadTab(ddlUsers.SelectedItem.Text,ddlUsers.SelectedItem.Value);
                    RadTabStrip1.Tabs.Add(tab1);
                    RadTabStrip1.Tabs.FindTabByText(ddlUsers.SelectedItem.Text).Selected = true;
                    TabTemplate tbTemplate = new TabTemplate();
                    tbTemplate.InstantiateIn(tab1);
                    RadTabStrip1.DataBind();
                }
                else
                    RadTabStrip1.Tabs.FindTabByText(ddlUsers.SelectedItem.Text).Selected = true;
        }
}

class TextBoxTemplate : ITemplate
{
    public void InstantiateIn(Control container)
    {
        Label lbl = new Label();
        lbl.DataBinding += new EventHandler(lbl_DataBinding);
        ImageButton ImgbtnClose = new ImageButton()
        {
            ImageUrl = "Images/close_selected.png",
            CssClass = "image"
        };
        ImgbtnClose.Click += new ImageClickEventHandler(btnClose_Click);
        ImgbtnClose.Attributes.Add("onmouseover", "this.src='Images/close_hover.png'");
        ImgbtnClose.Attributes.Add("onclick", "return confirm('Do you want to close this tab.');");
        container.Controls.Add(lbl);
        container.Controls.Add(ImgbtnClose);
    }

    void btnClose_Click(object sender, ImageClickEventArgs e)
    {
        ImageButton target = sender as ImageButton;
        RadTab tab = target.BindingContainer as RadTab;
        RadTabStrip tabStrip = tab.Parent as RadTabStrip;
        tabStrip.Tabs.Remove(tab);
    }

    private void lbl_DataBinding(object sender, EventArgs e)
    {
        Label target = (Label)sender;
        RadTab tab = (RadTab)target.BindingContainer;
        string tabText = (string)DataBinder.Eval(tab, "Text");
        target.Text = tabText;
    }
}