C1TabControl to C1Tabs 2025v2 399

C1TabControl to C1Tabs 2025v2 399

Posted by: enrique.pv-ext on 30 June 2026, 5:01 am EST

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  enrique.pv-ext

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  Posted 30 June 2026, 5:01 am EST - Updated 30 June 2026, 6:30 am EST

  Hi,
  
  Migrate from 2010v1 to 2025v2 399 in ASP.NET WebForms NET Framework 4.8.1.
  
  Using C1Tabs from C1.Web.Wijmo.Controls.48.dll

  :C1.Web.Wijmo.Controls.C1Tabs.C1Tabs C1TabControl1;

  Now, this not compiles: **C1TabControl **

  SelectedIndex property dont exists now
  
  TabPages dont exists now
  
  Animation=“None” dont exists now ???

     ((C1TabPage)(C1TabControl1.TabPages[0])).Text = _textsShown[2].ToString();
     ((C1TabPage)(C1TabControl1.TabPages[1])).Text = _textsShown[3].ToString();

  I’ve added Pages node:

   <cc1:C1Tabs ID="C1TabControl1" runat="server" Height="500px"
          SelectedIndex="0"
          Width="100%" Animation="None">
           <Pages>
              <cc1:C1TabPage runat="server" Text="Details" ID="DetailsTab">
                  <uc6:CustomerData ID="CustomerData1" runat="server" />
              </cc1:C1TabPage>
              <cc1:C1TabPage runat="server" Text="Billing" ID="BillingTab">
                  <uc1:Billing ID="Billing1" runat="server" />
              </cc1:C1TabPage>

  any suggestions, please ? thanks a lot

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  kartik.dua

  

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  Posted 1 July 2026, 3:29 am EST

  Hi,

  Because the newer C1Tabs control was rebuilt from base, a few legacy properties were renamed or replaced. Here are the exact alternatives you need to resolve the compilation errors:

  1. SelectedIndex property is now Selected

  2. TabPages property is now Pages

  3. Animation=“None” is deprecated: Our suggestion is to simply remove this property entirely. The new control switches tabs instantly by default, which perfectly replicates the old Animation=“None” behavior.

  Best Regards,
  
  Kartik