C1Expander in 2025v2 399

C1Expander in 2025v2 399

Posted by: enrique.pv-ext on 11 May 2026, 7:37 am EST

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  enrique.pv-ext

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  Posted 11 May 2026, 7:37 am EST

  Hi,

  Migrate from 2010v1 to 2025v2 399 in ASP.NET WebForms NET Framework 4.8.1.

  Using C1Expander from C1.Web.Wijmo.Controls.48.dll

  My legacy code:

      <div id="filters" style=" background-color:Transparent; height:180px;  margin-top:40px;"  class="divcontent">
          <cc7:C1Expander ID="C1Expander1" runat="server" HeaderSize="" Height="" Width="100%" ExpandDirection="Bottom" Expanded="False" 
              UseEmbeddedVisualStyles="False" VisualStyle="Vista" VisualStylePath="~/VisualStyles">
              <Header>  <asp:Literal ID="filtersLiteral" Text="Filtros avanzados" runat="server"></asp:Literal>
              </Header>
              <Content>
                  <div id="tree1" class="" style="background-color:Transparent; float:left; margin-right:10px; margin-left:10px; height:500px; width: 300px">
                      <asp:UpdatePanel ID ="UpdataPanelTree1" runat="server">
                          <ContentTemplate>
                              <asp:Panel ID="Panel3" runat="server" ScrollBars="None" Height="100%" Width="100%"
                                  BackColor="Transparent" BorderWidth="1px" BorderStyle="None" BorderColor="Black" 
                                  EnableTheming="True">
                                ....
                              </asp:Panel>
                          </ContentTemplate>
                      </asp:UpdatePanel>
                  </div>
                  <div id="tree2" class="" style=" background-color:Transparent; float:left; margin-right:10px; height:500px; width: 400px">           
                      <asp:UpdatePanel ID ="UpdatePanelTree2" runat="server">
                          <ContentTemplate>         
                              <asp:Panel ID="Panel5" runat="server" ScrollBars="None" Height="90%" Width="100%" BackColor="Transparent" BorderWidth="1px" BorderStyle="None" BorderColor="Black" 
                                  EnableTheming="True">
                                  ..
                              </asp:Panel>
                          </ContentTemplate>
                      </asp:UpdatePanel>
                  </div>                

  any suggestions ? thanks all

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  uttkarsh.matiyal

  

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  Posted 12 May 2026, 5:28 am EST

  Hello Enrique,

  We are currently unable to identify the exact issue from the provided details. Could you please share more information about the behavior you are observing in 2025v2? For example:

  • Any compilation/runtime errors
  • Missing or deprecated properties
  • Rendering/layout differences compared to the older version
  • Client-side script issues, if any

  This will help us suggest the appropriate alternatives or migration approach for the newer versions.

  Meanwhile, please refer to the latest product documentation for updated APIs and implementation details:
  
  https://developer.mescius.com/componentone/docs/webforms/online-expander/overview.html

  Regards,
  
  Uttkarsh

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  enrique.pv-ext

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  Posted 14 May 2026, 7:16 am EST

  Dont exists those properties, alternatives ?

  UseEmbeddedVisualStyles="False" 
  VisualStyle="Vista" 
  VisualStylePath="~/VisualStyles"
  HeaderSize=""

  <cc7:C1Expander ID="C1Expander1" runat="server" Height="" Width="100%" ExpandDirection="Bottom" Expanded="False">

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  uttkarsh.matiyal

  

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  Posted 15 May 2026, 1:52 am EST

  Hello Enrique,

  The legacy styling properties such as VisualStylePath, UseEmbeddedVisualStyles and VisualStyle are no longer present or used. Now, you have to use CSS to style your control.
  
  Please refer to https://developer.mescius.com/componentone/docs/webforms/online-expander/expanderforaspnetwijmoappearance.html for more information.

  Regards,
  
  Uttkarsh.

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  uttkarsh.matiyal

  

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  Posted 15 May 2026, 2:04 am EST

  Hello Enrique,

  Similarly, to style Expander’s Header you’ll need to use CSS. We have created a sample application implementing the same for your reference: Expander_Sample.zip

  Regards,
  
  Uttkarsh.