[Solved] Adjusting width for RadComboBox if additional image is present

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ComboBox
Sunil
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Sunil asked on 05 Feb 2026, 05:57 PM

Hi , 

I’m working on aligning the loading dropdown that renders under rcbSlide with the width of the RadComboBox, even when an additional icon is present. Since rcbSlide resides outside the RadComboBox container, I need guidance on how to ensure the dropdown inherits or matches the RadComboBox width consistently.

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Vasko
Telerik team
answered on 09 Feb 2026, 09:35 AM

Hello Sunil,

Thank you for the provided screenshot. 

For this particular scenario I suggest you take a look at our DropDown Configurator demo where you can try to configure the DropDown to your liking. If it is not helpful to you, could you please share a sample markup for the ComboBox so I can examine it and give a more precise answer.

    Regards,
    Vasko
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    Sunil
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    commented on 10 Feb 2026, 09:19 AM | edited

    Hi Vasko , 

    Please find the markup below. 

    <div class="rcbSlide">
      <div id="dropdown_container" class="combo-dropdown radcombo_outlook" style="width: 170px; height: 420px;">
        <div class="combo-scroll">
          <ul class="combo-list" style="width: 170px;"></ul>
        </div>
      </div>
    </div>

    <table style="width: 100%;">
      <tbody>
        <tr class="custom-padding">
          <td style="padding-right: 0; width: 100%;">
            <div id="auto_complete_d" class="auto-complete-control" data-member="DisplayText">
              <table class="auto-complete" border="0">
                <tbody>
                  <tr>
                    <td style="padding: 0;">
                      <div id="d_combo" class="combo-box outlook" style="width: 100%; white-space: normal;">
                        <table class="combo-input" style="width: 100%; border-collapse: collapse;">
                          <tbody>
                            <tr>
                              <td class="combo-input-cell" style="width: 100%;">
                                <input
                                  id="d_combo_input"
                                  class="combo-input prevent-decorate empty-message"
                                  type="text"
                                  value="No selection"
                                  autocomplete="off" />
                              </td>
                              <td class="combo-arrow-cell combo-arrow-hidden"></td>
                            </tr>
                          </tbody>
                        </table>
                        <input id="d_combo_state" type="hidden" value="{&quot;items&quot;:[],&quot;value&quot;:&quot;&quot;}" />
                      </div>
                    </td>
                    <td style="width: 21px; padding: 0;">
                      <button id="d_search_button" class="auto-complete-search-icon" type="button"></button>
                    </td>
                  </tr>
                </tbody>
              </table>
            </div>
          </td>
          <td style="width: 2px; padding: 0;"></td>
        </tr>
      </tbody>
    </table>

    Best Regards,

    Sunil Shankar S R

    Vasko
    Telerik team
    commented on 13 Feb 2026, 06:38 AM

    Hello Sunil,

    Thank you for the provided HTML render markup, however, what I meant was markup was the ASPX page (ComboBox markup), not what is rendered in the end.

    <telerik:RadComboBox ID="RadComboBox1" runat="server" RenderMode="Lightweight">
        <Items>
            <telerik:RadComboBoxItem Text="Item 1" />
            <telerik:RadComboBoxItem Text="Item 2" />
            <telerik:RadComboBoxItem Text="Item 3" />
            <telerik:RadComboBoxItem Text="Item 4" />
        </Items>
    </telerik:RadComboBox>
    

      Please share with me the ComboBox markup so I can assist you further.

      Regards,
      Vasko
      Progress Telerik

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