snipt

Ctrl+h for KB shortcuts

C#

Find active ItemsControl.ItemsPanel

/// <summary>
/// To get the active container, like pannel,canvas or grid from the items panel
/// </summary>
/// <param name="visual">ItemsControl</param>
/// <returns></returns>
public static object FindItemsPanel(Visual visual)
{
    for (int i = 0; i < VisualTreeHelper.GetChildrenCount(visual); i++)
    {
        Visual child = VisualTreeHelper.GetChild(visual, i) as Visual;
        if (child != null)
        {
            if (child is object && VisualTreeHelper.GetParent(child) is ItemsPresenter)
            {
                object temp = child;
                return (object)temp;
            }
            object panel = FindItemsPanel(child);
            if (panel != null)
            {
                object temp = panel;
                return (object)temp; // return the panel up the call stack
            }
        }
    }
    return default(object);
}


<ItemsControl>
	<ItemsControl.ItemsPanel>
		<ItemsPanelTemplate>
    		<StackPanel />
		</ItemsPanelTemplate>
	</ItemsControl.ItemsPanel>
</ItemsControl
https://snipt.net/embed/9444c2cebe488c6f1bb5730caf6b5a1f/
/raw/9444c2cebe488c6f1bb5730caf6b5a1f/
9444c2cebe488c6f1bb5730caf6b5a1f
csharp
C#
36
2019-06-26T12:13:39
True
False
False
Oct 23, 2013 at 05:53 AM
/api/public/snipt/89534/
find-active-itemscontrolitemspanel
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a> <a href="#L-28">28</a> <a href="#L-29">29</a> <a href="#L-30">30</a> <a href="#L-31">31</a> <a href="#L-32">32</a> <a href="#L-33">33</a> <a href="#L-34">34</a> <a href="#L-35">35</a> <a href="#L-36">36</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="c1">/// &lt;summary&gt;</span> </span><span id="L-2"><a name="L-2"></a><span class="c1">/// To get the active container, like pannel,canvas or grid from the items panel</span> </span><span id="L-3"><a name="L-3"></a><span class="c1">/// &lt;/summary&gt;</span> </span><span id="L-4"><a name="L-4"></a><span class="c1">/// &lt;param name=&quot;visual&quot;&gt;ItemsControl&lt;/param&gt;</span> </span><span id="L-5"><a name="L-5"></a><span class="c1">/// &lt;returns&gt;&lt;/returns&gt;</span> </span><span id="L-6"><a name="L-6"></a><span class="k">public</span> <span class="k">static</span> <span class="kt">object</span> <span class="nf">FindItemsPanel</span><span class="p">(</span><span class="n">Visual</span> <span class="n">visual</span><span class="p">)</span> </span><span id="L-7"><a name="L-7"></a><span class="p">{</span> </span><span id="L-8"><a name="L-8"></a> <span class="k">for</span> <span class="p">(</span><span class="kt">int</span> <span class="n">i</span> <span class="p">=</span> <span class="m">0</span><span class="p">;</span> <span class="n">i</span> <span class="p">&lt;</span> <span class="n">VisualTreeHelper</span><span class="p">.</span><span class="n">GetChildrenCount</span><span class="p">(</span><span class="n">visual</span><span class="p">);</span> <span class="n">i</span><span class="p">++)</span> </span><span id="L-9"><a name="L-9"></a> <span class="p">{</span> </span><span id="L-10"><a name="L-10"></a> <span class="n">Visual</span> <span class="n">child</span> <span class="p">=</span> <span class="n">VisualTreeHelper</span><span class="p">.</span><span class="n">GetChild</span><span class="p">(</span><span class="n">visual</span><span class="p">,</span> <span class="n">i</span><span class="p">)</span> <span class="k">as</span> <span class="n">Visual</span><span class="p">;</span> </span><span id="L-11"><a name="L-11"></a> <span class="k">if</span> <span class="p">(</span><span class="n">child</span> <span class="p">!=</span> <span class="k">null</span><span class="p">)</span> </span><span id="L-12"><a name="L-12"></a> <span class="p">{</span> </span><span id="L-13"><a name="L-13"></a> <span class="k">if</span> <span class="p">(</span><span class="n">child</span> <span class="k">is</span> <span class="kt">object</span> <span class="p">&amp;&amp;</span> <span class="n">VisualTreeHelper</span><span class="p">.</span><span class="n">GetParent</span><span class="p">(</span><span class="n">child</span><span class="p">)</span> <span class="k">is</span> <span class="n">ItemsPresenter</span><span class="p">)</span> </span><span id="L-14"><a name="L-14"></a> <span class="p">{</span> </span><span id="L-15"><a name="L-15"></a> <span class="kt">object</span> <span class="n">temp</span> <span class="p">=</span> <span class="n">child</span><span class="p">;</span> </span><span id="L-16"><a name="L-16"></a> <span class="k">return</span> <span class="p">(</span><span class="kt">object</span><span class="p">)</span><span class="n">temp</span><span class="p">;</span> </span><span id="L-17"><a name="L-17"></a> <span class="p">}</span> </span><span id="L-18"><a name="L-18"></a> <span class="kt">object</span> <span class="n">panel</span> <span class="p">=</span> <span class="n">FindItemsPanel</span><span class="p">(</span><span class="n">child</span><span class="p">);</span> </span><span id="L-19"><a name="L-19"></a> <span class="k">if</span> <span class="p">(</span><span class="n">panel</span> <span class="p">!=</span> <span class="k">null</span><span class="p">)</span> </span><span id="L-20"><a name="L-20"></a> <span class="p">{</span> </span><span id="L-21"><a name="L-21"></a> <span class="kt">object</span> <span class="n">temp</span> <span class="p">=</span> <span class="n">panel</span><span class="p">;</span> </span><span id="L-22"><a name="L-22"></a> <span class="k">return</span> <span class="p">(</span><span class="kt">object</span><span class="p">)</span><span class="n">temp</span><span class="p">;</span> <span class="c1">// return the panel up the call stack</span> </span><span id="L-23"><a name="L-23"></a> <span class="p">}</span> </span><span id="L-24"><a name="L-24"></a> <span class="p">}</span> </span><span id="L-25"><a name="L-25"></a> <span class="p">}</span> </span><span id="L-26"><a name="L-26"></a> <span class="k">return</span> <span class="nf">default</span><span class="p">(</span><span class="kt">object</span><span class="p">);</span> </span><span id="L-27"><a name="L-27"></a><span class="p">}</span> </span><span id="L-28"><a name="L-28"></a> </span><span id="L-29"><a name="L-29"></a> </span><span id="L-30"><a name="L-30"></a><span class="p">&lt;</span><span class="n">ItemsControl</span><span class="p">&gt;</span> </span><span id="L-31"><a name="L-31"></a> <span class="p">&lt;</span><span class="n">ItemsControl</span><span class="p">.</span><span class="n">ItemsPanel</span><span class="p">&gt;</span> </span><span id="L-32"><a name="L-32"></a> <span class="p">&lt;</span><span class="n">ItemsPanelTemplate</span><span class="p">&gt;</span> </span><span id="L-33"><a name="L-33"></a> <span class="p">&lt;</span><span class="n">StackPanel</span> <span class="p">/&gt;</span> </span><span id="L-34"><a name="L-34"></a> <span class="p">&lt;/</span><span class="n">ItemsPanelTemplate</span><span class="p">&gt;</span> </span><span id="L-35"><a name="L-35"></a> <span class="p">&lt;/</span><span class="n">ItemsControl</span><span class="p">.</span><span class="n">ItemsPanel</span><span class="p">&gt;</span> </span><span id="L-36"><a name="L-36"></a><span class="p">&lt;/</span><span class="n">ItemsControl</span> </span></pre></div> </td></tr></table>
WPF