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<div class="section" id="appendix-b">
<h1><span class="section-number">6. </span><strong>Appendix B</strong><a class="headerlink" href="#appendix-b" title="Permalink to this headline">¶</a></h1>
<p>This appendix deals with technical subjects regarding the OON stack.</p>
<div class="section" id="openrpa">
<h2><span class="section-number">6.1. </span><strong>OpenRPA</strong><a class="headerlink" href="#openrpa" title="Permalink to this headline">¶</a></h2>
<div class="section" id="activities">
<h3><span class="section-number">6.1.1. </span>Activities<a class="headerlink" href="#activities" title="Permalink to this headline">¶</a></h3>
<div class="section" id="click-element">
<h4><span class="section-number">6.1.1.1. </span>Click Element<a class="headerlink" href="#click-element" title="Permalink to this headline">¶</a></h4>
<div class="section" id="virtual-click">
<h5><span class="section-number">6.1.1.1.1. </span>Virtual Click<a class="headerlink" href="#virtual-click" title="Permalink to this headline">¶</a></h5>
<p>A virtual click is different from a physical click in that it simulates a mouse event by using <code class="docutils literal notranslate"><span class="pre">User32.dll</span></code>. There are several reasons to do this but the main ones are: it consumes less resources and provides a faster way of clicking an element. For more on the <code class="docutils literal notranslate"><span class="pre">mouse_event</span></code> function, please refer to <a class="reference external" href="https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-mouse_event">this link</a> (<code class="docutils literal notranslate"><span class="pre">https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-mouse_event</span></code>).</p>
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<div class="section" id="data-types">
<h3><span class="section-number">6.1.2. </span>Data Types<a class="headerlink" href="#data-types" title="Permalink to this headline">¶</a></h3>
<div class="section" id="dataview">
<h4><span class="section-number">6.1.2.1. </span>DataView<a class="headerlink" href="#dataview" title="Permalink to this headline">¶</a></h4>
<p>As per the <a class="reference external" href="https://docs.microsoft.com/en-us/dotnet/api/system.data.dataview?view=netcore-3.1">DataView Class page</a> (<code class="docutils literal notranslate"><span class="pre">https://docs.microsoft.com/en-us/dotnet/api/system.data.dataview?view=netcore-3.1</span></code>), a <code class="docutils literal notranslate"><span class="pre">DataView</span></code> represents a databindable, customized view of a <code class="docutils literal notranslate"><span class="pre">DataTable</span></code> for sorting, filtering, searching, editing and navigation. It also does not store data, but instead represents a connected view of its corresponding <code class="docutils literal notranslate"><span class="pre">DataTable</span></code>. Changes made to the <code class="docutils literal notranslate"><span class="pre">DataView</span></code>’s data will affect the <code class="docutils literal notranslate"><span class="pre">DataTAble</span></code>. Changes to the <code class="docutils literal notranslate"><span class="pre">DataTable</span></code>’s data will affect all <code class="docutils literal notranslate"><span class="pre">DataViews</span></code> associated with it.</p>
<div class="section" id="filtering-through-a-datatable-using-dataview">
<h5><span class="section-number">6.1.2.1.1. </span>Filtering through a DataTable using DataView<a class="headerlink" href="#filtering-through-a-datatable-using-dataview" title="Permalink to this headline">¶</a></h5>
<p>To filter through data inside a <code class="docutils literal notranslate"><span class="pre">DataTable</span></code> using a <code class="docutils literal notranslate"><span class="pre">DataView</span></code>, first assign a variable of type <code class="docutils literal notranslate"><span class="pre">System.Data.DataView</span></code> to the <code class="docutils literal notranslate"><span class="pre">DefaultView</span></code> attribute of the <code class="docutils literal notranslate"><span class="pre">DataTable</span></code> you want to filter through.</p>
<p>After that, assign to the <code class="docutils literal notranslate"><span class="pre">RowFilter</span></code> attribute of the <code class="docutils literal notranslate"><span class="pre">DataView</span></code> variable the filter you want to apply. In our case, we’re using the <code class="docutils literal notranslate"><span class="pre">"ID</span> <span class="pre">></span> <span class="pre">2</span></code>” to filter through all <code class="docutils literal notranslate"><span class="pre">Int32</span></code> values larger than 2 inside our <code class="docutils literal notranslate"><span class="pre">DataTable</span></code>.</p>
<p>Then, just to make sure the <code class="docutils literal notranslate"><span class="pre">DataView</span></code> has actually filtered, we use a <code class="docutils literal notranslate"><span class="pre">Foreach</span> <span class="pre">DataRow</span></code> activity to output every row inside the <code class="docutils literal notranslate"><span class="pre">DataView</span></code>. An example is shown below, with <code class="docutils literal notranslate"><span class="pre">view</span></code> as the <code class="docutils literal notranslate"><span class="pre">DataView</span></code> variable and <code class="docutils literal notranslate"><span class="pre">dt</span></code> as the <code class="docutils literal notranslate"><span class="pre">DataTable</span></code> variable.</p>
<div class="figure align-center">
<a class="reference internal image-reference" href="images/appendix_b_dataview_snippet.png"><img alt="images/appendix_b_dataview_snippet.png" src="images/appendix_b_dataview_snippet.png" style="width: 528.5px; height: 265.5px;" /></a>
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<div class="section" id="nested-getelements">
<h3><span class="section-number">6.1.3. </span>Nested GetElements<a class="headerlink" href="#nested-getelements" title="Permalink to this headline">¶</a></h3>
</div>
<div class="section" id="image-handling">
<h3><span class="section-number">6.1.4. </span>Image Handling<a class="headerlink" href="#image-handling" title="Permalink to this headline">¶</a></h3>
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