title: How to "Fill" a GridViewColumn with ComboBox (WPF)?
body: <p>I am looking for a way to "completely fill" a <code>GridViewColumn</code> with a combo box. I am able to create a cell template with <code>ComboBox</code> and it is working fine. But the width and height of <code>ComboBox</code> is not aligned with the <code>GridViewColumn</code>. 
  Even if I try to set the same height/width <code>GridViewColumn</code> hides some part of the comboBox.</p>
  
  <p>There must be some setting or style to instruct WPF to fill the <code>ComboBox</code> completely in the available space of <code>GridViewColumn</code></p>
  
  <p>This is my XAML.</p>
  
  <pre><code>&lt;Window x:Class="WPFStarter.ComboInsideListView.ComboBoxInsideListViewUsingObject"
          x:Name="userControl"
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          Title="ComboBoxInsideListViewUsingObject" Height="300" Width="400"&gt;
      &lt;Grid&gt;
          &lt;ListView x:Name="listView" ItemsSource="{Binding ElementName=userControl, 
              Path=DataContext.Items}" SelectedItem="{Binding ElementName=userControl, Path=DataContext.SelectedItem, Mode=TwoWay}"&gt;                   
              &lt;ListView.View&gt;
                  &lt;GridView&gt;
                     &lt;GridViewColumn Header="First Name"  DisplayMemberBinding="{Binding Path=First}"/&gt;
                     &lt;GridViewColumn Header="Gender"&gt;
                          &lt;GridViewColumn.CellTemplate&gt;
                              &lt;DataTemplate&gt;
                                  &lt;ComboBox x:Name="cmb_Gender" Width="75" SelectedValue="{Binding Path=Gender}"                    
                    ItemsSource="{Binding ElementName=userControl, Path=DataContext.Genders}" GotFocus="ComboBox_GotFocus"         /&gt;
                              &lt;/DataTemplate&gt;
                          &lt;/GridViewColumn.CellTemplate&gt;
                      &lt;/GridViewColumn&gt;
                  &lt;/GridView&gt;
  
              &lt;/ListView.View&gt;
  
          &lt;/ListView&gt;
      &lt;/Grid&gt;
  &lt;/Window&gt;
  </code></pre>