blocks|key|968391|text|在这种情况下，您应该能够简单地使用.Text()来设置它：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|968392|cmbBudgetYear.Text+=+"2010";|code-block|syntax|javascript|968393|但是，为了在更改后获得值，可能是因为我没有在所有地方设置SelectedValuePath="Content"，或者可能是因为我没有使用SelectedValue来设置它(以及为什么我要提到它)，确定实际值变得稍微复杂一些，因为您必须在XAML中添加SelectionChanged的事件处理程序之后执行此操作：|968394|private+void+cmbBudgetYear_SelectionChanged(object+sender,+EventArgs+e)
{
++++ComboBox+cbx+=+(ComboBox)sender;
++++string+yourValue+=+String.Empty;
++++if+(cbx.SelectedValue+==+null)
++++++++yourValue+=+cbx.SelectionBoxItem.ToString();
++++else
+++++++yourValue+=+cboParser(cbx.SelectedValue.ToString());
}|968395|需要解析器的地方是因为.SelectedValue.ToString()会给出类似System.Windows.Controls.Control:+2010的东西，所以你必须把它解析出来才能得到值：|968396|private+static+string+cboParser(string+controlString)
{
+++if+(controlString.Contains(':'))
+++{
+++++++controlString+=+controlString.Split(':')[1].TrimStart('+');
+++}
+++return+controlString;
}|968397|至少，这是我遇到的.我知道这个问题是关于设置框的，但是以后也不能只解决设置而不讨论如何获取它，因为如果它改变了，你如何设置它将决定如何获取它。|968398|entityMap^0|H|7|0|0|S|R|1W|D|3H|G|0|0|B|P|15|11|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|18|8|@$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1D|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|1E|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]]|V|$]]

In this case, you should be able to simply use <code>.Text()</code> to set it:

<pre><code>cmbBudgetYear.Text = "2010";
</code></pre>

For getting the value after a change, though, and maybe it's because I didn't set <code>SelectedValuePath="Content"</code> everywhere, or maybe because I didn't use <code>SelectedValue</code> to set it (and why I'm mentioning it), it becomes slightly more complicated to determine the actual value, as you have to do this after adding the event handler for <code>SelectionChanged</code> in the XAML:

<pre><code>private void cmbBudgetYear_SelectionChanged(object sender, EventArgs e)
{
 ComboBox cbx = (ComboBox)sender;
 string yourValue = String.Empty;
 if (cbx.SelectedValue == null)
 yourValue = cbx.SelectionBoxItem.ToString();
 else
 yourValue = cboParser(cbx.SelectedValue.ToString());
}
</code></pre>

Where a parser is needed because <code>.SelectedValue.ToString()</code> will give you something like <code>System.Windows.Controls.Control: 2010</code>, so you have to parse it out to get the value:

<pre><code>private static string cboParser(string controlString)
{
 if (controlString.Contains(':'))
 {
 controlString = controlString.Split(':')[1].TrimStart(' ');
 }
 return controlString;
}
</code></pre>

At least, this is what I ran into.... I know this question was about setting the box, but can't address only setting without talking about how to get it, later, too, as how you set it will determine how you get it if it is changed.

blocks|key|1182679|text|它对我来说很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1182680|ObservableCollection<OrganizationView>+Organizations+{+get;+set;+}

Organizations+=+GetOrganizations();

await+Dispatcher.BeginInvoke((Action)(()+=>
++++{
++++var+allOrganizationItem+=+new+OrganizationView()+{+ID+=+0,+IsEnabled+=+true,+Name+=+"(All)"+};+//+It+is+a+class
++++Organizations.Add(allOrganizationItem);
++++cbOrganizations.DisplayMemberPath+=+"Name";
++++cbOrganizations.SelectedValuePath+=+"ID";
++++cbOrganizations.ItemsSource+=+null;
++++cbOrganizations.ItemsSource+=+Organizations;+//+Set+data+source+which+has+all+items
++++cbOrganizations.SelectedItem+=+allOrganizationItem;+//+It+will+make+it+as+a+selected+item
++++}));+++|code-block|syntax|javascript|1182681|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

It works fine for me.

<pre><code>ObservableCollection&lt;OrganizationView&gt; Organizations { get; set; }

Organizations = GetOrganizations();

await Dispatcher.BeginInvoke((Action)(() =&gt;
 {
 var allOrganizationItem = new OrganizationView() { ID = 0, IsEnabled = true, Name = "(All)" }; // It is a class
 Organizations.Add(allOrganizationItem);
 cbOrganizations.DisplayMemberPath = "Name";
 cbOrganizations.SelectedValuePath = "ID";
 cbOrganizations.ItemsSource = null;
 cbOrganizations.ItemsSource = Organizations; // Set data source which has all items
 cbOrganizations.SelectedItem = allOrganizationItem; // It will make it as a selected item
 })); 
</code></pre>

blocks|key|1182700|text|在我的示例中，我使用以下命令手动添加值：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1182701|myComboBox.Items.Add("MyItem");|code-block|syntax|javascript|1182702|然后我用以下命令选择想要的那个：|1182703|myComboBox.SelectedItem+=+"WantedItem";|1182704|而不是：|1182705|myComboBox.SelectedValue+=+"WantedItem";|1182706|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

In my case I added the values manually with:

<pre><code>myComboBox.Items.Add("MyItem");
</code></pre>

and then I select the wanted one with:

<pre><code>myComboBox.SelectedItem = "WantedItem";
</code></pre>

instead of: 

<pre><code>myComboBox.SelectedValue = "WantedItem";
</code></pre>

<pre><code>&lt;ComboBox Grid.Row="1" Grid.Column="0" Width="Auto" Name="cmbBudgetYear"&gt;
 &lt;ComboBoxItem Content="2009" /&gt;
 &lt;ComboBoxItem Content="2010" /&gt;
 &lt;ComboBoxItem Content="2011" /&gt;
 &lt;ComboBoxItem Content="2012" /&gt;
&lt;/ComboBox&gt;
</code></pre>

How do I set the selected item to the current year in the code behind?

Something like...

<pre><code>cmbBudgetYear.SelectedItem = cmbBudgetYear.Items(
 get the item with the Now.Year.ToString)
</code></pre>

Set SelectedItem of WPF ComboBox

Windows

<ComboBox Grid.Row="1" Grid.Column="0" Width="Auto" Name="cmbBudgetYear"> <ComboBoxItem Content="2009" /> <ComboBoxItem Content="2010" /> <ComboBoxItem Co...

问设置WPF ComboBox的SelectedItem
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