检查对象列表中的对象类型 [英] Check Object type in List of Objects

问题描述

为WPF表单添加了一个StackPanel，其中包含带有StackPanels的扩展器.

Got a WPF Form with a StackPanel containing Expanders with StackPanels in it.

<Expander Name="eSoftware" Header="5 Software">
    <StackPanel Name="StSoftware" Orientation="Horizontal" HorizontalAlignment="Left"  Margin="0,0,8,0">
        <StackPanel Margin="0,10" Width="29">
            <Image x:Name="img" Height="26" Source="Images/3453120.png" Stretch="Fill" Margin="0,0,0,0"/>
        </StackPanel>
        <StackPanel  Margin="0,10">
            <Label  x:Name="lbl" Content="Label"  Margin="0,0,0,0" />
        </StackPanel>
    </StackPanel>
</Expander>

我在对象列表中阅读了扩展器的内容. 现在，我必须知道列表是否包含stackpanel类型的对象.

I read the Content of the Expander in a list of Objects. Now i must know if the list contains an object of type stackpanel.

List<Object> tmpList = new List<Object>();
tmpList = ReadChild((StackPanel)exp.Content)  //gives out the content of an expander. In the Upper case it is 2 StackPanels

if(tmpList.Contains.typeof(StackPanel)=true) //that's wrong
{
  //search for the Stackpanel with lables in it
}

推荐答案

您可以使用OfType<>过滤列表中的特定类型.我了解您想遍历列表中的所有StackPanel，因此可以执行以下操作:

You can use OfType<> to filter for just a specific type in a list. I understand that you want to loop through all the StackPanels (in the list), so you can do something like this:

foreach(var panel in tmpList.OfType<StackPanel>()){
    //your work here ...
}

如果要检查是否有任何StackPanel，请使用以下方法:

If you want to check if there is any StackPanel, then use this:

if(tmpList.OfType<StackPanel>().Any()){
    //...
}

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