WPF实现WrapPanel动态添加或删除项

   最近在做一个项目的时候，有一个需求就是，通过RadioButton来控制一行内容的显示与不显示，当不显示的时候，下面的项能够占住相应的位置，当增加的时候，又会在原来的位置重新显示，如果使用一般的Grid或者其它的布局的时候，位置就确定下来了，但是使用WrapPanel或者StackPanel这类的控件的时候，能够在增加或者删除项的时候实现重新布局，这在实际使用的时候是非常有用的，现总结如下：

 1 <WrapPanel Grid.Column="1" Grid.Row= "1" Orientation= "Vertical" HorizontalAlignment= "Center" >
 2      <StackPanel Orientation= "Horizontal" Visibility= "{Binding Path=JDBHIsVisibility, Mode=TwoWay,Converter={StaticResource BoolToVisibility    Converter}}">
 3              <Border BorderBrush= "Transparent" BorderThickness= "2" Height= "70" >
 4                      <Label Name= "lbl00" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Center" VerticalAlignment= "Center" Height= "66" Width= "300"> 警单编号：</Label>
 5                </Border>
 6             <Border BorderBrush = "Transparent" BorderThickness= "2" Height= "70" >
 7              <Label Name= "lb_id" Content= "{Binding Path=JDBH,Mode=TwoWay}" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Left" Height= "66" Width= "715">
 8              </Label>
 9             </Border>
10      </StackPanel>
11      <StackPanel Orientation= "Horizontal" Visibility= "{Binding Path=BJSJIsVisibility, Mode=TwoWay,Converter={StaticResource  BoolToVisibilityConverter}}">
12          <Border BorderBrush= "Transparent" BorderThickness= "2" Height= "70" >
13              <Label Name= "lbl10" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Center" VerticalAlignment= "Center" Height= "66" Width= "300"> 报警时间：</Label>
14           </Border>
15          <Border BorderBrush = "Transparent" BorderThickness= "2" Height= "70" >
16              <Label Name= "lb_time" Content= "{Binding Path=BJSJ,Mode=TwoWay}" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Left" VerticalAlignment= "Center" Height= "66" Width= "715" ></Label>
17          </Border>
18      </StackPanel>
19      <StackPanel Orientation= "Horizontal" Visibility= "{Binding Path=BJDZIsVisibility, Mode=TwoWay,Converter={StaticResource  BoolToVisibilityConverter}}">
20          <Border BorderBrush= "Transparent" BorderThickness= "2" Height= "70" >
21               <Label x:Name= "lbl20" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Center" VerticalAlignment= "Center" Height= "66" Margin= "0,8" Width= "300" Content= "报警地址："/>
22          </Border>
23          <Border BorderBrush= "Transparent" BorderThickness= "2" Height= "70" Width= "716" >
24              <Label x:Name= "lb_addr" Content= "{Binding Path=BJDZ,Mode=TwoWay}" Style= "{StaticResource StyleLabel}"   HorizontalAlignment= "Left"  Height= "66" Width= "715" Margin= "0,-2,-2,-2"/>
25          </Border>
26      </StackPanel>
27      <StackPanel Orientation= "Horizontal" Visibility= "{Binding Path=BJXQIsVisibility, Mode=TwoWay,Converter={StaticResource  BoolToVisibilityConverter}}" >
28          <Border BorderBrush= "Transparent" BorderThickness= "2" Height= "70" >
29              <Label Name= "lbl30" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Center" VerticalAlignment= "Center" Height= "66" Margin= "0,8" Width= "300" > 报警详情：</Label>
30         </Border>
31        <Border BorderBrush = "Transparent" BorderThickness= "2" Height= "70" Width= "716" >
32              <Label x:Name= "lb_detail" Content= "{Binding Path=BJXQ,Mode=TwoWay}" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Left"  Height= "66" Width= "715"/>
33        </Border>
34      </StackPanel>
35      <StackPanel Orientation= "Horizontal" Visibility= "{Binding Path=BJRIsVisibility, Mode=TwoWay,Converter={StaticResource  BoolToVisibilityConverter}}">
36          <Border BorderBrush= "Transparent" BorderThickness= "2" Height= "70" >
37          <Label Name= "lbl40" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Center" VerticalAlignment= "Center" Height= "66"  Width= "300" > 报 警 人：</Label>
38             </Border>
39            <Border BorderBrush = "Transparent" BorderThickness= "2" Height= "70" Margin= "0,0,10,0" >
40                  <Label Name= "lb_person" Content= "{Binding Path=BJR,Mode=TwoWay}" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Left"  Height= "66" Width= "715">41 42  </Label>
43           </Border>
44      </StackPanel>
45      <StackPanel Orientation = "Horizontal" Visibility= "{Binding Path=BJDHIsVisibility, Mode=TwoWay,Converter={StaticResource  BoolToVisibilityConverter}}" >
46           <Border BorderBrush= "Transparent" BorderThickness= "2" Height= "70" >
47              <Label Name= "lbl50" Style= "{StaticResource StyleLabel}" HorizontalAlignment= "Center" VerticalAlignment= "Center" Height= "66"  Width= "300" Margin= "0,-2"> 报警电话：</Label>
48           </Border>
49           <Border BorderBrush = "Transparent" BorderThickness= "2" Height= "70" Width= "719" >
50              <Label Name= "lb_phone" Content= "{Binding Path=BJDH,Mode=TwoWay}" Style= "{StaticResource StyleLabel}"  HorizontalAlignment= "Left"   Height= "66" Width= "719" Margin= "-2,-2,-2,1"/>
51            </Border>
52      </StackPanel>
53 </WrapPanel> 

这里在WrapPanel中嵌套多个StackPanel，注意Visibility="{Binding Path=BJDHIsVisibility, Mode=TwoWay,Converter={StaticResource  BoolToVisibilityConverter}}"> 实现的核心是，这里我们定义了一个依赖项属性BJDHIsVisibility，并且和RadioButton的IsChecked属性绑定到一起，当RadioButton选中的时候，IsChecked属性为True，我们不能直接将两个属性绑定到一起，必须去定义一个转换器，将BOOL类型的值转化为Visibility所支持的形，这里需要注意，当RadioButton的IsChecked属性为False的时候，Visibility的属性为Visibility.Hidden,此时WrapPanel会实现重新排列，这是我们需要注意的地方，以后需要的时候可以参考此值！