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项目中ItemsControl 自定义了DataTemplate，代码如下：
<ScrollViewer x:Name="PaperScrollCiewer" Margin="1" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Background="#ccc" ScrollChanged="PaperScrollCiewer_ScrollChanged" >
<ItemsControl x:Name="MainItemsControl">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="10"></RowDefinition>
<RowDefinition Height="10*"></RowDefinition>
</Grid.RowDefinitions>
<InkCanvas Grid.Row="1" Background="{Binding ImgPath,Converter={StaticResource BitmapSourceConvert}}" Strokes="{Binding Strokes}" Width="{Binding Width}" Height="{Binding Height}">
<InkCanvas.DefaultDrawingAttributes>
<DrawingAttributes Color="#FFFB1818" FitToCurve="False" Height="3" IgnorePressure="False" IsHighlighter="False" StylusTip="Ellipse" StylusTipTransform="Identity" Width="3"/>
</InkCanvas.DefaultDrawingAttributes>
</InkCanvas>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
其中InkCanvas是用来添加墨迹的，功能就是想实现加载很多个画布，每个画布能单独的绘制墨迹。运行时候发现第一次点击某一个画布，滚动条就自动调整到该item的顶部去了，猜想是触发了SelectedChange事件，默认该item选中时候需要对齐。
解决方法很简单，给ItemsControl设置属性CanContentScroll="True"，完美解决。
修改后代码如下：
<ScrollViewer x:Name="PaperScrollCiewer" Margin="1" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Background="#ccc" ScrollChanged="PaperScrollCiewer_ScrollChanged" CanContentScroll="True">
<ItemsControl x:Name="MainItemsControl">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="10"></RowDefinition>
<RowDefinition Height="10*"></RowDefinition>
</Grid.RowDefinitions>
<InkCanvas Grid.Row="1" Background="{Binding ImgPath,Converter={StaticResource BitmapSourceConvert}}" Strokes="{Binding Strokes}" Width="{Binding Width}" Height="{Binding Height}">
<InkCanvas.DefaultDrawingAttributes>
<DrawingAttributes Color="#FFFB1818" FitToCurve="False" Height="3" IgnorePressure="False" IsHighlighter="False" StylusTip="Ellipse" StylusTipTransform="Identity" Width="3"/>
</InkCanvas.DefaultDrawingAttributes>
</InkCanvas>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
WPF ItemsControl 取消选中item项，滚动条自动跑到该item顶部的问题
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原文地址：http://www.cnblogs.com/tracyjfly/p/5828425.html
