WPF绑定错误-白红宇

WPF绑定错误

阅读量：5887 次

发布时间：2019-06-19

本文共 2106 字，大约阅读时间需要 7 分钟。

listbox绑定遇到了奇怪的报错如下：

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=Background; DataItem=null; target element is 'ListBoxItem' (Name=''); target property is 'Background' (type 'Brush')System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=HorizontalContentAlignment; DataItem=null; target element is 'ListBoxItem' (Name=''); target property is 'HorizontalContentAlignment' (type 'HorizontalAlignment')System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=VerticalContentAlignment; DataItem=null; target element is 'ListBoxItem' (Name=''); target property is 'VerticalContentAlignment' (type 'VerticalAlignment')

分析下，我listboxitem根本就没有设置这些啊，经过不断摸索发现，应该是默认的样式，wpf的listboxitem默认样式如下：

Style    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:s="clr-namespace:System;assembly=mscorlib"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    TargetType="{x:Type ListBoxItem}">    
            
          
         
            
                
       
                #00FFFFFF          
              
          
         
            
                
              
          
         
            
                
              
          
         
            
                
       
                2,0,0,0          
              
          
         
            
                
       
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