WPF绑定各种数据源之xml数据源-白红宇

WPF绑定各种数据源之xml数据源

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发布时间：2019-06-21

本文共 2832 字，大约阅读时间需要 9 分钟。

一、WPF绑定各种数据源索引

Binding的基础可参考

二、WPF绑定各种数据源之xml数据源，此时的XML源写在界面了，当然也可以独立成文件。

                  
<Window.Resources>
       
<Con:BackgroundConverter x:Key=
"BackgroundConverter"
/>
       
<XmlDataProvider x:Key=
"myPerson3"
>
           
<x:XData>
               
<PersonF xmlns=
""
>
                   
<person Name=
"Person1"
>
                       
<ID>1</ID>
                       
<Name>XiaoA</Name>
                       
<Age>49</Age>
                   
</person>
                   
<person Name=
"Person2"
>
                       
<ID>2</ID>
                       
<Name>XiaoB</Name>
                       
<Age>29</Age>
                   
</person>
                   
<person Name=
"Person3"
>
                       
<ID>3</ID>
                       
<Name>XiaoC</Name>
                       
<Age>103</Age>
                   
</person>
                   
<person Name=
"Person4"
>
                       
<ID>4</ID>
                       
<Name>XiaoD</Name>
                       
<Age>59</Age>
                   
</person>
               
</PersonF>
           
</x:XData>
       
</XmlDataProvider>
   
</Window.Resources>

　　下面是绑定的代码。此时需要注意，原来用Path改成了XPath，因为这是XML源，并且ItemsSource 改成 ItemsSource="{Binding Source={StaticResource myPerson3},XPath=/PersonF/person}"

                  
<ListView Height=
"262"
Margin=
"0,32,56,0"
ItemsSource=
"{Binding Source={StaticResource myPerson3},XPath=/PersonF/person}"
VerticalAlignment=
"Top"
Name=
"listView3"
HorizontalAlignment=
"Right"
Width=
"310"
>
      
<ListView.View>
          
<GridView>
              
<GridViewColumn Header=
"编号"
DisplayMemberBinding=
"{Binding XPath=ID}"
Width=
"100"
/>
              
<GridViewColumn Header=
"姓名"
DisplayMemberBinding=
"{Binding XPath=Name}"
Width=
"100"
/>
              
<GridViewColumn Header=
"年龄"
Width=
"100"
>
                  
<GridViewColumn.CellTemplate>
                      
<DataTemplate>
                          
<TextBlock Grid.Column=
"1"
Text=
"{Binding XPath=Age}"
Foreground=
"{Binding XPath=Age, Converter={StaticResource BackgroundConverter}}"
/>
                      
</DataTemplate>
                  
</GridViewColumn.CellTemplate>
              
</GridViewColumn>
          
</GridView>
      
</ListView.View>
  
</ListView>
         
       

　　下面是值转换

                  
public
class
BackgroundConverter : IValueConverter
   
{ 
       
#region IValueConverter Members
       
public
object
Convert(
object
value, Type targetType, 
object
parameter, System.Globalization.CultureInfo culture)
       
{ 
           
Color color = 
new
Color();
           
int
num = 
int
.Parse(value.ToString());
           
if
(num > 100)
               
color = Colors.Yellow;
           
else
if
(num < 50)
               
color = Colors.LightGreen;
           
else
               
color = Colors.LightPink;
           
return
new
SolidColorBrush(color);
       
}
       
public
object
ConvertBack(
object
value, Type targetType, 
object
parameter, System.Globalization.CultureInfo culture)
       
{ 
           
throw
new
NotImplementedException();
       
}
       
#endregion
   
}
         
       

　　效果图：

2.使用外部XML数据源，只需做如下修改

                  
<Window.Resources>
       
<XmlDataProvider x:Key=
"myPerson3"
Source=
"/Person.xml"
/>
  
</Window.Resources>

3.如果使用外部XML数据源，并且采用C#代码的形式，则如下：

                  
XmlDocument doc = 
new
XmlDocument();
 
doc.Load(
@"http://www.cnblogs.com/XMLFile1.xml"
);
 
XmlDataProvider provider = 
new
XmlDataProvider();
 
provider.Document = doc;
 
provider.XPath = 
@"/PersonF/person"
;
 
listView3.DataContext = provider;
 
listView3.SetBinding(ListView.ItemsSourceProperty, 
new
Binding());
         
       

当然也可以使用XMLDataProvider的Source属性，此时只需做如下修改：

                  
XmlDataProvider provider = 
new
XmlDataProvider();
provider.Source = 
new
Uri(
@"F:\\XMLFile1.xml"
);
provider.XPath = 
@"/PersonF/person"
;
         
       