使用 MVVM 和 WPF 在用户控件内绑定文本块
Binding text blocks inside a user control using MVVM and WPF
我对 MVVM 和 WPF 还是新手
我看过一些例子,但仍然没有找到我问题的确切答案。
我有一个 ListBox
,每个项目都应该使用 ObservableCollection
添加一个新的用户控件。在用户控件中,我有几个文本块,我想将它们的文本绑定到包含数据的相同 ObservableCollection
。
但是我不确定如何将文本块绑定到 ObservableCollection
很乐意提供代码示例。
我还要附上我的代码,这是我的用户控件 XAML:
<UserControl x:Class="ProtocolAnalyzerGui.UserControlls.MenuControlls.UCSingleLine"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="100" d:DesignWidth="300">
<Grid Background="#FF454545">
<Grid.RowDefinitions>
<RowDefinition Height="1*"></RowDefinition>
<RowDefinition Height="1*"></RowDefinition>
</Grid.RowDefinitions>
<TextBlock x:Name="TBHeader" Foreground="White" HorizontalAlignment="Center" VerticalAlignment="Center" ></TextBlock>
<Grid Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="1*"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="1*"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="1*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock x:Name="TBDatanTime" Grid.Column="0" Foreground="White" Text="{Binding DataAndTime }" ></TextBlock>
<TextBlock x:Name="TBComPort" Grid.Column="2" Foreground="White" Text="{Binding ComPort }" ></TextBlock>
<TextBlock x:Name="TBTranslation" Grid.Column="4" Foreground="White" Text="{Binding Translation }" ></TextBlock>
<TextBlock x:Name="TBDataBytesArray" Grid.Column="6" Foreground="White" Text="{Binding Header }" ></TextBlock>
</Grid>
</Grid>
</UserControl>
主要windowXAML:
<ScrollViewer Grid.Row="3" HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto">
<ListBox x:Name="LBListBox">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<myControlls:UCSingleLine x:Name="DataUserContoll"
DataContext="{Binding DataForGui}"></myControlls:UCSingleLine>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</ScrollViewer>
列表框 Itemsource 的绑定在此函数内:
private void MI_SerialPortStart_Click(object sender, RoutedEventArgs e)
{
LBListBox.ItemsSource = DataForGui;
_SerialPortTakeCare.Start();
}
同时附上我的数据代码:
public class Data : INotifyPropertyChanged
{
private string _DataAndTime;
public string DataAndTime
{
get { return _DataAndTime; }
set
{
_DataAndTime = value;
OnPropertyChanged("DataAndTime");
}
}
private string _ComPort;
public string ComPort
{
get { return _ComPort; }
set
{
_ComPort = value;
OnPropertyChanged("ComPort");
}
}
private string _Translation;
public string Translation
{
get { return _Translation; }
set
{
_Translation = value;
OnPropertyChanged("Translation");
}
}
private string _Header;
public string Header
{
get { return _Header; }
set
{
_Header = value;
OnPropertyChanged("Header");
}
}
private string _Data_ARR;
public string Data_ARR
{
get { return _Data_ARR; }
set
{
_Data_ARR = value;
OnPropertyChanged("Data_ARR");
}
}
public Data()
{
_ComPort = "";
_Data_ARR = "";
_DataAndTime = "";
_Header = "";
_Translation = "";
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
您只需设置用户控件的数据上下文,然后添加适当的绑定。
在您的主 window 中,这一行应如下所示:
<local:UserControl1 DataContext="{Binding}" x:Name="DataUserContoll"/>
而在用户控件中,代码应该更像这样:
<TextBlock x:Name="TBDatanTime" Grid.Column="0" Foreground="White" Text="{Binding TextField1}" />
<TextBlock x:Name="TBComPort" Grid.Column="2" Foreground="White" Text="{Binding TextField2}"/>
<TextBlock x:Name="TBTranslation" Grid.Column="4" Foreground="White" Text="{Binding TextField3}"/>
<TextBlock x:Name="TBDataBytesArray" Grid.Column="6" Foreground="White" Text="{Binding TextField4}"/>
... 并且您应该将我输入的占位符字段名称(例如 "TextField1")更改为集合中对象的实际字符串属性 "DataForGui".
我对 MVVM 和 WPF 还是新手 我看过一些例子,但仍然没有找到我问题的确切答案。
我有一个 ListBox
,每个项目都应该使用 ObservableCollection
添加一个新的用户控件。在用户控件中,我有几个文本块,我想将它们的文本绑定到包含数据的相同 ObservableCollection
。
但是我不确定如何将文本块绑定到 ObservableCollection
很乐意提供代码示例。
我还要附上我的代码,这是我的用户控件 XAML:
<UserControl x:Class="ProtocolAnalyzerGui.UserControlls.MenuControlls.UCSingleLine"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="100" d:DesignWidth="300">
<Grid Background="#FF454545">
<Grid.RowDefinitions>
<RowDefinition Height="1*"></RowDefinition>
<RowDefinition Height="1*"></RowDefinition>
</Grid.RowDefinitions>
<TextBlock x:Name="TBHeader" Foreground="White" HorizontalAlignment="Center" VerticalAlignment="Center" ></TextBlock>
<Grid Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="1*"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="1*"></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
<ColumnDefinition Width="1*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock x:Name="TBDatanTime" Grid.Column="0" Foreground="White" Text="{Binding DataAndTime }" ></TextBlock>
<TextBlock x:Name="TBComPort" Grid.Column="2" Foreground="White" Text="{Binding ComPort }" ></TextBlock>
<TextBlock x:Name="TBTranslation" Grid.Column="4" Foreground="White" Text="{Binding Translation }" ></TextBlock>
<TextBlock x:Name="TBDataBytesArray" Grid.Column="6" Foreground="White" Text="{Binding Header }" ></TextBlock>
</Grid>
</Grid>
</UserControl>
主要windowXAML:
<ScrollViewer Grid.Row="3" HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto">
<ListBox x:Name="LBListBox">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<myControlls:UCSingleLine x:Name="DataUserContoll"
DataContext="{Binding DataForGui}"></myControlls:UCSingleLine>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</ScrollViewer>
列表框 Itemsource 的绑定在此函数内:
private void MI_SerialPortStart_Click(object sender, RoutedEventArgs e)
{
LBListBox.ItemsSource = DataForGui;
_SerialPortTakeCare.Start();
}
同时附上我的数据代码:
public class Data : INotifyPropertyChanged
{
private string _DataAndTime;
public string DataAndTime
{
get { return _DataAndTime; }
set
{
_DataAndTime = value;
OnPropertyChanged("DataAndTime");
}
}
private string _ComPort;
public string ComPort
{
get { return _ComPort; }
set
{
_ComPort = value;
OnPropertyChanged("ComPort");
}
}
private string _Translation;
public string Translation
{
get { return _Translation; }
set
{
_Translation = value;
OnPropertyChanged("Translation");
}
}
private string _Header;
public string Header
{
get { return _Header; }
set
{
_Header = value;
OnPropertyChanged("Header");
}
}
private string _Data_ARR;
public string Data_ARR
{
get { return _Data_ARR; }
set
{
_Data_ARR = value;
OnPropertyChanged("Data_ARR");
}
}
public Data()
{
_ComPort = "";
_Data_ARR = "";
_DataAndTime = "";
_Header = "";
_Translation = "";
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
您只需设置用户控件的数据上下文,然后添加适当的绑定。
在您的主 window 中,这一行应如下所示:
<local:UserControl1 DataContext="{Binding}" x:Name="DataUserContoll"/>
而在用户控件中,代码应该更像这样:
<TextBlock x:Name="TBDatanTime" Grid.Column="0" Foreground="White" Text="{Binding TextField1}" />
<TextBlock x:Name="TBComPort" Grid.Column="2" Foreground="White" Text="{Binding TextField2}"/>
<TextBlock x:Name="TBTranslation" Grid.Column="4" Foreground="White" Text="{Binding TextField3}"/>
<TextBlock x:Name="TBDataBytesArray" Grid.Column="6" Foreground="White" Text="{Binding TextField4}"/>
... 并且您应该将我输入的占位符字段名称(例如 "TextField1")更改为集合中对象的实际字符串属性 "DataForGui".