C# 如何在WPF中正确使用UserControl?
我创建了这个用户控件C# 如何在WPF中正确使用UserControl?,c#,wpf,xaml,visual-studio-2013,C#,Wpf,Xaml,Visual Studio 2013,我创建了这个用户控件 <UserControl x:Class="POS1.Windows.Controles.txttransparente" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http
<UserControl x:Class="POS1.Windows.Controles.txttransparente"
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"
Height="auto" Width=" auto"
>
<Border BorderBrush="Yellow" Background="Transparent" CornerRadius="10,10,10,10" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2">
<TextBox Name="txt1" Background="Transparent" BorderBrush="Black" BorderThickness="3" Text="Usuario" FontSize="20" FontWeight="ExtraBold" ></TextBox>
</Border>
</UserControl>
当我将其添加到窗口时
<Controls:MetroWindow
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:Custom="http://modernwpf" xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
x:Class="POS1.MainWindow"
xmlns:txt="clr-namespace:POS1.Windows.Controles"
Title="MainWindow" Height="292" Width="535" AllowsTransparency="True" WindowStyle="None"
>
<Grid>
<Grid.RowDefinitions >
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions >
<ColumnDefinition Width="133*"/>
<ColumnDefinition Width="134*"/>
<ColumnDefinition Width="135*"/>
<ColumnDefinition Width="133*"/>
</Grid.ColumnDefinitions>
<Border Grid.ColumnSpan="4" Grid.RowSpan="7" CornerRadius="40,50,60,70">
<Border.Background>
<ImageBrush ImageSource="pack://siteoforigin:,,,/Resources/b.jpg"/>
</Border.Background>
</Border>
<Border BorderBrush="Yellow" Background="Transparent" CornerRadius="10,10,10,10" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2">
<TextBox Background="Transparent" BorderBrush="Black" BorderThickness="3" Text="Usuario" FontSize="20" FontWeight="ExtraBold" ></TextBox>
</Border>
<TextBox Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="2" Text="Contraseña" FontSize="20" FontWeight="ExtraBold" ></TextBox>
<Button Grid.Row="5" Grid.Column="1" Content="Aceptar" FontSize="12" FontWeight="ExtraBold" ></Button>
<Button Grid.Row="5" Grid.Column="2" Content="Olvidé contraseña" FontSize="12" FontWeight="ExtraBold" ></Button>
<txt:txttransparente Content=" Hola Mundo" Grid.Row="6" Grid.Column="1" Grid.ColumnSpan="2" ></txt:txttransparente>
</Grid>
</Controls:MetroWindow>
如您所见,我无法修改txt1.Text
,因此我使用了Content=“hola mundo”
但是,它如上所述,但与按钮usuario不同,如果不显式导航控件的可视树,
UserControl
中的元素需要实现一种机制,将使用控件的客户端代码中的数据传递到其中包含的元素。执行此操作的常见策略是,只需在UserControl
类型本身上声明一个属性,然后将控件树中的相应成员绑定到该属性
例如:
class txttransparente : UserControl
{
public static readonly DependencyProperty TextProperty = DependencyProperty.Register(
"Text", typeof(string), typeof(txttransparente));
public string Text
{
get { return (string)GetValue(TextProperty); }
set { SetValue(TextProperty, value); }
}
}
然后在用户控件的XAML中:
<UserControl x:Class="POS1.Windows.Controles.txttransparente"
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"
xmlns:local="clr-namespace:POS1.Windows.Controles"
mc:Ignorable="d"
Height="auto" Width=" auto">
<Border BorderBrush="Yellow" Background="Transparent" CornerRadius="10,10,10,10"
Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2">
<TextBox Name="txt1" Background="Transparent" BorderBrush="Black"
BorderThickness="3"
Text="{Binding Text,
RelativeSource={RelativeSource AncestorType={x:Type local:
txttransparente}}}"
FontSize="20"
FontWeight="ExtraBold"/>
</Border>
</UserControl>
您想做什么?您想更改txt1中显示的文本吗?如果是这样,就使用用户控件上的属性来获取/设置它的内容?
<txt:txttransparente Text="Hola Mundo" Grid.Row="6" Grid.Column="1" Grid.ColumnSpan="2"/>