您可以尝试使用当前属性并使用Loaded事件来运行您当前在构造函数中运行的代码。这是一个小例子:
主窗口.xaml
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525" xmlns:my="clr-namespace:WpfApplication1">
<Grid>
<my:UserControl1 FileExtensionFilter="RTF" HorizontalAlignment="Left" Margin="10,10,0,0" x:Name="userControl1" VerticalAlignment="Top" />
<my:UserControl1 FileExtensionFilter="XML" HorizontalAlignment="Left" Margin="10,10,0,0" x:Name="userControl2" VerticalAlignment="Top" />
<my:UserControl1 FileExtensionFilter="PDF" HorizontalAlignment="Left" Margin="10,10,0,0" x:Name="userControl3" VerticalAlignment="Top" />
</Grid>
</Window>
用户控制
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for UserControl1.xaml
/// </summary>
public partial class UserControl1 : UserControl
{
string filter = "NULL";
public UserControl1()
{
InitializeComponent();
System.Diagnostics.Debug.WriteLine("Property" + filter + "Set during Constructor");
}
public string FileExtensionFilter
{
get { return filter; }
set { filter = value; }
}
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
System.Diagnostics.Debug.WriteLine("Property" + filter + "Set during Loaded");
}
private void UserControl_Initialized(object sender, EventArgs e)
{
System.Diagnostics.Debug.WriteLine("Property" + filter + "Set during Initialized");
}
}
}
输出
PropertyNULLSet during Initialized
PropertyNULLSet during Initialized PropertyNULLSet during Initialized PropertyNULLSet
during Initialized PropertyNULLSet
during Initialized
PropertyNULLSet
during Constructor
PropertyRTFSet during Loaded
PropertyXMLSet during Loaded
PropertyPDFSet during Loaded