如何动态创建tabControl的Item

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<UserControl xmlns:sdk="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls" x:Class="Silverlight.Common.View.TabControlDemo"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400" xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit">

<Grid x:Name="LayoutRoot" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="70" />
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<StackPanel Grid.Row="1">

<TextBlock Margin="5" x:Name="dataGrid" Text="dataGrid" MouseLeftButtonDown="DataGrid_MouseLeftButtonDown"></TextBlock>
<TextBlock Margin="5" x:Name="treeView" Text="treeView" MouseLeftButtonDown="treeView_MouseLeftButtonDown"></TextBlock>
<TextBlock Margin="5" x:Name="dataForm" Text="dataForm" MouseLeftButtonDown="dataForm_MouseLeftButtonDown"></TextBlock>

</StackPanel>
<sdk:TabControl BorderThickness="5" BorderBrush="Green" MinHeight="500" MinWidth="500" Grid.Column="1" Grid.Row="1" x:Name="tabControl">

</sdk:TabControl>

</Grid>
</UserControl>

2.TabControlDemo .cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Silverlight.Common.View
{
public partial class TabControlDemo : UserControl
{
public TabControlDemo()
{
InitializeComponent();
}

　　//header是tabItem的标题，typeName是所显示界面的全名（命名空间+类名）

private void AddTabItem(string header, string typeName)
{
if (string.IsNullOrEmpty(header) || string.IsNullOrEmpty(typeName))
{
return;
}

　　　　//获取已经显示的TabItem，将TabItem的header作为检索条件

　　 var list = this.tabControl.Items.Where(w => ((TabItem)w).Header.ToString() == header);

　　　　//如果所点击的窗体已打开，那么显示该窗体，这样避免打开多个同一窗体

　　　　if (list.Count() > 0)
{
((TabItem)list.First()).Visibility = Visibility.Visible;

this.tabControl.SelectedItem = list.First();
}
else
{
TabItem tabItem = new TabItem();

tabItem.Header = header;

　　　　　　//用发射实例化窗体类
var tabContent = Activator.CreateInstance(Type.GetType(typeName)) as UserControl;

tabItem.Content = tabContent;

　　　　　　　　//将实例化的tabItem添加到TabControl
this.tabControl.Items.Add(tabItem);
this.tabControl.SelectedItem = tabItem;
}
}

private void DataGrid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{

　　　　//Silverlight.Common.View.DataGridDemo是SilverLight学习笔记七DataGrid控件节中的DataGridDemo(DataGrid控件)
this.AddTabItem("数据", "Silverlight.Common.View.DataGridDemo");
}

private void treeView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{

　　　　//SilverLight学习笔记六TreeView控件中的TreeViewSample（TreeView控件）
this.AddTabItem("树视图", "Silverlight.Common.View.TreeViewSample");
}

private void dataForm_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{

　　　　//SilverLight学习笔记七DataPager,DataForm控件的DataForm（）
this.AddTabItem("数据表单", "Silverlight.Common.View.DataFormDemo");
}
}
}

注：源代码下载：http://files.cnblogs.com/salam/Silverlight.Common.rar