WPF XAML的textbox与C#的代码绑定显示不了

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:vm="clr-namespace:WpfApplication1"
    Title="Hello" Height="300" Width="300">
    <Window.DataContext>
        <vm:text2/>
    </Window.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition />
            <RowDefinition />
        </Grid.RowDefinitions>
        <TextBox Grid.Row="0" Background="GreenYellow" Name="txt1" Text="{Binding Txt ,Mode=OneWay}" MinHeight="20" MaxHeight="20" MaxWidth="100"></TextBox>
        <TextBox Grid.Row="2" Background="GreenYellow" Name="txt2" Text="{Binding Txt}" MinHeight="20" MaxHeight="20" MaxWidth="100"></TextBox>
        <Button Grid.Row="1" Name="btnTest" Command="{Binding Path=BtnClick}" MaxHeight="20" MaxWidth="100"></Button>
    </Grid>
</Window>



private void Btn_Click(object param)
        {

            Window1 text = new Window1();
            List<Detail> list = new List<Detail>();
            Detail text111 = new Detail();
            text111.Txt = "111";
            list.Add(text111);
            text.txt1.DataContext = list;
        } --------------------编程问答-------------------- 哎，没人回答啊 --------------------编程问答-------------------- BtnClick Btn_Click --------------------编程问答-------------------- <TextBox Grid.Row="0" Grid.Column="1"
    Text="{Binding Path=StudentID}" />
--------------------编程问答-------------------- WPF数据绑定  --------------------编程问答-------------------- 没有人了解么？在线等待中

补充：.NET技术 ,  C#