WPF 得一些问题汇总

1.CallMethodAction

<TextBox Height="30" Name="txtUserName" Width="160" FontSize="20" VerticalContentAlignment="Center" Text="{Binding UserNme}">

        <i:Interaction.Triggers>

            <i:EventTrigger EventName="KeyDown">

                <ei:CallMethodAction TargetObject="{Binding}" MethodName="UserNameKeyDown" />

            </i:EventTrigger>

        </i:Interaction.Triggers>

    </TextBox>

public void UserNameKeyDown(object sender, KeyEventArgs e)

{

    if (e.Key == Key.Enter)

    {

        Login(null);

    }

}

2.TabControl

　　

<Window x:Class="wpfApplication" ...
   Title="Window1" Height="100" Width="200">

<ScrollViewer>
    <TabControl Height="500" Margin="20" SelectionChanged="TabControlSelectionChanged">
         <TabItem Header="tabItem1">
            <Grid>
               <TextBox />
            <Grid>
         </TabItem>
         <TabItem Header="tabItem2">
            <Grid>
               <TextBox />
            <Grid>
         </TabItem>
         <TabItem Header="tabItem3">
            <Grid>
               <TextBox />
            <Grid>
         </TabItem>
    </TabControl>
</ScrollViewer>

</Window>

C#代码:

private void TabControlSelectionChanged(object sender, SelectionChangedEventArgs e){
   var item = tabControl1.SelectedItem as TabItem;
   if (e.Source is TabControl){
      item.Focus();
   }
}