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();
   }
}