在做一个例子是需要运行起来后焦点默认设置在密码框上，在网上查了资料
自己找到一种方法,此方法在oob模式下管用
public Login()
{
InitializeComponent();txtLoginName.Text = "admin";
// 设置焦点在密码框上
Dispatcher.BeginInvoke(() => { txtLoginPwd.Focus(); });
}
网上找到的另一种方法
1.想在Silverlight首次启动让某个文本框获取焦点，使用Loaded事件中txt.Focus()是不起做用的，要完成这功能只要添加一句代码即可:
private void LayoutRoot_Loaded(object sender, RoutedEventArgs e)
{
HtmlPage.Plugin.Invoke("focus");
txtName.Focus();}
2.在程序中为了方便用户，在一个文本框中按回车后跳到别一个文本框或其它控件，我们可以对原有的TextBox进行扩充，添加一个NextControl的属性用于保存下一个控件的名字,
另外为了方便我加了一个ToNextControl的事件，这样用起来更加方便，代码如下:
namespace HahaMan.SLTools.Controls
{
public class MyTextBox:TextBox
{
//事件
public event EventHandler ToNextControl;private string nextControl="";
//用于保存下一个控件的名字
public string NextControl
{
get { return nextControl; }
set { nextControl = value; }
}protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (e.Key == Key.Enter)//如果是回车
{
if (ToNextControl != null)//如果自己写了事件处理程序
{
ToNextControl(this, e);//调用事件
}
else
{
//如果没有指定事件
if (nextControl != null && nextControl.Length > 0)
{
//查找下一个控件
Control c = (this.Parent as Panel).FindName(nextControl) as Control;
if (c != null)
{
c.Focus();
}
}
}
}
}
}
}
使用方法一:
<my:MyTextBox Height="23" HorizontalAlignment="Left" Margin="786,152,0,0" Name="txtName" <span style="color:#ff0000;">NextControl="txtPwd"</span> VerticalAlignment="Top" Width="120" />
<my:MyTextBox Height="23" HorizontalAlignment="Left" Margin="786,205,0,0" Name="txtPwd" <span style="color:#ff0000;">NextControl="btnLogin"</span> VerticalAlignment="Top" Width="120" />
<Button Content="登录" Height="23" Margin="763,259,0,0" Name="btnLogin" VerticalAlignment="Top" HorizontalAlignment="Left" Width="56" Click="btnLogin_Click" />
使用方法二:
xaml代码:
<my:MyTextBox Height="23" HorizontalAlignment="Left" Margin="786,152,0,0" Name="txtName" VerticalAlignment="Top" Width="120" <span style="color:#ff0000;">ToNextControl="toNextControl"</span> />
<my:MyTextBox Height="23" HorizontalAlignment="Left" Margin="786,205,0,0" Name="txtPwd" VerticalAlignment="Top" Width="120" <span style="color:#ff0000;">ToNextControl="toNextControl"</span> />
<Button Content="登录" Height="23" Margin="763,259,0,0" Name="btnLogin" VerticalAlignment="Top" HorizontalAlignment="Left" Width="56" Click="btnLogin_Click" />
cs代码:
private void toNextControl(object sender, EventArgs e)
{
if (sender == txtName) txtPwd.Focus();
if (sender == txtPwd) btnLogin.Focus();
}
网上找的方法转载至 http://blog.csdn.net/lijun7788/article/details/8087773
Silverlight 密码框 Focus,布布扣,bubuko.com