有讀者來信問到Silverlight 2.0 中,能否TextBox無法輸入中文,
就目前的狀況看來,只能由KeyDown事件處理,如下所示:
有讀者來信問到Silverlight 2.0 中,能否TextBox無法輸入中文,
就目前的狀況看來,只能由KeyDown事件處理,如下所示:
1 <UserControl x:Class="SLGridDemo.DemoTextBox"
2 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
4 Width="400" Height="300">
5 <Canvas x:Name="LayoutRoot" Background="White">
6 <TextBox x:Name="txt1" Canvas.Top="50" Canvas.Left="50" Width="100" Text="" TextChanged="txt1_TextChanged" KeyDown="txt1_KeyDown"/>
7 </Canvas>
8 </UserControl>
2 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
3 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
4 Width="400" Height="300">
5 <Canvas x:Name="LayoutRoot" Background="White">
6 <TextBox x:Name="txt1" Canvas.Top="50" Canvas.Left="50" Width="100" Text="" TextChanged="txt1_TextChanged" KeyDown="txt1_KeyDown"/>
7 </Canvas>
8 </UserControl>
.cs
01 
using System;
02
using System.Collections.Generic;
03using System.Linq;
04using System.Net;
05using System.Windows;
06using System.Windows.Controls;
07using System.Windows.Documents;
08using System.Windows.Input;
09using System.Windows.Media;
10using System.Windows.Media.Animation;
11
using System.Windows.Shapes;
12
13namespace SLGridDemo
14{
15
public partial class DemoTextBox : UserControl
16
{
17 private string _baseText;
18 private int _selectStart;
19 private bool _deleteChanged = false;
20
21 public DemoTextBox()
22 {
23 InitializeComponent();
24
}
25
26 private void txt1_TextChanged(object sender, TextChangedEventArgs e)
27 {
28 if (_deleteChanged)
29 {
30 txt1.Text = _baseText;
31 txt1.SelectionStart = _selectStart;
32 _deleteChanged = false;
33 }
34 }
35
36 private void txt1_KeyDown(object sender, KeyEventArgs e)
37 {
38 _baseText = txt1.Text;
39 _selectStart = txt1.SelectionStart;
40 if (e.Key == Key.Unknown)
41 _deleteChanged = true;
42 }
43 }
44}
using System; 
using 02
using System.Collections.Generic; 03
using System.Linq; 04
using System.Net; 05
using System.Windows; 06
using System.Windows.Controls; 07
using System.Windows.Documents; 08
using System.Windows.Input; 09
using System.Windows.Media; 10
using System.Windows.Media.Animation; 11
using System.Windows.Shapes; 12
13
namespace SLGridDemo 14
{ 15
public partial class DemoTextBox : UserControl 16
{ 
17
private string _baseText; 18
private int _selectStart; 19
private bool _deleteChanged = false; 20
21
public DemoTextBox() 22
{ 23
InitializeComponent(); 24
} 25
26
private void txt1_TextChanged(object sender, TextChangedEventArgs e) 27
{ 28
if (_deleteChanged) 29
{ 30
txt1.Text = _baseText; 31
txt1.SelectionStart = _selectStart; 32
_deleteChanged = false; 33
} 34
} 35
36
private void txt1_KeyDown(object sender, KeyEventArgs e) 37
{ 38
_baseText = txt1.Text; 39
_selectStart = txt1.SelectionStart; 40
if (e.Key == Key.Unknown) 41
_deleteChanged = true; 42
} 43
} 44
}
相反的,只能輸入中文的話,就得處理KeyDown事件及於TextChanged事件中偵測中文.
