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WPF TextBox 验证输入

Posted on 2011-05-13 21:58  linFen  阅读(2972)  评论(0编辑  收藏  举报
//验证输入为数字
02 private void txt_time_KeyDown(object sender, KeyEventArgs e)
03 {
04     if (!((e.Key >= Key.D0 && e.Key <= Key.D9) || (e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9)))
05     {
06         e.Handled = true;
07     }
08 }
09  
10 //屏蔽粘贴非法字符
11 private void txt_time_TextChanged(object sender, TextChangedEventArgs e)
12 {
13     var textBox = sender as TextBox;
14     TextChange[] change = new TextChange[e.Changes.Count];
15     e.Changes.CopyTo(change, 0);
16  
17     int offset = change[0].Offset;
18     if (change[0].AddedLength > 0)
19     {
20         double num = 0;
21         if (!Double.TryParse(textBox.Text, out num))
22         {
23             textBox.Text = textBox.Text.Remove(offset, change[0].AddedLength);
24             textBox.Select(offset, 0);
25         }
26     }
27 }

 

 

01 //屏蔽非法按键
02 private void txtAge_KeyDown(object sender, KeyEventArgs e)
03 {
04     TextBox txt = sender as TextBox;
05  
06     if ((e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9) || e.Key == Key.Decimal)
07     {
08         if (txt.Text.Contains(".") && e.Key == Key.Decimal)
09         {
10             e.Handled = true;
11             return;
12         }
13         e.Handled = false;
14     }
15     else if (((e.Key >= Key.D0 && e.Key <= Key.D9) || e.Key == Key.OemPeriod) && e.KeyboardDevice.Modifiers != ModifierKeys.Shift)
16     {
17         if (txt.Text.Contains(".") && e.Key == Key.OemPeriod)
18         {
19             e.Handled = true;
20             return;
21         }
22         e.Handled = false;
23     }
24     else
25     {
26         e.Handled = true;
27     }
28 }
29  
30 //屏蔽中文输入和非法字符粘贴输入
31 private void txtAge_TextChanged(object sender, TextChangedEventArgs e)
32 {
33     TextBox textBox = sender as TextBox;
34     TextChange[] change = new TextChange[e.Changes.Count];
35     e.Changes.CopyTo(change, 0);
36  
37     int offset = change[0].Offset;
38     if (change[0].AddedLength > 0)
39     {
40         double num = 0;
41         if (!Double.TryParse(textBox.Text, out num))
42         {
43             textBox.Text = textBox.Text.Remove(offset, change[0].AddedLength);
44             textBox.Select(offset, 0);
45         }
46     }
47 }