VS2003下:
1
Code#region Code
2
//只能输入数字类型
3 private void textBox2_KeyUp(object sender, KeyEventArgs e)
4
{
5 string old &＃61; textBox2.Text.Trim();
6 textBox2.Text &＃61; ToDBC(old);
7
8
}
9 //全角转半角
10 public string ToDBC(string input)
11 {
12 char[] c &＃61; input.ToCharArray();
13 for (int i &＃61; 0; i < c.Length; i&＃43;&＃43;)
14 {
15 if (c[i] &＃61;&＃61; 12288)
16 {
17 c[i] &＃61; (char)32;
18 continue;
19 }
20 if (c[i] > 65280 && c[i] < 65375)
21 c[i] &＃61; (char)(c[i] - 65248);
22 }
23 return new string(c);
24 }
25 //键盘按键事件
26 private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
27 {
28 string old &＃61; textBox2.Text.Trim();
29 if (!char.IsDigit(e.KeyChar))
30 {
31 e.Handled &＃61; true;
32 textBox2.Text &＃61; ToDBC(old);
33 }
34 //&＃39;\b&＃39;是退格键值
35 if (e.KeyChar &＃61;&＃61; &＃39;\b&＃39; || e.KeyChar &＃61;&＃61; &＃39;.&＃39;)
36 {
37 e.Handled &＃61; false;
38 }
39 }
40
#endregion
VS2005下: Code#region Code2
//只能输入数字类型3
private void textBox2_KeyUp(object sender, KeyEventArgs e)4
{5
string old &＃61; textBox2.Text.Trim();6
textBox2.Text &＃61; ToDBC(old);7
8
}9
//全角转半角10
public string ToDBC(string input)11
{12
char[] c &＃61; input.ToCharArray();13
for (int i &＃61; 0; i < c.Length; i&＃43;&＃43;)14
{15
if (c[i] &＃61;&＃61; 12288)16
{17
c[i] &＃61; (char)32;18
continue;19
}20
if (c[i] > 65280 && c[i] < 65375)21
c[i] &＃61; (char)(c[i] - 65248);22
}23
return new string(c);24
}25
//键盘按键事件26
private void textBox2_KeyPress(object sender, KeyPressEventArgs e)27
{28
string old &＃61; textBox2.Text.Trim();29
if (!char.IsDigit(e.KeyChar))30
{31
e.Handled &＃61; true;32
textBox2.Text &＃61; ToDBC(old);33
}34
//&＃39;\b&＃39;是退格键值35
if (e.KeyChar &＃61;&＃61; &＃39;\b&＃39; || e.KeyChar &＃61;&＃61; &＃39;.&＃39;)36
{37
e.Handled &＃61; false;38
}39
}40
#endregion 1Code#region Code
2 //只能输入数字
3 private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
4 {
5
6 if (!char.IsDigit(e.KeyChar))
7 {
8 e.Handled &＃61; true;
9 }
10 //&＃39;\b&＃39;是退格键值
11 if (e.KeyChar &＃61;&＃61; &＃39;\b&＃39;) e.Handled &＃61; false;
12 switch (e.KeyChar)//处理全角字
13 {
14 case &＃39;&＃xff11;&＃39;:
15 {
16 e.KeyChar &＃61; &＃39;1&＃39;;
17 break;
18 }
19 case &＃39;&＃xff12;&＃39;:
20 {
21 e.KeyChar &＃61; &＃39;2&＃39;;
22 break;
23 }
24 case &＃39;&＃xff13;&＃39;:
25 {
26 e.KeyChar &＃61; &＃39;3&＃39;;
27 break;
28 }
29 case &＃39;&＃xff14;&＃39;:
30 {
31 e.KeyChar &＃61; &＃39;4&＃39;;
32 break;
33 }
34 case &＃39;&＃xff15;&＃39;:
35 {
36 e.KeyChar &＃61; &＃39;5&＃39;;
37 break;
38 }
39 case &＃39;&＃xff16;&＃39;:
40 {
41 e.KeyChar &＃61; &＃39;6&＃39;;
42 break;
43 }
44 case &＃39;&＃xff17;&＃39;:
45 {
46 e.KeyChar &＃61; &＃39;7&＃39;;
47 break;
48 }
49 case &＃39;&＃xff18;&＃39;:
50 {
51 e.KeyChar &＃61; &＃39;8&＃39;;
52 break;
53 }
54 case &＃39;&＃xff19;&＃39;:
55 {
56 e.KeyChar &＃61; &＃39;9&＃39;;
57 break;
58 }
59 case &＃39;&＃xff10;&＃39;:
60 {
61 e.KeyChar &＃61; &＃39;0&＃39;;
62 break;
63 }
64 default: break;
65 }
66
67 }
68 #endregion
相对来说,2005下,实现起来更容易一些.Code#region Code2
//只能输入数字3
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)4
{5
6
if (!char.IsDigit(e.KeyChar))7
{8
e.Handled &＃61; true;9
}10
//&＃39;\b&＃39;是退格键值11
if (e.KeyChar &＃61;&＃61; &＃39;\b&＃39;) e.Handled &＃61; false;12
switch (e.KeyChar)//处理全角字13
{14
case &＃39;&＃xff11;&＃39;:15
{16
e.KeyChar &＃61; &＃39;1&＃39;;17
break;18
}19
case &＃39;&＃xff12;&＃39;:20
{21
e.KeyChar &＃61; &＃39;2&＃39;;22
break;23
}24
case &＃39;&＃xff13;&＃39;:25
{26
e.KeyChar &＃61; &＃39;3&＃39;;27
break;28
}29
case &＃39;&＃xff14;&＃39;:30
{31
e.KeyChar &＃61; &＃39;4&＃39;;32
break;33
}34
case &＃39;&＃xff15;&＃39;:35
{36
e.KeyChar &＃61; &＃39;5&＃39;;37
break;38
}39
case &＃39;&＃xff16;&＃39;:40
{41
e.KeyChar &＃61; &＃39;6&＃39;;42
break;43
}44
case &＃39;&＃xff17;&＃39;:45
{46
e.KeyChar &＃61; &＃39;7&＃39;;47
break;48
}49
case &＃39;&＃xff18;&＃39;:50
{51
e.KeyChar &＃61; &＃39;8&＃39;;52
break;53
}54
case &＃39;&＃xff19;&＃39;:55
{56
e.KeyChar &＃61; &＃39;9&＃39;;57
break;58
}59
case &＃39;&＃xff10;&＃39;:60
{61
e.KeyChar &＃61; &＃39;0&＃39;;62
break;63
}64
default: break;65
}66
67
}68
#endregion
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