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  • C#textbox只能输入数字

    2010-12-04 00:06:53
    C#程序textbox控制只能输入数字,其他都输入不
  • private void textBox1_KeyPress(object sender, KeyPressEventArgs e) { TextBox txt = sender as TextBox; //屏蔽非法按键,只能输入小数 if ((e.KeyChar >= '0' &&a...
    private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
            {
                TextBox txt = sender as TextBox;
                //屏蔽非法按键,只能输入小数
                if ((e.KeyChar >= '0' && e.KeyChar <= '9') || e.KeyChar == '-' || e.KeyChar == '.' || e.KeyChar == 8)
                {
                    if (txt.Text.Contains(".") && e.KeyChar == '.')
                    {
                        e.Handled = true;             
                    }
                    else if (e.KeyChar == '-')
                    {
                        if (txt.Text.Length != 0)
                        {
                            e.Handled = true;
                        }
                    }             
                }          
                else
                {
                    e.Handled = true;
                }
            }  

     

    转载于:https://www.cnblogs.com/profession/p/4828922.html

    展开全文
  • c# Textbox 只能输入数字

    千次阅读 2009-06-25 17:32:00
    1、JS函数/*==================================================================Textbox只能输入数字==================================================================*/function limitNum(obj) { if ( !...

    1、JS函数

    /*
    ==================================================================
    Textbox只能输入数字
    ==================================================================
    */
    function limitNum(obj) {
        if ( !(((window.event.keyCode >= 48) && (window.event.keyCode <= 57)) || (window.event.keyCode == 13) || (window.event.keyCode == 46) || (window.event.keyCode == 45)))
        {
           window.event.keyCode = 0 ;
        }

        return ;
    }

     

    2、调用

    <asp:TextBox ID="TxtCount" runat="server" CssClass="text" Text='<%# Bind("Count") %>' style="ime-mode:disabled"  MaxLength="9" onKeyPress="return limitNum(this);"            Width="60px"></asp:TextBox>

     

    利用样式表(style="ime-mode:disabled" )可以防止切换成汉字输入法,也就是说只能使用英文输入法,这样就防止了输入汉字的情况。

    js脚本就是要限制键盘输入,只能填入数字、退格键、删除键和方向键。

    ascii码说明:
    8:退格键
    46:delete
    37-40: 方向键
    48-57:小键盘区的数字
    96-105:主键盘区的数字
    110、190:小键盘区和主键盘区的小数点
    189、109:小键盘区和主键盘区的负号

    13:回车
    9: Tab 就是那个把焦点移到下一个文本框的东东。

    展开全文
  • textbox 只能数字 C# VC2010
  • 找到需要设置的textBox控件的事件中的KeyPress事件(属性旁边那个闪电标志就是事件) 按以下输入 private void textBox3_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar != '\b')//这是允许...

    找到需要设置的textBox控件的事件中的KeyPress事件(属性旁边那个闪电标志就是事件)

    按以下输入

       private void textBox3_KeyPress(object sender, KeyPressEventArgs e)
            {
                if (e.KeyChar != '\b')//这是允许输入退格键
                {
                    if (e.KeyChar != '.')//这是允许输入小数点键
                    {
                        if ((e.KeyChar < '0') || (e.KeyChar > '9'))//这是允许输入0-9数字
                        {
                            e.Handled = true;
                        }
                    }
                }
            }

    展开全文
  • C#textbox只能输入数字和英文句号

    千次阅读 2018-06-28 15:11:43
    毫无疑问是keypress事件,我这边设置的是只能输入数字或者英文句号private void tbpianyi_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar != 8 &amp;&amp; !Char.IsDigit(e.KeyChar) &...

    毫无疑问是keypress事件,我这边设置的是只能输入数字或者英文句号

    private void tbpianyi_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (e.KeyChar != 8 && !Char.IsDigit(e.KeyChar) && e.KeyChar != 46)//如果不是输入数字就不让输入
        {
            e.Handled = true;
        }
    }



    KeyCode取值

    keycode    8 = BackSpace BackSpace
    keycode    9 = Tab Tab
    keycode   12 = Clear
    keycode   13 = Enter
    keycode   16 = Shift_L
    keycode   17 = Control_L
    keycode   18 = Alt_L
    keycode   19 = Pause
    keycode   20 = Caps_Lock
    keycode   27 = Escape Escape
    keycode   32 = space space
    keycode   33 = Prior
    keycode   34 = Next
    keycode   35 = End
    keycode   36 = Home
    keycode   37 = Left
    keycode   38 = Up
    keycode   39 = Right
    keycode   40 = Down
    keycode   41 = Select
    keycode   42 = Print
    keycode   43 = Execute
    keycode   45 = Insert
    keycode   46 = Delete
    keycode   47 = Help
    keycode   48 = 0 equal braceright
    keycode   49 = 1 exclam onesuperior
    keycode   50 = 2 quotedbl twosuperior
    keycode   51 = 3 section threesuperior
    keycode   52 = 4 dollar
    keycode   53 = 5 percent
    keycode   54 = 6 ampersand
    keycode   55 = 7 slash braceleft
    keycode   56 = 8 parenleft bracketleft
    keycode   57 = 9 parenright bracketright
    keycode   65 = a A
    keycode   66 = b B
    keycode   67 = c C
    keycode   68 = d D
    keycode   69 = e E EuroSign
    keycode   70 = f F
    keycode   71 = g G
    keycode   72 = h H
    keycode   73 = i I
    keycode   74 = j J
    keycode   75 = k K
    keycode   76 = l L
    keycode   77 = m M mu
    keycode   78 = n N
    keycode   79 = o O
    keycode   80 = p P
    keycode   81 = q Q at
    keycode   82 = r R
    keycode   83 = s S
    keycode   84 = t T
    keycode   85 = u U
    keycode   86 = v V
    keycode   87 = w W
    keycode   88 = x X
    keycode   89 = y Y
    keycode   90 = z Z
    keycode   96 = KP_0 KP_0
    keycode   97 = KP_1 KP_1
    keycode   98 = KP_2 KP_2
    keycode   99 = KP_3 KP_3
    keycode 100 = KP_4 KP_4
    keycode 101 = KP_5 KP_5
    keycode 102 = KP_6 KP_6
    keycode 103 = KP_7 KP_7
    keycode 104 = KP_8 KP_8
    keycode 105 = KP_9 KP_9
    keycode 106 = KP_Multiply KP_Multiply
    keycode 107 = KP_Add KP_Add
    keycode 108 = KP_Separator KP_Separator
    keycode 109 = KP_Subtract KP_Subtract
    keycode 110 = KP_Decimal KP_Decimal
    keycode 111 = KP_Divide KP_Divide
    keycode 112 = F1
    keycode 113 = F2
    keycode 114 = F3
    keycode 115 = F4
    keycode 116 = F5
    keycode 117 = F6
    keycode 118 = F7
    keycode 119 = F8
    keycode 120 = F9
    keycode 121 = F10
    keycode 122 = F11
    keycode 123 = F12
    keycode 124 = F13
    keycode 125 = F14
    keycode 126 = F15
    keycode 127 = F16
    keycode 128 = F17
    keycode 129 = F18
    keycode 130 = F19
    keycode 131 = F20
    keycode 132 = F21
    keycode 133 = F22
    keycode 134 = F23
    keycode 135 = F24
    keycode 136 = Num_Lock
    keycode 137 = Scroll_Lock
    keycode 187 = acute grave
    keycode 188 = comma semicolon
    keycode 189 = minus underscore
    keycode 190 = period colon
    keycode 192 = numbersign apostrophe
    keycode 210 = plusminus hyphen macron
    keycode 211 =
    keycode 212 = copyright registered
    keycode 213 = guillemotleft guillemotright
    keycode 214 = masculine ordfeminine
    keycode 215 = ae AE
    keycode 216 = cent yen
    keycode 217 = questiondown exclamdown
    keycode 218 = onequarter onehalf threequarters
    keycode 220 = less greater bar
    keycode 221 = plus asterisk asciitilde
    keycode 227 = multiply division
    keycode 228 = acircumflex Acircumflex
    keycode 229 = ecircumflex Ecircumflex
    keycode 230 = icircumflex Icircumflex
    keycode 231 = ocircumflex Ocircumflex
    keycode 232 = ucircumflex Ucircumflex
    keycode 233 = ntilde Ntilde
    keycode 234 = yacute Yacute
    keycode 235 = oslash Ooblique
    keycode 236 = aring Aring
    keycode 237 = ccedilla Ccedilla
    keycode 238 = thorn THORN
    keycode 239 = eth ETH
    keycode 240 = diaeresis cedilla currency
    keycode 241 = agrave Agrave atilde Atilde
    keycode 242 = egrave Egrave
    keycode 243 = igrave Igrave
    keycode 244 = ograve Ograve otilde Otilde
    keycode 245 = ugrave Ugrave
    keycode 246 = adiaeresis Adiaeresis
    keycode 247 = ediaeresis Ediaeresis
    keycode 248 = idiaeresis Idiaeresis
    keycode 249 = odiaeresis Odiaeresis
    keycode 250 = udiaeresis Udiaeresis
    keycode 251 = ssharp question backslash
    keycode 252 = asciicircum degree
    keycode 253 = 3 sterling
    keycode 254 = Mode_switch

    展开全文
  • C#限制textbox只能输入数字 C#限制textbox只能输入数字
  • C#textbox只能输入数字和小数点

    千次阅读 2011-12-22 11:00:10
     if (((TextBox)sender).Text.Trim().IndexOf('.') > -1)  e.Handled = true;  }  else  e.Handled = true;  }  else  {  if (e.KeyChar )  {  e.Handled = false;  }  } ...
  • private void TxtBox_KeyPress(object sender, KeyPressEventArgs e) {  e.Handled = !char.IsNumber(e.KeyChar);... (sender as TextBox).Tag = (sender as TextBox).Text;  }
  • //选择文本框的事件窗口,找到按键输入的方法KeyPress,双击建立新的方法。... /// textBox只能输入数字的处理方法 /// </summary> /// <param name="sender"></param> ...
  • 1 private void tbxStationID_KeyPress(object sender, KeyPressEventArgs e) 2 { 3 if ((e.KeyChar >= 48 && e.KeyChar <= 57) || (e.KeyChar >= 64 && e.Ke...
  • 内容索引:C#源码,字符处理,TextBox C#限制textbox只能输入数字,入门级的实例,高手请跳过吧,窗体中的TextBox只能输入数字类型,中文、英文字母以及符号都将被拒之门外,实际上也是比较常用的功能,希望对C#编程...
  • C# textBox控制输入 只能输入数字,, C# textBox控制输入 只能输入数字,,
  • C# textbox只能输入数字 是个不错的参考案例
  • C#文本框TextBox只有输入数字 C#文本框输入数字 C#文本框数字 C#TextBox只有输入数字 C#TextBox只能输入数字
  • C#Winform限制Textbox只能输入数字,很好用的一段代码
  • 主要介绍了C# TextBox控件实现只能输入数字的方法,本文使用TextBox的keypress事件实现这个需求,需要的朋友可以参考下
  • 平时总结的C# TextBox只能输入数字的几种常用方法,简单实用。
  • textbox只能输入数字 方法一:private void textBox7_KeyPress(object sender, KeyPressEventArgs e)//只能输入数字和.{ byte[] array = System.Text.Encoding.Default.GetBytes(e.KeyChar.ToString());...
  • //采购单价 private void TextBox_buyprice_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar != '\b') { if ((e.KeyChar >= '0' && e.KeyChar <= '9')) { .
  • private void textBox3_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == 0x20) e.KeyChar = (char)0; //禁止空格键 if ((e.KeyChar == 0x2D) && (((TextBox)sender).Text.Length == 0)...
  • C#textbox只显示数字,只能输入数字

    千次阅读 2010-12-21 10:59:00
    C#textbox只显示数字,只能输入数字
  • C# textBox限制输入数字

    千次阅读 2019-01-02 20:39:12
    限制输入数字 小Sa是个编程编程爱好者,一直在一点点学习相关的内容。最近在改之前师兄留下的软件,C#语言,遇上了限制textBox内容为数字的要求,于是随便写了点东西记录一下。 之前师兄留下的代码如下: private ...
  • C# TextBox控件只能输入数字

    千次阅读 2015-05-08 08:04:34
    C# TextBox控件只能输入数字 只需要在控件TextBox的keypress事件中写入如下代码即可满足要求: 代码如下: if (e.KeyChar == '.' && this.txbEnd.Text.IndexOf(".") != -1)  {  e.Handled = true;  } ...
  • privatevoidtxtAlarmPhone_KeyPress(objectsender,KeyPressEventArgse) { if((e.KeyChar<48||e.KeyChar>57)&&e.KeyChar!=8) { e.Handled=true; } } 设置只能输入数字
  • c#设置TextBox只能输入数字

    千次阅读 2013-07-17 18:44:08
    从百度知道里搜索到一条这样的帮助 ... 调用TextBox的KeyPress事件 private void txtUserId_KeyPress(object sender, KeyPressEventArgs e) { //如果输入的不是数字键,也不是回车键、Ba

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