限制在文本框中输入字符 [英] Restrict entering character in textbox

问题描述

如何限制用户在文本框中输入字符，该文本框专门用于输入移动号码.

How to restrict a user entering character in textbox,the textbox is exclusively for entering Mobile no.

推荐答案

private void txtType1_KeyPress(object sender, KeyPressEventArgs e)
{
     int isNumber = 0;
     e.Handled = !int.TryParse(e.KeyChar.ToString(), out isNumber);
}

或:

or:

private void txtType2_KeyPress(object sender, KeyPressEventArgs e)
{
     if (!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString(), "\\d+"))
          e.Handled = true;
}

看到这里:
http://www.vcskicks.com/numbers_only_textbox.php [

See here:
http://www.vcskicks.com/numbers_only_textbox.php[^]

Bhavna
尝试简单的解决方法

Hi, Bhavna
Try a easy solution

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if ((e.KeyChar >= 65 && e.KeyChar <= 91) || (e.KeyChar >= 97 && e.KeyChar <= 123))
            {
                if (i && e.KeyChar == 69)
                {
                    i = false;
                }
                else if (e.KeyChar!=69)
                {
                    e.Handled = true;
                }



                }
        }

还有更多方法可以找到，它的工作

there are some more ways you should find out, it''s work

使用正则表达式
跟随链接

http://www.dotnetspider.com/forum/140521-How-restrict-my-User-enter-only-characters-n.aspx [ http://aspdotnet-suresh.blogspot.com/2010/12/how-to-restrict-user-to-enter-only.html [ http://support.microsoft.com/kb/198649 [

Use Regular expressions
Follow the links

http://www.dotnetspider.com/forum/140521-How-restrict-my-User-enter-only-characters-n.aspx[^]

http://aspdotnet-suresh.blogspot.com/2010/12/how-to-restrict-user-to-enter-only.html[^]

http://support.microsoft.com/kb/198649[^]

这篇关于限制在文本框中输入字符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！