在文本框中允许使用逗号和点字符 [英] Allowing comma and Dot characters in Textbox

问题描述

我希望文本框在KeyPress事件上允许字母，退格，空格，逗号和点...

请给我建议...

我的代码是这样的

I want textbox to allow letters,backspace,space,commas and dots on KeyPress Event ...

Please give me suggestion for this...

I have my code something like this

public void Check(Object sender, KeyPressEventArgs e)
        {
            if (!char.IsLetter(e.KeyChar))
            {
                e.Handled = true;
            }
            if (char.IsLetter(e.KeyChar) || e.KeyChar == (char)Keys.Back || e.KeyChar == (char)Keys.Space )
            {
&
                // These characters may pass
                e.Handled = false;
            }
            else
            {
                // Everything that is not a letter, nor a backspace nor a space will be blocked
                e.Handled = true;
            }


        }

推荐答案

最好为该文本框使用正则表达式. 通过此链接可以更好地理解正则表达式..

http://msdn.microsoft.com/en-us/library/ff650303.aspx [ ^ ]

希望您能理解..

Its better to use the regular expression for that text box ..
Go through this link it will better useful to you to understand regular expression..

http://msdn.microsoft.com/en-us/library/ff650303.aspx[^]

I hope you have got it..

http://www.regexlib.com/Search.aspx?k=special+characters&c=0&m=0&ps=20&p=2[^]

ues this link

您好，

Hi,

public void Check(Object sender, KeyPressEventArgs e)
       {
           //if (!char.IsLetter(e.KeyChar)||!char.IsNumber(e.KeyChar))
           //{
           //    e.Handled = true;
           //}
           if (char.IsLetter(e.KeyChar) || e.KeyChar == (char)Keys.Back || e.KeyChar == (char)Keys.Space || e.KeyChar=='.' || e.KeyChar==',' ||char.IsNumber(e.KeyChar))
           {

               // These characters may pass
               e.Handled = false;
           }
           else
           {
               // Everything that is not a letter, nor a backspace nor a space will be blocked
               e.Handled = true;
           }


       }

这篇关于在文本框中允许使用逗号和点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！