更改文本框的颜色并限制输入 [英] Change colour of textbox and restrict input

问题描述

我想更改任何输入字母的文本框的颜色，并且只允许数字值....

[edit]将标题从帮助我"更改为更具描述性的[/edit]

I want to change the color of my text box of any one enters the alphabet and want to allow only numeric value....

[edit]Changed title from "Help me" to more descriptive[/edit]

推荐答案

您需要验证输入的 onKeyPress .

根据需要处理事件，更改颜色并限制用户.
样本:

You need to validate what is entered onKeyPress.

Handle the event, change the color and restrict user as per you want.
Sample:

private void txtBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    // Validates integers n float
    if ((e.KeyChar > 47 && e.KeyChar < 58) || (e.KeyChar == 46) || (e.KeyChar == 8))
    {
      //Your logic here if needed
    }
    else
    {
      // Change the Color or show message 
      // MessageBox.Show("Please enter valid integer.");
    }
}

请不要发布带有帮助我"或需要帮助"之类的标题的问题-请尽量描述性，因为这会鼓励了解您问题的人回答，并且不会浪费那些没有的人的时间！
我更改了您的姓名以显示您的意思.

Please do not post questions with titles like "help me" or "help needed" - try to be descriptive as it both encourages those who know about your problem to answer, and doesn''t waste the time of those who don''t!
I changed yours to show you what I mean.

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