自定义数字文本框 [英] Custom Numeric TextBox

问题描述

我已经在C#.net中创建了一个数字文本框用户控件，它可以按我的需要工作，但是我无法使用Delete和Backspace按钮从该文本框中删除值.

I Have created a numeric textbox usercontrol in C#.net its working as i need but i m not able to delete values from that textbox using delete and backspace button

推荐答案

我不知道您的代码是什么样子，即使我在退格时被卡住了一次.这是仅允许数字值的代码示例-

I have no idea what your code looks like, anyway even I was stuck once while doing backspace. Here is a sample example of a code to allow only numeric values-

protected override void OnKeyDown(KeyEventArgs e)
{
    //To only allow numbers
    if (char.IsNumber((char)e.KeyValue) || (((char)e.KeyData) == '\b'))
    {
       e.SuppressKeyPress = false;
    }
    else { e.SuppressKeyPress = true; }
    }

看看If条件的第二部分-((char)e.KeyData) == ''\b'')
这将允许您在文本框中使用退格键.

希望这会有所帮助.

我已经创建了一个在我的博客中解释过的控件- ^ ]

Have a look at the second part of the If condition - ((char)e.KeyData) == ''\b'')
This will allow you to use backspace in your textbox.

Hope this helps.

I have created one such control explained in my blog here - http://tarundotnet.wordpress.com/2011/06/26/allow-numbers-or-letters-and-disable-right-click-in-textbox/[^]

这篇关于自定义数字文本框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！