C#中WinForm TextBox中数字的keypress事件 [英] keypress event for number in WinForm TextBox in C#

问题描述

我想限制用户仅在TextBox中键入数字. 我在按键事件中添加此代码:

I want to limit user to type just numbers in TextBox. I add this code In keypress Event:

private void txtPartID_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (((e.KeyChar >= '0') && (e.KeyChar <= '9')) == false)
        {
            e.Handled = true;
        }
    }

，但是在此之后，BackSpace键不适用于此TextBox.我该如何更改?

but after that BackSpace key don't work for this TextBox. How can I change this?

推荐答案

您可以使用此方法检查退格，

You can check for backspace using this,

if(e.KeyChar == '\b') 

一种更好的仅检查数字的方法是

And better way to check only for numbers is

private void txtPartID_KeyPress(object sender, KeyPressEventArgs e)
    {
        e.Handled = !(Char.IsNumber(e.KeyChar) || e.KeyChar == 8);
    }

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