如何设置文本框仅接受带有两个小数位的数字 [英] How to set the text box accept only numbers with two decimal places

问题描述

大家好！

我想知道是否有办法只在我的文本框中接受只有两位小数的数字（例如：123.55）。我还没有尝试任何代码，但我搜索的是使用蒙版文本框。但我不喜欢使用它，因为我不知道它:)任何人都可以帮助我吗？在此先感谢！

Hi guys!
I would like to know if there is any way to accept only numbers with two decimal places (example: 123.55) only on my text boxes. I have not yet tried any code but what I have searched is using the masked text box. But I do not like to use it due to the fact that I do not know about it :) anyone can help me? Thanks in advance!

推荐答案

写下代码文本框按键事件如下

Writre code textbox keypress event like Below

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) &&
        (e.KeyChar != '.'))
    {
            e.Handled = true;
    }

    // only allow one decimal point
    if ((e.KeyChar == '.') && ((sender as TextBox).Text.IndexOf('.') > -1))
    {
        e.Handled = true;
    }
}

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