C#阅读文本框忽略字符 [英] C# Reading Textbox ignoring characters

问题描述

大家好，我有一个如下的按键事件

Hi everyone i have a key down event as follows

if (e.KeyCode == Keys.C && e.KeyCode == Keys.Enter || e.KeyCode == Keys.Return)
{
    var amount = textBox1.Text;
    var total = label3.Text;
    decimal damount = Math.Round(Convert.ToDecimal(amount), 2);
    decimal dtotal = Convert.ToDecimal(total);
    var ntotal = dtotal - damount;
    var ndue = Math.Round(Convert.ToDecimal(ntotal), 2);
    var ntotal1 = Convert.ToString(ndue);
    if (ndue <= 0)
    {
        panel4.Show();
        label4.Text = ntotal1;
    }
    else
    {
        label3.Text = ntotal1;
    }
    textBox1.Text = "";
    textBox1.Focus();
}

此事件的工作方式与我想要的一样，但这是我的问题，当我读取textbox1.text忽略字符(例如c或a)时，我该怎么办，因为键降要求c会与我的十进制转换混淆任何建议

this event works like i want it but here is my question how do i when reading the textbox1.text ignore character such as c or a , since the keydown requires c it messes with my decimal conversion any suggestions

推荐答案

要防止按键继续前进，请将e.SuppressKeyPress = true; e.Handled = true;添加到处理程序中.

Add e.SuppressKeyPress = true; e.Handled = true; to your handler when you want to prevent the key press from going forward.

顺便说一句，您的if语句等效于if (e.KeyCode == Keys.Return)，因为它永远不会等于C和Enter.

As an aside, your if statement is equivalent to if (e.KeyCode == Keys.Return), since it will never be equal to both C and Enter.

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