处理2D扫描仪读取事件 [英] Handle 2D Scanner read event

问题描述

大家好，

我有一台USB 2D扫描仪，我想阅读PDF417条形码。

它返回一个Asscii代码，所以当我用记事本阅读时许多窗口开始打开。

我尝试使用与常规条码扫描器相同的代码和文本框并处理KeyDown事件但是也没有工作。

任何人都可以帮助如何阅读这个Ascii代码???

Hi All,
I have a USB 2D scanner, and I want to read PDF417 barcode.
It returns an Asscii code so when I read it using a notepad many windows start to open.
I tried to use the same code as the regular barcode scanner with a Textbox and handled the KeyDown event but did not work too.
Can anyone help how to read this Ascii code???

private void textBox1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                var result = textBox1.Text;
                MessageBox.Show(result.ToString());
            }

        }

但这不起作用。

推荐答案

你应该在keypress上做事件代替并取消键输出到文本框

You should do it at keypress event instead and cancel the key output to the textbox

private void TextBox1_KeyPress(object sender, KeyPressEventArgs e)
{
	Console.WriteLine(e.KeyChar.ToString()); //You can do other process here
	e.Handled = true;
}

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