如何在c#中使TextBox像超级终端一样处理文本

Question

当用户输入一个字符与文本框的焦点，我不希望字符显示在文本框上，我不想使用Clear()方法，因为可能有其他文本在文本框我不想擦除。到目前为止，我已经试过了:

private void WriteBox1_KeyPress(object sender, KeyPressEventArgs e)
{      
            if (e.KeyChar == (char)13) // enter key pressed 
            {
                WriteBox1.Text = "";
            }
             // Code to write Serial....
            String writeValues = WriteBox1.Text;
            String withoutLast = writeValues.Substring(0, 1);
            WriteBox1.Text = withoutLast;
}

这留下最后一个字母输入在writeBox1。我需要它删除输入的所有字符。我也累了:

writeValues.Replace(writeValues, "");
WriteBox1.Text = writeValues;

Answer 1

尝试在eventargs上设置已处理属性。将Handled设置为true以取消KeyPress事件。这可以防止控件处理按键。

的例子:

private void keypressed(Object o, KeyPressEventArgs e)
{
    // The keypressed method uses the KeyChar property to check 
    // whether the ENTER key is pressed. 
    // If the ENTER key is pressed, the Handled property is set to true, 
    // to indicate the event is handled.
    if (e.KeyChar == (char)Keys.Return)
    {
        e.Handled = true;
    }
}

https://msdn.microsoft.com/ru-ru/library/system.windows.forms.keypresseventargs.handled%28v=vs.110%29.aspx