C# 如何以正确的方式使用 KeyPressEvent
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How to use KeyPressEvent in correct way
提问by gbk
try to create HotKeys for my forms
尝试为我的表单创建热键
code
代码
private void FormMain_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)Keys.Enter)
{
MessageBox.Show("e");
}
}
works for one key, but if I whant to use combination of keys like CTRL+N, try to use if (e.KeyChar == (char)Keys.Enter && e.KeyChar == (char)Keys.N)- but it's not working. I'm I right - using such code for keys combination?
适用于一个键，但如果我想使用像 CTRL+N 这样的键组合，请尝试使用if (e.KeyChar == (char)Keys.Enter && e.KeyChar == (char)Keys.N)- 但它不起作用。我是对的 - 使用这样的代码进行组合键？
EDIT
编辑
This code capture only first pressed key, but not combination - so if I press CTRL + Enter - code capture CTRL but not Enter Key - try to create additional ifbut - result the same...
此代码仅捕获第一个按下的键，而不是组合键 - 因此，如果我按 CTRL + Enter - 代码捕获 CTRL 但不是 Enter 键 - 尝试创建其他if但 - 结果相同...
Change event from KeyPressto KeyDown- now it's work
将事件从 更改KeyPress为KeyDown- 现在可以使用了
采纳答案by King King
For other combinations of Controland another letter, there is an interesting thing that, the e.KeyCharwill have different code. For example, normally e.KeyChar = 'a'will have code of 97, but when pressing Controlbefore pressing a(or A), the actual code is 1. So we have this code to deal with other combinations:
对于Control和另一个字母的其他组合，有一件有趣的事情，即e.KeyChar会有不同的代码。例如，通常e.KeyChar = 'a'会有 代码97，但Control在按下a(或A)之前按下时，实际代码是1。所以我们有这个代码来处理其他组合：
private void FormMain_KeyPress(object sender, KeyPressEventArgs e)
{
//Pressing Control + N
if(e.KeyChar == 'n'-96) MessageBox.Show("e");
//Using this way won't help us differentiate the Enter key (10) and the J letter
}
You can also use KeyDownevent for this purpose. (In fact, KeyDownis more suitable). Because it supports the KeyDatawhich contains the combination info of modifier keys and another literal key:
您也可以KeyDown为此目的使用事件。（其实KeyDown更合适）。因为它支持KeyData包含修饰键和另一个文字键的组合信息的 ：
private void FormMain_KeyDown(object sender, KeyEventArgs e){
//Pressing Control + N
if(e.KeyData == (Keys.Control | Keys.N)) MessageBox.Show("e");
}
回答by Kurubaran
try this for combination of Ctrl+ N,
试试这个Ctrl+ 的组合N，
if (e.Modifiers == Keys.Control && e.KeyCode == Keys.N)
{
MessageBox.Show("e");
}
