C# 如何将字符串转换为键
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How to convert string to Keys
提问by gbk
try to implement combination of keypressing for my programm currently can detect required keypressed (in this postdescribed how) but only predefined in code, but I want to store setting in condig file then read it and use if pressed.
尝试为我的程序实现按键组合目前可以检测所需的按键（在这篇文章中描述了如何）但仅在代码中预定义，但我想将设置存储在 condig 文件中，然后读取它并在按下时使用。
Now can store it, and read as string - currently try to convert readed string to Keys, using next code:
现在可以存储它，并读取为字符串 - 当前尝试Keys使用下一个代码将读取的字符串转换为 ：
Storing in config file:
存储在配置文件中：
<add key="open" value="ControlKey,N"
<add key="close" value="ControlKey,Q" />
<add key="clear" value="ControlKey,D" />
<add key="settings" value="ControlKey,S" />
<add key="colorKey" value="ControlKey,K" />
<add key="fontKey" value="ShiftKey,T" />
<add key="defaultKey" value="ControlKey,P" />
and using it
并使用它
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
TypeConverter converter = TypeDescriptor.GetConverter(typeof(Keys));
string[] keyValueTemp;
keyValueTemp = cm.GetValueString("open").ToString().Split(',');
string key1 = keyValueTemp[0];
string key2 = keyValueTemp[1];
Keys keys1 = (Keys)converter.ConvertFromString(key1);
Keys keys2 = (Keys)converter.ConvertFromString(key2);
if (ModifierKeys == keys1 && e.KeyCode == keys2)
{
string keyPressed = e.KeyCode.ToString();
MessageBox.Show(keyPressed);
}
}
But, has next result -
但是，有下一个结果——
So - as you see - this convert control Key to Shiftkey, also try to use code if (ModifierKeys.ToString() == keyValueTemp[0] && e.KeyCode.ToString() == keyValueTemp[1]), but it's not work too.
所以 - 如你所见 - 将 control Key 转换为 Shiftkey，也尝试使用 code if (ModifierKeys.ToString() == keyValueTemp[0] && e.KeyCode.ToString() == keyValueTemp[1])，但它也不起作用。
if use this code
如果使用此代码
if (e.Modifiers == Keys.Control && e.KeyCode == Keys.N)
{
string keyPressed = e.KeyCode.ToString();
MessageBox.Show(keyPressed);
}
all works
所有作品
Q: how can i convert string to Keys and compare it with keyPressed events?
问：如何将字符串转换为 Keys 并将其与 keyPressed 事件进行比较？
EDIT
编辑
So found my mistake
所以发现我的错误
Keys key = (Keys)converter.ConvertFromString(keyValueTemp[0]);
Keys key2 = (Keys)converter.ConvertFromString(keyValueTemp[1]);
if (e.Modifiers == key && e.KeyCode == key2)
{
MessageBox.Show(e.KeyCode.ToString());
}
forget to add e- from event handler
忘记添加e- 来自事件处理程序
another way - as written by AccessDenied
另一种方式 - 正如AccessDenied所写
Keys key = (Keys)Enum.Parse(typeof(Keys), keyValueTemp[0], true);
采纳答案by Kurubaran
Key comparision is done with enumerations, So what you have to do is a String to Enumconversion.
键比较是用枚举完成的，所以你要做的就是String to Enum转换。
if (e.Modifiers == (Keys)Enum.Parse(typeof(Keys), "keys1", true)
&& e.KeyCode == (Keys)Enum.Parse(typeof(Keys), "keys2", true))
{
string keyPressed = e.KeyCode.ToString();
MessageBox.Show(keyPressed);
}
回答by Muhammad Umar
Keys key;
Enum.TryParse("Enter", out key);
回答by Sriram Sakthivel
I'll suggest you not to store keys in config as "ControlKey,N", rather store its value.
我建议您不要将配置中的键存储为“ControlKey,N”，而是存储其值。
Keys openKey = Keys.ControlKey | Keys.N;
int value = (int)openKey;//95
It integer representation is 95, So store in app.config as
它的整数表示是95，所以在 app.config 中存储为
<add key="open" value="95">//ControlKey|N
Keys open = (Keys)int.Parse(cm.GetValueString("open").ToString());
Here open will be Keys.ControlKey | Keys.N
这里开放将是 Keys.ControlKey | Keys.N
Then you can compare easily against e.KeyData
然后你可以很容易地与 e.KeyData
if(e.KeyData == open)
{
//Control + N pressed
}
回答by Markus1980Wien
I am doing it the following way. In app.config file I have the following
我正在按照以下方式进行操作。在 app.config 文件中，我有以下内容
<add key="KeyboardShortcut" value="Control+M" />
and to use it in my code-file
并在我的代码文件中使用它
public System.Windows.Forms.Keys ShortCutKeys
{
get
{
string keyboardShortcut = ConfigurationManager.AppSettings["KeyboardShortcut"];
System.Windows.Forms.Keys retval = System.Windows.Forms.Keys.None;
if (!string.IsNullOrEmpty(keyboardShortcut))
{
try
{
System.Windows.Forms.KeysConverter kc = new System.Windows.Forms.KeysConverter();
retval = (System.Windows.Forms.Keys)kc.ConvertFromInvariantString(keyboardShortcut);
}
catch (Exception ex)
{
log.Info(ex.ToString());
}
}
return retval;
}
}
And to detect if the key was pressed
并检测是否按下了键
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
try
{
if (this.ShortCutKeys != Keys.None && (keyData & this.ShortCutKey) == this.ShortCutKey)
{
this.Execute_Plugin();
}
}
catch(Exception ex)
{
log.Error(ex.ToString());
}
}
回答by overcomer
In addition of Muhammad Umar answer.
除了穆罕默德·奥马尔的回答。
For version 3.5 of .NET or before you can do
对于 .NET 3.5 版或之前的版本
Keys key = Enum.Parse(typeof(Keys), "Enter");
Be carefull to catch exceptions.
小心捕捉异常。
