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Example of customizing shortcut keys in C# WinForm, _PHP tutorial
- WBOYOriginal
- 2016-07-13 10:09:171063browse
Example of customizing shortcut keys in C# WinForm,
Download the source code of this article: http://xiazai.jb51.net/201501/tools/cs-key-setting.rar
During the project development process, it is necessary to implement the custom shortcut key function in the software settings similar to Youdao Dictionary, as shown in the figure below:
When we press Ctrl+Alt+M one after another, the software will automatically display the shortcut keys in the text box.
The final effect is as shown below:
The core code is as follows:
private void keyDown(object sender, KeyEventArgs e)
{
StringBuilder keyValue = new StringBuilder();
keyValue.Length = 0;
keyValue.Append("");
If (e.Modifiers != 0)
{
if (e.Control)
keyValue.Append("Ctrl + ");
If (e.Alt)
keyValue.Append("Alt + ");
If (e.Shift)
keyValue.Append("Shift + ");
}
If ((e.KeyValue >= 33 && e.KeyValue <= 40) ||
(e.KeyValue >= 65 && e.KeyValue <= 90) || //a-z/A-Z
(e.KeyValue >= 112 && e.KeyValue <= 123)) //F1-F12
{
keyValue.Append(e.KeyCode);
}
else if ((e.KeyValue >= 48 && e.KeyValue <= 57)) //0-9
{
keyValue.Append(e.KeyCode.ToString().Substring(1));
}
This.ActiveControl.Text = "";
//Set the text content of the current active control
This.ActiveControl.Text = keyValue.ToString();
}
private void keyUp(object sender, KeyEventArgs e)
{
String str = this.ActiveControl.Text.TrimEnd();
int len = str.Length;
If (len >= 1 && str.Substring(str.Length - 1) == "+")
{
This.ActiveControl.Text = "";
}
}
Correspondence between e.KeyValue and characters
| 字符 | e.KeyValue |
| a-z|A-Z | 65-90 |
| F1-F12 | 112-123 |
| 0-9 | 48-57 |
| PageUp | 33 |
| PageDown | 34 |
| End | 35 |
| Home | 36 |
| 左(←) | 37 |
| 上( ↑ ) | 38 |
| 右(→) | 39 |
| 下( ↓ ) | 40 |
Next, set the _KeyDown and _KeyUp events for the textbox control respectively, and call the above two core functions in them.
As shown below:
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
KeyDown(sender, e);
}
private void textBox1_KeyUp(object sender, KeyEventArgs e)
{
KeyUp(sender, e);
}