wpf 我如何关闭大写锁定键
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How do i Turn OFF the Caps lock key
提问by Bülent Ala?am
How do i Turn OFF the Caps lock key in textbox. I am using WPF forms.
如何关闭文本框中的大写锁定键。我正在使用 WPF 表单。
When textbox is focused I want to turn off caps lock.
当文本框聚焦时，我想关闭大写锁定。
Thanks
谢谢
回答by Sunny
Its easy , Firstly add namespace
很简单，首先添加命名空间
using System.Runtime.InteropServices;
then declare this in the class
然后在类中声明这个
[DllImport("user32.dll")]
static extern void keybd_event(byte bVk, byte bScan, uint dwFlags,
UIntPtr dwExtraInfo);
Finally , at textBox_Enter event add this code
最后，在 textBox_Enter 事件添加此代码
private void textBox1_Enter(object sender, EventArgs e)
{
if (Control.IsKeyLocked(Keys.CapsLock)) // Checks Capslock is on
{
const int KEYEVENTF_EXTENDEDKEY = 0x1;
const int KEYEVENTF_KEYUP = 0x2;
keybd_event(0x14, 0x45, KEYEVENTF_EXTENDEDKEY, (UIntPtr)0);
keybd_event(0x14, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP,
(UIntPtr)0);
}
}
this code will turn off the Capslock .. I have used it at the enter event you can add it according to your requirement!
此代码将关闭 Capslock .. 我在输入事件中使用过它，您可以根据需要添加它！
Checkout this link here
在此处查看此链接
回答by Bülent Ala?am
Use this code for WPF froms.
将此代码用于 WPF froms。
private void txt_KeyDown(object sender, KeyEventArgs e)
{
if (Keyboard.GetKeyStates(Key.CapsLock) == KeyStates.Toggled) // Checks Capslock is on
{
const int KEYEVENTF_EXTENDEDKEY = 0x1;
const int KEYEVENTF_KEYUP = 0x2;
keybd_event(0x14, 0x45, KEYEVENTF_EXTENDEDKEY, (UIntPtr)0);
keybd_event(0x14, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP,
(UIntPtr)0);
}
}
