keypress

问题 I am trying to mimic key press events, for instance Ctrl+D on a button click. It would be great if someone can point me in the right direction on how to achieve the same. 回答1: You're not allowed to do that. Imagine all the havoc I could wreak if I could send CTRL-ALT-DEL at will. 回答2: The code for triggering a custom event (in this instance, Ctrl+d) is as follows: var evt = jQuery.Event("keypress"); evt.keyCode = 100; // d evt.ctrlKey = true; $(document).trigger(evt); NB that, as the other

问题 Can anyone point me in the right direction to be able to simulate sms style typing using keypress on the number pad? I can get each number to print out a letter but am unsure of how to get my program to treat a number of keypresses on the same key as the same 'event' (i.e. scrolling through several letters if the key is pressed again within a period of (for example) 2 seconds). I have looked up multiple keypresses but always come up with key combinations (ctrl, alt, delete etc). 回答1: Firstly,

问题 I have a dialog that pops up as result of an error condition. I want the dialog to remain open for at least 30 seconds, and close 30 seconds after the last user input (mouse or keyboard) is received. I can implement this by checking the value returned by GetLastInputInfo and closing the dialog when this is more than 30 seconds ago, but if the dialog pops up when the user hasn't been at the mouse or keyboard for 30 seconds, the GetLastInputInfo test passes immediately, and the dialog closes

问题 I want to detect when tab key is pressed in a textBox and focus the next textbox in the panel. I have tried out keyPressed method and keyDown method. But when I run the program and debug those methods are not calling when the tab key is pressed. Here is my code. private void textBoxName_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Tab) { textBoxUsername.Focus(); } } private void textBoxName_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar==(char)Keys.Tab) {

问题 This is the code I currently have: private void textBox_KeyPress(object sender, KeyPressEventArgs e) { e.Handled = !char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar) && e.KeyChar != '.'; if (e.KeyChar == '.' && (sender as TextBox).Text.IndexOf('.') > -1) e.Handled = true; } 回答1: KeyPress isn't good enough to do this kind of validation. A simple way to bypass it is to paste text into the text box with Ctrl+V. Or the context menu, no key event at all. In this specific case, the TextChanged

问题 I need to implement OnLongClickListener for BlackBerry platform. It may be used for user input (ex phone keyboard implementation) or other functionality (navigation, rewind control, zoom control, etc). There are requirements: target control to listen - custom ButtonField it should be version compiliant with 4.5 and 4.6, so no touchEvents etc. configurable long click time Do you have some suggestions about concept and implementation? Also, what issues I can get in using multiple listeners for

问题 I have a PictureBox where I use the code below to move my object. I need to add a few buttons in the form, however when I start the program the arrow keys navigate through the buttons instead of my input keypresses. I've tried many ways like PictureBox.Focus() and PictureBox.Select() on Form.Load() , and disabling the arrow key navigation completely on this answer here, but my object will not move anymore. private void UpdateScreen(object sender, EventArgs e) { if (Input.KeyPressed(Keys.Right

问题 I'm new to coding and have decided to start with C#. I've decided to write a simple console program that will detect key press and if only Enter is pressed, it will show number. The problem is that you can just hold down key and it will continue to show numbers. What should I add to my code so program will detect only SINGLE presses and ignore if user is HOLDING the key? (I didn't find anything about this issue for CONSOLE C# , only for Forms one. Neither on this forum, nor in Web at all)

问题 Following problem: With my code I enter fullscreen mode by clicking on an image in a list. I moved my next-button and my prev-button to the edge of the screen via jQuery. But after leaving fullscreen mode I want them back in their original position. But how can I detect if the fullscreen mode has been cancelled? Here is my code: HTML: <div id="slider-control-left"><span id="slider-prev"></span></div> <div id="slider"> <ul class="bxslider"> <li><img ... /></li> ... <li><img ... /></li> </ul> <

问题 I got the following code to simulate volumemute keypress: [DllImport("coredll.dll", SetLastError = true)] static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo); byte VK_VOLUME_MUTE = 0xAD; const int KEYEVENTF_KEYUP = 0x2; const int KEYEVENTF_KEYDOWN = 0x0; private void button1_Click(object sender, EventArgs e) { keybd_event(VK_VOLUME_MUTE, 0, KEYEVENTF_KEYDOWN, 0); keybd_event(VK_VOLUME_MUTE, 0, KEYEVENTF_KEYUP, 0); } This code doesnt work. I know there's another