I am planning to create a shortcut key to all my forms, I put this code to all my forms
public Form1()
{
InitializeComponent();
this.KeyDown +=new KeyEventHandler(Form1_KeyDown);
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
Button1.PerformClick();
}
else if (e.KeyCode == Keys.Escape)
{
button2.PerformClick();
}
}
private void Form1_Load(object sender, EventArgs e)
{
this.KeyPreview = true;
}
is there any way, so that I will not repeat this codes in all my forms,
thanks :)
Use Form Base Class ... there you can write the code and inherit all the forms from that Base Form.
Raise Base Class Events in Derived Classes (C# Programming Guide)
Related
There is no reaction on Tab shortcut in my app:
public class SomeWindow : Form {
// ...
private void someWindow_Load(object sender, EventArgs e) {
this.KeyPreview = true;
this.KeyDown += new KeyEventHandler(SomeWindow_KeyDown);
}
void SomeWindow_KeyDown(object sender, KeyEventArgs e) {
if (e.Control && e.KeyCode == Keys.B) {
// some actions
}
else if (e.KeyCode == Keys.Tab) {
// no reaction
}
}
}
I learned that Tab and direction keys are required some overrides, but all examples that I saw was related to textboxes. Any solutions for Tas as shortcut?
I have multiple form with the same design like:
In Form1{
Form2 = new Formtoopen();
Form2.Resize += new EventHandler(Form2_Resize);
Form2.FormClosing +=new FormClosingEventHandler(Form2_FormClosing);
}
and then the events:
In Form1{
protected virtual void Fly_Form2_Closing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
e.Cancel = true;
Fly_Form2.Hide();
}
}
protected virtual void Fly_Form2_Visiblechanged(object sender, EventArgs e)
{
//some code
}
}
I would like to add the Form2 Type in the EventArgs that is empty from now.
I think it would make my code simpler as I have multiple Form sharing the same code.
How could I do that? I thought about the event custom arguments way but i'm not sure with Type...
Could you help me?
Thanks
Here is something that works:
In Form1{
Form2 = new Formtoopen();
Form3 = new Formdata();
Form2.FormClosing +=new FormClosingEventHandler(Form_FormClosing);
Form3.FormClosing += new FormClosingEventHandler(Form_FormClosing);
}
In Form1{
protected virtual void Form_Closing(object sender, FormClosingEventArgs e)
{
if (e.CloseReason == CloseReason.UserClosing)
{
e.Cancel = true;
((Form)sender).Hide();
}
}
Retrieving the sender with cast Form from the object sender.
Thanks a lot M.Passant!
Today I'm having a problem with the keyup event not working on a custom theme.
public Main()
{
InitializeComponent();
tbResolveS2I.KeyUp += new KeyEventHandler(tbResolveS2I_KeyUp);
tbResolveI2S.KeyUp += new KeyEventHandler(tbResolveI2S_KeyUp);
this.KeyPreview = true;
}
private void tbResolveS2I_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
btnResolveS2I_Click(sender, e);
e.SuppressKeyPress = true;
}
}
When I hit enter on my keyboard it sends both textboxes to do the same result. What i mean is if i hit enter on the first textbox it will act like I'm pressing enter on the other textbox aswell
If you want different events to perform the same thing you could add that code to a method and just call that method from the controls event method.
Also in the theme pack you are using, the button extends from Control and does not have a PerformClick() method.
example:
public Main() {
InitializeComponent();
KeyUp += new KeyEventHandler(Main_KeyUp);
this.KeyPreview = true;
}
private void Main_KeyUp(object sender, KeyEventArgs e) {
if(e.KeyCode == Keys.Enter) {
CustomCode();
e.SuppressKeyPress = true;
}
}
private void btnResolveS2I_Click(object sender, EventArgs e) {
CustomCode();
}
private void CustomCode() {
//Perform code here
}
}
Okay so I created a method called KeyCheck(), that should check if a key is pressed (specifically the enter key) and if it is it will press button1.
Unfortunately when I call the method I am unsure what to pass along to it. I want it to know when the enter key is being pressed.
public partial class Form1 : Form
{
public void GameStart()
{
richTextBox1.WordWrap = true;
richTextBox1.SelectionAlignment = HorizontalAlignment.Center;
richTextBox1.Text = "Hello, Welcome to Grandar!";
}
public Form1()
{
InitializeComponent();
GameStart();
//What variable do I pass to KeyCheck Method?
KeyCheck();
}
private void KeyCheck(KeyPressEventArgs k)
{
if (k.KeyChar == (char)Keys.Enter)
{
button1.PerformClick();
}
}
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
}
}
Couple of things to note here:
a) Do you really want to be calling KeyCheck directly as your sample code suggests or should it be wired up as a handler on the form (where the info you're asking will be automatically provided - will require a change in signature to align with the standard handlers as you have in some of your other methods).
b) I don't think you'll be able to call the KeyCheck method like you're doing unless you hook up another event to capture the keypress and then pass it to this method, by newing up a new KeyPressEvent(...)
Therefore, to answer your question, I think you'll want something like (pseudo-code)
public Form1()
{
InitializeComponent();
GameStart();
// Wire up a handler for the KeyPress event
this.KeyPress += KeyCheck;
}
private void KeyCheck(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)Keys.Enter)
{
button1.PerformClick();
}
}
Check out this page: https://msdn.microsoft.com/en-us/library/system.windows.forms.control.keypress(v=vs.110).aspx
You'll want something similar to your other methods, with the sender object and the event args.
if (e.KeyCode < Keys.Enter) {
//Your logic
}
subscribe to this:
this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.KeyPress_Method);
and the method to check the Enter key:
void KeyPress_Method(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)13) // enter key
{
// your code
}
}
My question is:
How can I disable the hold a key down in a textbox control using C#?
e.g Boxxxxxxxxxxxxxxxxxxxxx
I don't want to allow user to repeat any character from the keyboard.
Any suggestion?
thanks
Just an extra note for everyone using KeyDown and KeyUp events to suppress key repeat. If you do this you need to exclude catching meta keys like Alt/Shift etc otherwise when those keys are held down the actual key you want will not be sent since this is a two key combination and KeyDown and KeyUp events catch all keys.
This applies to all two-key combinations.
I did not add all of the meta keys to the following example, just the most common ones.
You can easily add your own keys by adding them to the collection.
Extending on the post from BFree:
public partial class Form1 : Form
{
private static readonly System.Collections.Generic.ICollection<System.Windows.Forms.Keys) ExcludeKeys = new System.Collections.Generic.HashSet<System.Windows.Forms.Keys)()
{
System.Windows.Forms.Keys.None,
System.Windows.Forms.Keys.Shift,
System.Windows.Forms.Keys.ShiftKey,
System.Windows.Forms.Keys.LShiftKey,
System.Windows.Forms.Keys.RShiftKey,
System.Windows.Forms.Keys.Alt,
System.Windows.Forms.Keys.Control,
System.Windows.Forms.Keys.ControlKey,
System.Windows.Forms.Keys.LControlKey,
System.Windows.Forms.Keys.RControlKey,
System.Windows.Forms.Keys.CapsLock,
System.Windows.Forms.Keys.NumLock,
System.Windows.Forms.Keys.LWin,
System.Windows.Forms.Keys.RWin
}
private bool isKeyPressed = false;
public Form1()
{
InitializeComponent();
this.textBox1.KeyDown += new KeyEventHandler(textBox1_KeyDown);
this.textBox1.KeyUp += new KeyEventHandler(textBox1_KeyUp);
}
void textBox1_KeyUp(object sender, KeyEventArgs e)
{
if (!ExcludeKeys.Contains(e.KeyCode))
{
isKeyPressed = false;
}
}
void textBox1_KeyDown(object sender, KeyEventArgs e)
{
if (!ExcludeKeys.Contains(e.KeyCode))
{
e.SuppressKeyPress = isKeyPressed;
isKeyPressed = true;
}
}
}
You can use the SupressKeyPress property on KeyEventArgs:
public partial class Form1 : Form
{
private bool isKeyPressed = false;
public Form1()
{
InitializeComponent();
this.textBox1.KeyDown += new KeyEventHandler(textBox1_KeyDown);
this.textBox1.KeyUp += new KeyEventHandler(textBox1_KeyUp);
}
void textBox1_KeyUp(object sender, KeyEventArgs e)
{
isKeyPressed = false;
}
void textBox1_KeyDown(object sender, KeyEventArgs e)
{
e.SuppressKeyPress = isKeyPressed;
isKeyPressed = true;
}
}
bool prevent = false;
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
e.SuppressKeyPress = prevent;
}
private void textBox1_KeyUp(object sender, KeyEventArgs e)
{
prevent = false;
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
prevent = true;
}
I'm not familiar with the specifics in c# but I imagine something like:
while (keyIsDown){
//do nothing
}
would work. I would be surprised if there is no way to keep track of a key being pressed.