I have a textBox and search button, I would ask about how can I make the user can click Enter to start searching without need to go and click the search button?
This would be best practice
private void txtSearch_Enter(object sender, EventArgs e)
{
AcceptButton = btnSearch;
}
private void txtSearch_Leave(object sender, EventArgs e)
{
AcceptButton = null;
}
The Form has a property called "AcceptButton" that identifies a button that should be associated to the "Enter" keypress. Its considered the "default action" for the form.
More info here:
Windows Form - AcceptButton property
If you want to use something other than Enter/Return, you could also try:
private void EnterKeyAction()
{
// Search...
}
private void btnEnter_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)Keys.Return)
EnterKeyAction();
}
private void btnEnter_Click(object sender, EventArgs e)
{
EnterKeyAction();
}
Related
Scenario: Only If the user follow the path Click on ListView > Click on Button the Button1 do something.
In other word I want to check in Button1_Click(object sender, EventArgs e) if the previous focus was on ListView.
So I tried this:
private void ListView_Test_Leave(object sender, EventArgs e)
{
_focusedControl = null;
}
I want raise previous event except when this event is raised:
private void Button1_Click(object sender, EventArgs e)
{
if(_focusedControl == listView_Test)
{
// ...
}
}
Edit: I have a variable that holds a reference to the currently focused control:
private Control _focusedControl;
and I update it in this way:
private void ListView_Test_GotFocus(object sender, EventArgs e)
{
_focusedControl = (Control)sender;
}
If the user follow the path Click on ListView > Click on Button I want raise only the Button1_Click event, in all other case I want normal raise.
You could use a helper variable.
bool wasRaised=false;
private void Button1_Click(object sender, EventArgs e) { wasRaised=true;}
Then you can check that variable in your event, and only run if it is false.
i need to hide a ListBox when I focus out a textbox. if i click on a different control or use Tab key then the textbox's "Leave" event occurs. But if I click inside the form, on any free space, then focusout doesn't happen. i saw something called mouse capture but i cant implement it.
i tried this:
private void txtProduct_Enter(object sender, EventArgs e)
{
listProduct.Show();
UIElement el = (UIElement)sender;
el.CaptureMouse();
}
private void MouseClickedElseWhere(object sender, MouseEventArgs e)
{
if (e.Clicks >= 1)
{
txtProduct_Leave(sender, new EventArgs());
}
}
private void txtProduct_Leave(object sender, EventArgs e)
{
listProduct.Hide();
}
but obviously it shows error. how do i achieve this? any help?
I had to make click event for my groupboxes even if groupbox doesnt have a click event by default.
//my_page.designer.cs
this.groupBox2.Click += new System.EventHandler(this.groupBox2_clicked);
//my_page.cs
private void groupBox2_clicked(object sender, EventArgs e)
{
listProduct.Hide();
}
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btn0_Click(object sender, EventArgs e)
{
MessageBox.Show("called btn 0 click..");
KeyPressEventArgs e0 = new KeyPressEventArgs('0');
textBox1_KeyPress(sender, e0);
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
MessageBox.Show("called txtbox_keypress event...");
}
}
Am sorry if this is a silly question,I have just started to learn windows forms, I still find material on the internet confusing.I want to implement calculator. So when number button is pressed it should be filled in textbox. So I thought calling textBox1_keypress() event from button click event would work??? but its not working,
I can manually write the logic in button click event to fill text in text box but if i do so, i have to do the same thing in button1_KeyPress event too. so it would be duplication of code right??...so i thought solution was to call textBox1_KeyPress() event from both button click event and button key press event...but its not working .So what should i do???..is there any other approach which should i follow.
so it would be duplication of code right??
Yes, it would be. So you can do
private void btn0_Click(object sender, EventArgs e)
{
CommonMethod(e);
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
CommonMethod(e);
}
private void CommonMethod(EventArgs e)
{
//Your logic here.
}
The TextBox KeyPress event handler (textBox1_KeyPress) is called after the user presses a key. The KeyPressEventArgs parameter includes information such as what key was pressed. So calling it from your btn0_Click method isn't going to set the text for the TextBox.
Rather, you want to (probably) append whatever number the user pressed to the text already present in the TextBox. Something like
private void btn0_Click(object sender, EventArgs e)
{
textBox1.Text += "0";
}
might be closer to what you're trying to accomplish.
You could put the logic in an extra function like so:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btn0_Click(object sender, EventArgs e)
{
NumberLogic(0),
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
// I don't know right now if e contains the key pressed. If not replace by the correct argument
NumberLogic(Convert.ToInt32(e));
}
void NumberLogic(int numberPressed){
MessageBox.Show("Button " + numberPressed.ToString() + " pressed.");
}
}
You don't want to tie the events together like that.
A key-press is one thing, handled in one way.
A button click is something totally different and should be handled as such.
The basic reason is this,
The button doesn't know what number it is, you need to tell it that.
A key-press on the other hand, knows what number was pressed.
If you REALLY want to, for some reason, you could use SendKeys to trigger your key-press event in a round-about way, from the button.
SendKeys.SendWait("0");
I can suggest to you to use an Tag Property of the Buttons. Put in it the value of each button in Design mode or in Constructor, create one button event handler for all buttons and use Tag value:
Constructor:
button1.Tag = 1;
button2.Tag = 2;
button1.Click += buttons_Click;
button2.Click += buttons_Click;
Event hadler:
private void buttons_Click(object sender, EventArgs e)
{
textBox1.Text = ((Button)sender).Tag.ToString();
}
I have many controls in my form. for example 120 labels in one panel. and i want when user clicked on each label just call same function with same parameter.
Now i used like this :
private void label67_Click(object sender, EventArgs e)
{
ChangeToTextbox(sender);
}
private void label66_Click(object sender, EventArgs e)
{
ChangeToTextbox(sender);
}
private void label65_Click(object sender, EventArgs e)
{
ChangeToTextbox(sender);
}
private void label64_Click(object sender, EventArgs e)
{
ChangeToTextbox(sender);
}
now can i make easy way to call ChangeToTextbox function when user clicked in any label?
Add the same OnClick handler for all labels on the panel:
private void Form1_Load(object sender, EventArgs e)
{
panel1.Controls.OfType<Label>().ToList().ForEach(l => l.Click += label_Click);
}
private void label_Click(object sender, EventArgs e)
{
ChangeToTextbox(sender);
}
Find all your controls then just add the handler via code;
List<Control> controls = GetAllMyControls();
foreach(Control control in controls)
{
control.OnClick += (o, e) => { ChangeToTextBox(o); }
}
The syntax should be very similar for both web and winform solutions.
It can be easily achieved by using following approach: Pls give a try,
1) Go to Windows Forms Designer and click the first Label control to select it. Then hold down the CTRL key while you click each of the other labels to select them. Be sure that every label is selected.
2) Then go to the Events page in the Properties window. Scroll down to the Click event, and type label_Click in the box
3) Press ENTER. The IDE adds a Click event handler called label_Click() to the code, and hooks it to each of the labels.
private void label_Click(object sender, EventArgs e)
{
ChangeToTextbox(sender);
}
Reference: http://msdn.microsoft.com/en-us/library/dd553231.aspx
I have a label working as a button. I would like when I press a button the click event to this label to take action. for example
private void Label1_Click(object sender, EventArgs e)
{
MessageBox.Show("I pressed this label and showed me this messagebox");
}
Now I want when I press this button, the label1 click event to be performed
private void button1_Click(object sender, EventArgs e)
{
// I want when I press this button something like this happens
Label1.PerformClick();
}
private void button1_Click(object sender, EventArgs e)
{
Label1_Click(sender, e);
}
now if you want to show a message of which control was clicked all in one method do the following
private void label1_Click(object sender, EventArgs e)
{
Control control = (Control)sender;
var name = control.Name;
MessageBox.Show(string.Format("I pressed this {0} and showed me this messagebox",name));
}
Two ways to do this.
First:
private void button1_Click(object sender, EventArgs e)
{
Label1_Click(sender, e); // Just call the Label's click handler
}
Second:
// Bind the Label1_Click handler to the button1 Click event, as they both use the same delegate
button1.Click += new EventHandler(Label1_Click);
With the second approach, note that in C# delegates are multi-cast, so both the button1_Click handler and the Label1_Click handler will be called when the button is clicked, in the order they were bound.
private void button1_Click(object sender, EventArgs e)
{
//What the label click do:
MessageBox.Show("I pressed this label and showed me this messagebox");
}
Is that not easier?
Why do you want to do it ?
I think it would be easier for you to just include the lable click functionality with the button click. Maybe even separate each piece in their own method and call them from the button click. Here is how you'd call another click event.
private void button1_Click(object sender, EventArgs e)
{
label1_Click(sender, e);
}
public class MyLabel:Label
{
public void PerformClick()
{
OnClick(new EventArgs());//InvokeOnClick(this,new EventArgs());
}
}