Develop Reference

How to use a single button click event to call a method with different parameters

I have multiple button click events:
private void button1_Click(object sender, EventArgs e)
{
Procedure(1);
}
private void button16_Click(object sender, EventArgs e)
{
Procedure(16);
}
However, I want to achieve something like this:
private void button[i]_Click(object sender, EventArgs e)
{
Procedure(i);
}

In Winforms, there is a call to InitializeComponent() in the class constructor.
In that method (it will take you to the form designer if you put the mouse cursor on the method and right click > goto definition or F12) you will see how events are hooked up:
button1_Click += button1_Click...
You can simply subscribe the buttons click event to your Procedure method.
button1_Click += CallToProcedure;
How do you work out which button was clicking then? You simply get it off the sender argument in the parameter:
private void CallToProcedure(object sender, EventArgs e)
{
Button btn = sender as Button;
int i = Convert.ToInt32(btn.Name.Replace("button", string.Empty));
Procedure(i);
}

You can store the parameter you're passing to your button (i in your example) in the Button's Tag property then use something like this:
var senderButton = sender as Button;
if (sender != null)
{
Procedure((int) senderButton.Tag);
}

If you can rely on the naming, then simple:
private void button_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
int i = Convert.ToInt32(btn.Name.Replace("button", ""));
Procedure(i);
}

use button.Tag property, is designed for such cases.
read is doc / MSDN

Transfer a method to another method

I'm new here and I have a doubt. It is possible to transfer a method to another method?
private void button1_Click(object sender, EventArgs e)
{
}
private void c_Click(object sender, EventArgs e)
{
MessageBox.Show("Transfer OK!!!");
}
private void button2_Click(object sender, EventArgs e)
{
// c_Click ????? ------> button1_Click
}
By clicking on Button2, via code is included c_Click the content within the button1.
Finally, clicking on button1, I need to bring up the "Transfer OK" message. Is this possible?

private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("Default Message");
c.PerformClick();
}
private void c_Click(object sender, EventArgs e)
{
MessageBox.Show("Transfer OK!!!");
}
Button.PerformClick Method used to call button click event in any method

I think you can use something like this inside your button2_Click:
button1.PerformClick();
or
c_Click(sender, e);

private void button1_Click(object sender, EventArgs e)
{
c_Click(sender, e);
}

I honestly don't know if I understand your question but based on your comments:
I do not want to run "PerformClick ()" or anything similar. Basically,
it would delete the content of the button1_Click and include C_Click
content within the button1_Click.
Clicking on button1, I need to bring up the "Transfer OK" message.
Button2 will have code that will perform the deletion of button1
content and will include the contents of C_Click event. I guess it's
something using "Delegates" or similar.
You're probably not using the word "Content" in the Windows Forms sense of the word. What I get from that is that when you click button2, you want button1 to start acting like the c_Click button, correct?
If I get you correctly you need to simply remove button1's EventHandler for button1_Click and replace it with c_Click, like so:
private void button1_Click(object sender, EventArgs e)
{
}
private void c_Click(object sender, EventArgs e)
{
MessageBox.Show("Transfer OK!!!");
}
private void button2_Click(object sender, EventArgs e)
{
// c_Click ????? ------> button1_Click
button1.Click -= new EventHandler(button1_Click);
button1.Click +=new EventHandler(c_Click);
}
So that after you click button2, the next time you click on button1, it will do c_Click() instead of button1_Click()

one Click event for multiple buttons with Text property

I want to make a click event for a bunch of buttons. The problem is that I want to use the button's Text, and pass it to a function. Now the click event is passed a object sender. When I tried changing that to Button sender, it gave errors. But I don't know how else I can work with the senders Text.
Here is the normal code, which gave a single error:
private void guess_Click(object sender, EventArgs e)
{
guess(sender.Text);
}
I changed it to this, which gave errors:
private void guess_Click(Button sender, EventArgs e)
{
guess(sender.Text);
}
Question:
How can I work with the Button's Text property within this click event, which is a single click_event for multiple buttons?

Step 1: You need to subscribe to the Button Click event of all your buttons to the same EventHandler. so that button click on all your Buttons will fire the same `Event Handler.
Step 2: You need to cast the object sender into Button and then access its Text property to get the Button Text.
Try This:
button1.Click += new System.EventHandler(MyButtonClick);
button2.Click += new System.EventHandler(MyButtonClick);
button3.Click += new System.EventHandler(MyButtonClick);
private void MyButtonClick(object sender, EventArgs e)
{
Button btnClick = (Button)sender ;
guess(btnClick.Text);
}

Cast sender to type button.
Example:
private void guess_Click(object sender, EventArgs e)
{
guess(((Button)sender).Text);
}

You need to cast the sender object to the Button type and use that:
private void guess_Click(object sender, EventArgs e)
{
Button senderBtn = senderBtn as Button;
if(senderBtn != null)
{
guess(senderBtn.Text);
}
}

How do I make a button show the listbox when clicked?

I am making a form where if a button is clicked it will go to my list box and run the functions I have in there though I am a bit confused on how to make it realise when the button has been clicked and for the listbox to work. Here is my code >_>
private void button1_Click(object sender, EventArgs e)
{
}
public void ListBox_SelectedIndexChanged(object sender, EventArgs e)
{
Ping.PlayConsole();
}

You just need:
private void button1_Click(object sender, EventArgs e)
{
Ping.PlayConsole();
}
It's ok to call the same function under different handlers.

Try this :
private void button1_Click(object sender, EventArgs e)
{
ListBox_SelectedIndexChanged(sender,e);
}
Good Luck !!

private void button1_Click(object sender, EventArgs e)
{
ListBox.Focus();
Ping.PlayConsole();
}

Both event handlers share the same signature void (object , EventArgs), so they are call-compatible.
If you are connecting the event visually using the form designer:
Go to the Property Inspector's Events pane and instead of double-clicking it to create an event handler stub for button1.Click, click the dropdown box icon that appears on the right side. Visual Studio will show all the event handlers present in the form that have a compatible signature, you should be able to choose ListBox_SelectIndexChanged for the button1.Click handler. They will be sharing the same handler.
If you are connecting the handler by code then this should work too:
ListBox1.SelectIndexChanged += new System.EventHandler(ListBox_SelectedIndexChanged);
button1.Click += new System.EventHandler(ListBox_SelectedIndexChanged);

Button1 not being clicked on startup

I am having an issue with my WinForm application.
Below I have my code for my button that I want to click.
private void button1_Click(object sender, EventArgs e)
{
// Do code.
}
Now I want to run the program on start up, so I have this code below:
private void form_Load(object sender, EventArgs e)
{
this.button1_Click(object sender, EventArgs e);
}
But this does not work. It has red lines under the words: "sender", "EventArgs e"
What am I doing wrong, Please help me?
Any help would be greatly appreciated, thanks!

First if you want to click button that way you should do:
private void form_Load(object sender, EventArgs e)
{
button1.PerformClick();
}
Second,
it is not a good idea to do it anyway, better approach is to create common method that is call in button_click event and form_load event.