Develop Reference

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);
}
}

Dynamically create buttons and add events to it

I need to dynamically create buttons (one for loop) and add "onClick" and "doubuleClick" events on it.
I did it like this:
Button bt = new Button();
bt.Click += bt_Click;
bt.DoubleClick += bt_DoubleClick;
private void bt_Click(object sender, EventArgs e)
{
label1.Text = this.Text;
}
private void bt_DoubleClick(object sender, EventArgs e)
{
//some code
}
First: My "bt_Click" method gets "main form" text in "label1". In debugger I see that sender is a button. What is wrong with it?
Second: My "bt_DoubleClick" event do not react at all, am I doing something wrong here?
Any help is appreciated.

You should cast sender to Button to get the bt.Text:
Button bt = new Button();
bt.Click += bt_Click;
bt.Text = "click me";
bt.Location = new Point(100,100);
this.Controls.Add(bt);
private void bt_Click(object sender, EventArgs e)
{
label1.Text = (sender as Button).Text;
}
Buttons doesn't react to double click event. You can read it here in detail.

In response to the first question, if I understand you correctly, in this.Text, this refers to the form because the method bt_Click is a member of the Main Form class. I think you might have meant to do:
private void bt_Click(object sender, EventArgs e)
{
label1.Text = (Button)sender.Text;
}
Second: Is this just a case of the bt_Click handler firing twice?

The easiest way to do this it is to use "datagrid".
Datagread has the great support for all events and for organization of items (image, text and so on).
I have made "save" or "open" dialog form to browse content from remote SFTP server, very easy with datagrad, but I had a problem to do it with buttons or labels.

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);

Changing the function of a button click?

I know the answer is probably really obvious, but I'm having a complete brain fart here.
What I want to do is have a simple form with two buttons. The first button shows a message saying "1". After clicking the second button, the first button says "2" when clicked. After clicking the second button again, it goes back to saying "1".
Having learned programming with javascript, I'm still thinking in javascript. My first train of thought was:
myButton.onclick=...
After that the only thing I could think of was to have a conditional inside the first button's click function and use the second button's click to change a boolean...
Is there a better way to do this?

Make button2 change the method which is called when button1 is clicked:
private void button1_Click(object sender, EventArgs e)
{
Text = "1";
}
private void button1_Click2(object sender, EventArgs e)
{
Text = "2";
button1.Click -= button1_Click2;
button1.Click += button1_Click;
}
private void button2_Click(object sender, EventArgs e)
{
button1.Click -= button1_Click;
button1.Click += button1_Click2;
}

I understood, what happens when one click the button2 first time and for the second time. But if you want to say that its the pattern it has to follow, then:
Bool bln = true;
private void button2_Click(object sender, EventArgs e)
{
if(bln)
text1();
else
text2();
bln = !bln;
}
private void text1()
{
// Whatever
}
private void text2()
{
// Whatever
}
Populate the method with whatever you are looking for. In this, These methods can be reused for button1 click event also.
Hope it helps.

Have the second button's click handler set a message variable, and simply have the first button's click handler display it.

edit: I wrote this for asp.net. Converting to winforms shouldn't be difficult.
Declare a string variable:
public static mystring = "1";
on button2_click you can change that value. I am showing the simple case of changing it once permanently, but you can write code to alternate in any way you like:
protected void btn2_Click(object sender, EventArgs e)
{
mystring = "2";
}
For example, to alternate between 1 and 2, you can set the value of int n = 1, and have btn2 set the value to (3-n).ToString();
Then do:
protected void btn1_Click(object sender, EventArgs e)
{
Response.Write(mystring);
}

You have to do myButton.onclick-=function_name
+= is to add function
-= is to remove function

You can always make it work this way:
private void button1_Click(object sender, EventArgs e)
{
button1.Text = "Button 1 Text";
MessageBox.Show("B1 Function1");
button1.Click -= button1_Click;
button1.Click += button1_Click2;
}
private void button1_Click2(object sender, EventArgs e)
{
button.Text = "Button 1 Text 2";
MessageBox.Show("B1 Function2");
button1.Click -= button1_Click2;
button1.Click += button1_Click;
}

Calling click event of a button serverside

How can I click or load the click() event of a button in codebehind?
I already tried
btn.Click();
but this gives an error. I am using ASP.NET

I will assume that you have a button called Button1
and that you have double clicked it to create an event handler.
To simulate the button click in code, you simply
call the event handler:
Button1_Click(object sender, EventArgs e).
e.g. in your Page Load Event
protected void Page_Load(object sender, EventArgs e)
{
//This simulates the button click from within your code.
Button1_Click(Button1, EventArgs.Empty);
}
protected void Button1_Click(object sender, EventArgs e)
{
//Do some stuff in the button click event handler.
}

If you don't need the context provided by the sender and eventargs then you can just refactor to create a method (eg DoStuff()) and make your event handler just call that. Then when you want to call the same functionality from elsewhere you can just call DoStuff(). It really depends on whether you want to actually simulate a click or not. If you want to simulate a click then other methods are better.

Do you wish to call all the event handlers attached to the button, or just one?
If just one, call the handler:
btn.btn_Click(btn, new EventArgs());
If all of them, trigger the event:
var tmpEvent = btn.Click;
if (tmpEvent != null)
tmpEvent(btn, new EventArgs());

Try this:
YourButton_Click(sender, e);

Edit try this:
protected void Page_Init(object sender, EventArgs e)
{
Button1.Click += new EventHandler(Button1_Click);
}
void Button1_Click(object sender, EventArgs e)
{
}
in the .cs page

Just call the buttons click function.
http://forums.asp.net/t/1178012.aspx
Instead of trying to call the event just call the function that event uses.
Example: btn.Click() calls
btn_Click(object sender, EventArgs e)
so you should call the function btn_Click(btn,new
EventArgs());

It's been a long time ago, but here is my solution
You can use:
btn.PerformClick();

protected void Page_Load(object sender, EventArgs e)
{
functionName();
}
protected void btn_Click(object sender, EventArgs e)
{
functionName();
}
public void functionName()
{
//function code goes here, and call this function where ever you want
}
try this one.......

YourButton.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
This works for me.