Develop Reference

How to trigger DrillThrough with Report Viewer

I'm using ReportViewer with my WPF application.
I'm trying to trigger a function within my c# code and the button will be on the ReportViewer.
I'm wondering how do I trigger the DrillThrough?
void DemoDrillThroughEventHandler(object sender, DrillthroughEventArgs e)
{
MessageBox.Show("Drillthrough worked");
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
try
{
this._reportViewer.Drillthrough += new DrillthroughEventHandler(DemoDrillThroughEventHandler);
this._reportViewer.Reset();
....
this._reportViewer.LocalReport.Refresh();
this._reportViewer.RefreshReport();
}
}

Sometimes there is a method what rises event (OnSomething, to example, in winforms there is Button.PerformClick). Otherwise you can put code from event handler in separate function and call it directly.
Simplest solution to call it
DemoDrillThroughEventHandler(this._reportViewer, new DrillthroughEventArgs());
or even (depends on what is going on inside)
DemoDrillThroughEventHandler(null, null);

Is there a better way to close buttons on click?

I'm a beginner and have an assignment in which I must program the game of NIM. I begin with 15 "tokens" and at each turn a maximum of three can be removed, or "hidden". So far I am hiding these tokens on click by doing the following.
private void button1_Click(object sender, EventArgs e)
{
button1.Visible = false;
}
private void button2_Click(object sender, EventArgs e)
{
button2.Visible = false;
}
I simply copied and pasted that multiple times and changed the button numbers so that my buttons will close on click. This might be obvious, but is there a more efficient way to do this, instead of having 15 button close methods?

You can use the same click event for every single button, and make use of the sender object, casting it to Button:
private void buttonsToClose_Click(object sender, EventArgs e)
{
((Button)sender).Visible = false;
}
Then just add that handler to every single button you want to close itself on click.
Note, though, that this will throw an InvalidCastException if you or anyone else uses this handler on an object that is not a Button, so if you're actually going to use this code I would add some sort of conditional to check the real type of the sender.
Additionally, you could reuse this for any Control object by casting sender to Control instead, given that Button inherits from Control, and all Control objects have the Visible property. Here's an example, with a conditional to guard against an invalid cast:
private void controlToMakeInvisible_Click(object sender, EventArgs e)
{
if (sender.GetType() == typeof(Control))
{
((Control)sender).Visible = false;
}
}
A final note - it seems from your post like you may have a slight misunderstanding about the way events are created and wired in with objects in Windows Forms. If you go into the Designer, add a click event, and see it pop into your Form code as follows:
private void button1_Click(object sender, EventArgs e)
the name of this method has no bearing on its function. The button1 part of button1_Click doesn't actually have any logical linkage with the Button button1 - it's just the default name assigned by the Designer. The actual assignment of the method button1_Click to the Button.Click event is auto-generated into your Form's Designer.cs method.
The point of this is that if you copy and paste button1_Click and change every incidence of button1 with button2, like so:
private void button2_Click(object sender, EventArgs e)
{
button2.Visible = false;
}
it's not going to fire when button2 gets clicked. In actual fact, it's never going to fire at all, because the method hasn't actually been connected to any controls/events.

just call your event in a foreach loop.
private void Form1_Load(object sender, EventArgs e)
{
foreach (var button in Controls.OfType<Button>())
{
button.Click += button_Click;
}
}
void button_Click(object sender, EventArgs e)
{
((Control) sender).Visible = false;
}
if you change:
Controls.OfType<Button>()
to
Controls.OfType<Control>()
it will set visible to false for any Control. so you can control what item you want the event to be raised for easily.
OfType summary: Filters the elements of an IEnumerable based on a specified type.

Remove redundancies in code

I'm still new at this so I will try to explain my problem the best I can. English is not my first language so I apologize if I use some terms incorrectly.
I have a 100 line code that is executed every time a button is pressed. My problem is, I have 20 buttons and they all contain the same code (they are only slightly different in means of grabbing info from different source). Is there any way to do this instead of copying the same code too many times.
Basically my code is this:
private void button1_Click(object sender, EventArgs e)
{
//file data source url
sourceUrl = ("www.myurl.com")
//Grab data
code
code
code
//Store data
code
code
code
//Write data
code
code
code
}
Every button has the same code except for the "sourceUrl" part. If I want to add more buttons I have to copy>paste the whole code and my application is starting to get HUGE. Is there any way to shrink the code by only having the code once, and then calling an action or method every time the button is pressed. So instead of having 100 line code multiple time, I'll have one line code for each button and one 100 line code on the top that will be the source for that one line code.
Thanks in advance

Use the Tag property of your buttons to store the source url string and then set, for every button, the same event handler
private void buttonCommonHandler_Click(object sender, EventArgs e)
{
Button b = sender as Button;
CommonMethod(b.Tag.ToString());
}
private void CommonMethod(string sourceUrl)
{
// Execute the common code here....
}
You could set the common handler and the Tag using the form designer window or you could do that dynamically mimicking the code prepared for you by the designer in the InitializeComponent call
button1.Click += buttonCommonHandler;
button1.Tag = "www.myurl.com";
button2.Click += buttonCommonHandler;
button2.Tag = "www.anotherurl.com";

That's what functions are for. Use this layout:
private void YourFunc(string sourceUrl)
{
//Grab data
code
//Store data
code
//Write data
code
}
Now your buttons' event handlers look like this:
private void button1_Click(object sender, EventArgs e)
{
YourFunc("www.myurl.com");
}
private void button2_Click(object sender, EventArgs e)
{
YourFunc("www.myurl2.com");
}

Sure there is a way. Just make the whole function a function that takes the url as a string parameter. And then call that function from your code behind.
private void button1_Click(object sender, EventArgs e)
{
//file data source url
ProcessData("www.myurl.com");
}
private void ProcessData(string sourceUrl)
{
//Grab data
code
code
code
//Store data
code
code
code
//Write data
code
code
code
}

Here we can use use CommandName property, by passing URL in every button's CommandName property and passing it as a parameter to your Common Method to fetch data , So you can create a single function and call it through you btn_Click event .
<asp:Button ID="button1" runat="server" Text="clickMe"
CommandName="put your URL here" OnCommand="button1_Click" />
<%--OnClick="button1_Click" />--%>
See here we can pass your 'URL' in CommandName property ,few things to keep in mind , Here we are using OnCommand event rather than OnClick event of button , so that we can use 'CommandName' property here .1. OnCommand MSDN
2. Commandname MSDN
// private void button1_Click(object sender, EventArgs e)
private void button1_Click(object sender, CommandEventArgs e)
{
string sourceUrl = Convert.tostring(e.CommandName)
// Call function to grab data pass URL as parameter.
GrabDate (sourceUrl ) ;
So now we can get the URL value from button CommandName property .
3 . EventArgs Class
4 .CommandEventArgsClass

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);

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.