So, I would double click here on my designer
and it should create me the code, but well it doesn't. And there is no value changed event in the events either.
So if anyone knows how to fix this, it would be nice. (I doubt it) so how would I get around this? How would I go on about creating the code myself that should be created when I double click on it?
Click the form or control that you want to create an event handler for.
In the Properties window(F4), click the Events button
In the list of available events, click the event that you want to create an event handler for.
In the box to the right of the event name, type the name of the handler and press ENTER.
Add the appropriate code to the event handler.
To create an event handler in the code editor
Switch to the code editor by using one of the following techniques:
Create a new method like:
private void buttonName_Click(object sender, EventArgs e) { ... }
In the file YourFormName.Designer.cs find your button and add
this.buttonName.Click += new System.EventHandler(this.buttonName_Click);
Related
What I'm trying to do is get my winform to display a debug line when ever I click in my winform. However, when I do, nothing happens. I know how to get a button / other click event to happen. But what I need is to be able to click anywhere within my winform.
I've googled this for the past hour but can't see what I'm doing wrong. As far as I'm aware, this code should be correct in detecting a mouse click. This method is held withing the form1.cs class:
private void mouseClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
Trace.WriteLine("Mouse clicked");
}
I've tried setting brake points, but these don't get triggered either. What is it I'm doing wrong?
Sorry for the stupidly newbie question, but I am very new to winform programming.
How to add the EventHandler:
public Form1()
{
InitializeComponent();
// This line should you place in the InitializeComponent() method.
this.MouseClick += mouseClick;
}
Using the editor built-in to Visual Studio:
Go to the properties window (if you don't see it, press Alt + Enter).
Select the events icon (looks like lightning).
Double-click on the empty ComboBox to the right of Click.
You'll be taken to an empty method where you can put your code.
The method itself is correct. I think your actual problem is: you haven't added this method to MouseClick events.
In C# – and most other languages too – event is handled by an event handler. Windows forms and controls have events for all the events happening in your controls, such as OnClick or OnResize.
You can append methods to these events, and the methods will automatically get called when the actual event happens. Simply add the following line to your form's constructor, Form_Load-method, InitializeComponent-method, or such:
this.MouseClick += mouseClick;
Now when ever MouseClick event happens, your method mouseClick will be called automatically.
I would recommend reading Events C# Programming Guide. You need to add an event handler like so:
form1.MouseClick += mouseClick;
I have a textbox in Form and i want to detect when the text has changed but the code I have found is giving me no joy.
I am probably missing something in the proporties or something you have to define before.
Here is my code:
private void tbxparkingTimesS1_TextChanged(Object sender, EventArgs e)
{
MessageBox.Show("You are in the ToolStripItem.TextChanged event.");
}
Thanks for any help with this trivial problem.
To wire the TextChanged event to a particular method inside your code do the following
Click on the TextBox inside your form
Open the properties windows (press F4 or menu View -> Property Window )
Select the event page (lightning icon)
Double click on the TextChanged property line
Insert your code inside the template build for you by Visual Studio
Have you assigned the event handler to the textbox?
Normally this will be done "behind the scenes" by Visual Studio - with the result being an additional line of code in your .designer file.
Something like:
this.tbxparkingTimesS1.TextChanged += new System.EventHandler(tbxparkingTimesS1_TextChanged);
(It['s been a while since I've done webforms - so that might be slightly off)
Double Click on Text box it will generate text change event for you.
private void tbxparkingTimesS1_TextChanged(object sender, EventArgs e)
{
// implement your code here.
}
When you double click VS will create event handler in your designer.cs file as bellow
this.tbxparkingTimesS1.TextChanged += new System.EventHandler(this.tbxparkingTimesS1_TextChanged);
You can do the same by using property window events or create event on code behind.
I was wonder how can I fire an event when the user double click on my webbrowser component. Since it has no such event how it could be possible...
Thanks in advance
Sounds like a WPF matter :-)
There you would go with an Behaviour attached to the browser. See this link for more information about this approach if you can alter your application (dependends on what you have done yet).
If you can't apply this solution, just bind a event handler to the click event and count click per time with respect to the mouse movement since the last click and if both conditions are true (two clicks in 0.2 secs, mouse hasn't moved more than 2px, for example) execute your double click code. The events you should use are previewMOUSEdown or MOUSEdown, not KEYdown.
// Call this where you want to create the event (let's say on the form load for example).
webBrowser1.DoubleClick += new EventHandler(webBrowser1_DoubleClick);
// This happens when the event is fired (so when you double click on the webbrowser control).
void webBrowser1_DoubleClick(object sender, EventArgs e)
{
// Code
}
Try this.
I don't know why you can't set this event via the designer :(, but this should work.
Could anyone please explain what and how this code below is doing/working?
RoleEnvironment.Chaning += RoleEnvironmentChaning;
private void RoleEnvironmentChanaing(object sender, RoleEnvironmentchaningnEventArgs e)
{
......
}
basically, if you could walk me through how event handling works in c#.net will be greatly appreciated.
Thanks.
Let's forget about C# for a second and think about the following scenario.
You have a button on the screen that you want the user to click, you don't know when the user will click the button and neither do you want to check constantly if the user has clicked the button. What you want to do is run a bit of custom code when the user does eventually click on a button.
Welcome to events or delegates.
Let's take a look at the button.
The Button has a Click event that you can hook your custom code onto.
i.e.
//This happens in the designer
Button button = new Button();
button.Click += new EventHandler(YourMethod);
Your method will now be called once the button has been clicked.
What happens on Click of the button? Someone will check whether or not there are subscribers to the event
if(Click != null)
{
Click(this, someEventArguments);
}
Basically that's saying: whenever the RoleEnviroment decided to trigger the "changing" event, call that method. (I assume it should be Changing rather than Chaning or Chanaing as per your code.)
In other words, events in C# are an implementation of the publisher/subscriber or observer pattern.
See my article on events and delegates for more information.
Some first page search results:
http://www.codeproject.com/KB/cs/csevents01.aspx
http://www.c-sharpcorner.com/UploadFile/ddutta/EventHandlingInNetUsingCS11092005052726AM/EventHandlingInNetUsingCS.aspx
http://msdn.microsoft.com/en-us/library/aa645739%28VS.71%29.aspx
Im designing a dialerPad form using Windows form, there is a textbox which should only take numbers and not text, my problem is that when i add the code
private void txtDialedNumber_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
//Blaah Blaah Code;
}
but its not getting registered in the other DialPad.Designer.CS page. For example the fallowing code registers TextChangedEvent
this.txtDailedNumber.TextChanged += new System.EventHandler(this.txtDailedNumber_TextChanged);
Can anybody help me on this?
You should never change *.designer.cs files manually.
What you should be doing is opening the design view of your form, selecting the object, and then setting the event handler in the objects properties:
Alternatively, if you want to register event handler manually (instead of using the designer), just put it under the InitializeComponent() call in the constructor for your form.
I would try to simplify Greg's answer.
Select the text box > go to properties > events tab> KeyPress Event > select the method this.txtDailedNumber.KeyPress
You are done.