|
What do u want tell me in detail.
|
|
|
|
|
I thought I had.
I have a user control that inherits Panel called GraphicViewer.
I have a collection to populate.
In designer, I want the GraphicViewer Tasks list to be populated with a task that launches the ArrayTypeEditor.
|
|
|
|
|
I have a TreeView where each node has an model object in it's Tag property. When a node is selected, I show that object in a property grid.
There are only two levels to this structure, a Category object has a Name and a collection of Field objects, which is displayed as a Catetory Node with child Field nodes.
-Cat1
--Field1
--Field2
-Cat2
--Field3
--Field4
Problem is, the property grid allows you to modify the Fields collection in the property grid, and I can't identify a property grid event that will let me know that this has happened so that I can update the TreeView.
The Validating event fires when you alter a plain text field in the property grid, but not when a collection is modified.
Has anybody dealt with this before?
Try code model generation tools at BoneSoft.com.
|
|
|
|
|
Probably the safest way to do this is as follows:
Hook into the BeforeSelect event on the Treeview
In your BeforeSelectEventHandler,
move the PropertyGrid.SelectedObject into the prior SelectedNode Tag.
This will ensure that you capture all changes that occured in each object.
|
|
|
|
|
The objects are updated, that's not the problem. The problem is that the object in a Category node has 4 children in it's collection property, but the TreeView doesn't know that it needs to add a 4th child node. I can check the last node for changes when you move to another node, but I'd like to know the instant it happens so there's no confusion looking at the tree view wondering where my new child is. Does that make sense?
Try code model generation tools at BoneSoft.com.
|
|
|
|
|
SO if the user adds or removes items from the collection using the PropertyGrid the PropertyValueChanged event does not fire?
|
|
|
|
|
Nope, sounded reasonable to me too. It fires when you set the property grid's SelectedObject to another object.
Try code model generation tools at BoneSoft.com.
|
|
|
|
|
You could use the INotifyPropertyChanged technique (new to .NET 2.0, but easy enough to simulate in 1.x if necessary). In the setter of each property, call an OnPropertyChanged method passing in the name of the property as a string. In that method, fire an event which passes an event arg containing the property name. Then hook that event on the newly selected object and whenever it changes, either selectively repopulate the selected node's descendants, or just wipe the whole branch out and repopulate it with the object's current state.
Josh
|
|
|
|
|
Best I think I could do with this is publish events in the collection, and hook em on node select. That might work. Thanks for the idea.
Try code model generation tools at BoneSoft.com.
|
|
|
|
|
|
Holy crap BatMan! Even that doesn't work! PropertyGrid must clone everything in and copy it back out. The only explaination I can think of...
On node select, I hook add and remove events in the internal collection, and set the parent to the property grid. The events NEVER fire! I give up, I'll find a compromise to get around it.
Try code model generation tools at BoneSoft.com.
-- modified at 17:47 Thursday 29th June, 2006
Nah, that can't be... You can refer to the property grid's selected object, and the node's tag and get the same reference... I don't know what's going on, but property grid does seem to supress my events.
|
|
|
|
|
After referring to an article here, I was able to successfully build a TWAIN program and get pictures from a digital camera. I was told that it works with Windows2000 (and even as low as Windows98) but when I run the code I made in .NET, it doesn't work. Any suggestions or ideas?
I love to program!
|
|
|
|
|
Greetings!
I was wondering if I could get some direction to get me started in implementing a "copy/paste" of the properties of a UserControl.
In my application, I have 10 instances of a particular UserControl. This UserControl has, say, 10 properties. I would like to be able to use the right-click menu that I have for this UserControl and be able to copy the "settings" of one instance to any other instance of the UserControl.
From what I've read on MSDN, I understand that I have to make the UserControl class Serializable and that the variables that I do not copied can be excluded using the [NonSerializable] attribute, thus so:
<br />
[Serializable]<br />
<br />
public class ctlMyControl : ctlBaseControl<br />
{<br />
int nNum1;
float fNum2;
<br />
[NonSerializable]<br />
float fNum3;
<br />
} <br />
My question is how does one implement the actualy copy and paste?
What function(s) do I use to perform the copy and what function(s) do I use to paste?
Your help is appreciated!
Thanks!
|
|
|
|
|
Hi,
I am using a snmp manager component. it sends a broadcast request. the responses of the broadcast are reveived via an event called
snmp_OnResponse()event. All the response I received I am trying to store them in a arraylist. which I later want to use to do further processing.
But I have no way of knowing when I would have received all the responses.
I can make an assumption, by using snmp timeout , and waiting for that amount of time before proceeding to do anything. Is there a wait or sleep function which will reliquish control, and let OnResponse event handle all the incoming responses before proceeding with further function calls?
I would appreciate if you can suggest any other approach to solve this.
Thanks,
Arti
|
|
|
|
|
Maybe the System.Timers.ElapsedEventHandler would work for your situation
|
|
|
|
|
Yes, there is a Thread.Sleep(int) method in System.Threading namespace.
Best,
Jun
|
|
|
|
|
Ok I have two controls, Ok Control X and Control Y, I want control X to be able to raise in event that Control Y is listening for when Control Y hears this event it responds by raising an event/events Control X is listening for and in Turn Control X does some work or method call etc. Any help would be greatly appreciated. Thank you
|
|
|
|
|
X->Y->X->Y... Sounds like infinite looping here 
Best,
Jun
|
|
|
|
|
Yeah I am kinda confused myself but it shouldnt end up falling into an infinite loop. Ok here is a long explanation that hopefully will make it more clear.
I have a side bar with buttons on it, each button corresponding to a specific form that will be loaded in to a panel on the same form as the SideBar/ToolBar. Ok hope ur still with me...lol..Alright now these forms are independent of the Toolbar but the tools bars controls the user navigation from form to form. If a user clicks on one of the buttons(wanting to change to another form) I want to currently active form(the form that is being viewed) to know that an attempt to unload it and load another form is about to happen, if this form is at a critical point in its process it needs to be able to say NO dont change me yet and stop the process of the visual unloading of the form and prompting the user to finish whatever he needs to finish and they attempt a change later.
SOOO with all of that, that is why I have a Control X(toolbar) that wants to raise an event to control Y(Form in Panel), Control Y(Form in Panel) will listen for this event, if it is at a point of being able to allow a change then it sends a response back to the Control X(Toolbar) allowing the change of forms to happen. I hope this explains it more clearly. I understand what i need to do, i am just trying to find some code examples to begin to lead me down the right path to see if i am right or not.
Thanks for all the help.
|
|
|
|
|
Is the toolbar on a main form, which has also the instances of the forms?
Are you whant to hide the forms or dispose them, when changing to an other?
|
|
|
|
|
The unload of the forms is just a visual unload, the user can go back to a form and the same data should be showing on the form once it left. And yes the Toolbar is a control it self and is loaded onto the main form. The Toolbar/sidebar looks similar to Outlook 2003's sidebar, the sliding effect with the buttons and what not, if a button is click then the form in the viewing panel changes, but it should only change if the actively viewable form allows the change to happen, but that is at that specific forms discretion.
|
|
|
|
|
Does the active form just say no change now, or should the form finish automaticaly later?
|
|
|
|
|
The form will tell the toolbar, "I can't change now" etc. and the Tool bar will inturn get this response and give a response of its on to the User and stop the process of changing the actively viewable form. Tough problem huh, yeah i am having a tough time wrapping my brain around it too, but hey it is fun. Thanks for all the help i really appreciate this.
|
|
|
|
|
No fear,
we will find a solution!
|
|
|
|
|
I realy think its not so difficult.
1)
the main form gets all the instances.
2) you start with an default form1 in the panel.
3) all your form classes (Better to make a YourBaseForm) need an public Method
public virtual bool ReadyToChange() //You can override it in your specific form classes
{
if(//everything is ok == true)
{return true;}
else
{return false;}
}
4) the main form has an additional YourBaseForm instance, which is called actform.
5) at startup actform = form1
6) at the Click Events you just have to check:
if(actform.ReadyToChange)
{
formx.Show();
actform.Hide();
actform = formx;
}
else
{
//Message: Its not possible to change form.
}
Hope I got it now
All the best and good luck,
Martin
-- modified at 16:55 Thursday 29th June, 2006
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
