|
I do not see how this solution is any different from your static class. Sure, your not communicating directly with Form1 with your static class but you are still referencing properties used by Form1.
Plus if you call a function in form1 from form2 you get instant result (without need for focus) - you could also create an event in Form2 that form1 responds to.
I don't claim to have a better solution, just wanted to see if you could justify why the static class is a better option?
return 5;
|
|
|
|
|
Hey musefan,
The difference is the coupling between classes. The static configuration class has an application level scope, so the two UI form classes are complete decoupled with no knowledge of each other and that is the ideal way to develop forms like this. Granted that in the question here, we are dealing with a really simple scenario which is definitely satisfied by form1 setting a value in form2 directly. If and when the project grows, will Form1 have to know about Form2 and Form3 and Form4, but not Form5? Is the setting being changed in each form, or only 1, or 2? With a static configuration class Form1 only has to know about updating one ui based property in it and any class that needs knowledge of that value can simply read it when they need it. It makes for a much cleaner, stable, sustainable, and quicker executing code base.
I wasn't, now I am, then I won't be anymore.
|
|
|
|
|
But if Form1 has a function for settings whatever that any other form can call then no it does not need to know about Forms 2, 3 and 4 etc.
Also, with your approach of a static class. What if there are multiple instances of Form1? These may need different enabled states for controls and cannot therefore rely on a static class
BTW - I didn't vote your post
return 5;
|
|
|
|
|
But then Forms 2, 3 and 4 have to know about Form 1. What if somewhere in the future, another form gets created that can open Forms 2, 3 and 4. Now Forms 2, 3 and 4 need to have their code updated in order to deal the the new form, or Form 1 and the new form would have to be updated to inherit a common interface. The configuration settings class would need to be static in a standard winforms environment, but in the mdi environment, the config class could easily be instanced and sent around to the form constructors as a reference so that it is instance specific, but still allowing the forms to be decoupled. My point is that I have serious issues with having ui forms coupled tightly to others. The ui objects should be independent of all others and sharing of information should be done with "domain" level classes. It comes from years of "fixing" enterprise systems that were written with that tight coupling. I have a very good understanding of the pitfalls associated with this.
Anyhows.... I'm rambling because I'm bored and I have to be at work to hold the fort this week... Happy holidays to you.
I wasn't, now I am, then I won't be anymore.
|
|
|
|
|
But then if there is multiple forms that can open forms 2, 3 and 4 then they are likely to have a different UI, which means different properties in your static class and therefore you still have to update code in Forms 2, 3 and 4 to account for this.
I do agree with you about the disadvantages of linking forms in your scenario of Forms 2, 3 and 4 can be opened by multiple forms and they need to disable controls in there parent. But regardless of the methods mentioned here, they all require Forms 2, 3, and 4 to be updated when any new Parent Forms/Controls are created
The way I see it is that if Form 2 needs to disable any controls in Form 1 then the 2 forms are already quite related (even if not directly by code). Therefore I see the best logic in being that anything in Form2 that determines that state of controls in Form1 should be presented as a property/method. Then Form1 can query the values at any time and update its own control state (perhaps an update event or if it is a Dialog then on close/result)
So...
Form2 has a property InvalidData
Form2 has an event Update
Form1 listens for Update event and then if InvalidData then disable control
...but then when Form3 pops up, you have to update code in Form1 to check state of new Forms properties. I just cannot think why a child form would need to disable controls in a parent unless that form was specifically created for that parent form alone
Oops, now I'm rambling. Happy holidays
return 5;
|
|
|
|
|
|
Hello,
i've downloaded the STUN-Client from codeproject.com and want now to let two clients connect each other.
At first, i create a UdpClient and make a STUN-Query with that. After it, i send the mapped addresses to a server, which deploys them to the two clients. Now they want to connect each other and i make a UdpClient.Connect(mappedIP). This _should_ work, but the problem is, i only get messages from the STUN-Server. I send the data via "UdpClient.Client.SendTo(...)" to my client, but nothing works. I just get crptic messages from the STUN-Server. I've closed the UdpClient. Disconnected and so on, but nothing helps.
Has anybody a solution for me?
|
|
|
|
|
softwarejaeger wrote: i've downloaded the STUN-Client from codeproject.com
I assume this is from an article somewhere? If so, the appropriate place to ask this question is on the article forum. It's extremely unlikely that the author will just happen to stumble across your question and answer it. It's even less likely that somebody else will take the time to download this software, and debug it for you to see what's going wrong.
|
|
|
|
|
hey guys..i want to show 4 or 5 rows in a single cell..for example i have a firm name and it has 5 phone numbers at last.. the thing i want to do is when i list the firm names i want that kind of firm name will be written in a cell and in next cell its phone number will be listed..how i can do that
something like that..
vemedya.com
|
|
|
|
|
erdinc27 wrote: i want to show 4 or 5 rows in a single cell
Add 5 rows, and owner-draw your rows. Don't paint the borders on the "inner" rows, and you're set.
I are Troll 
|
|
|
|
|
hey friend..thanks for the reply..i tried but i couldnt find an owner-draw in properties or where i should set it ?
vemedya.com
|
|
|
|
|
It's not a property, it's a technique. It's described here[^] 
I are Troll 
|
|
|
|
|
hey friend..i tried that codes and as i understand here some columns are hidden only or i am wrong ?
vemedya.com
modified on Thursday, December 23, 2010 3:50 AM
|
|
|
|
|
erdinc27 wrote: hey friend..i tried that codes and as i understand here some columns are hidden only or i am wrong ?
Nope, you're right. You'd hide the borders of the cells that you want to merge 
I are Troll
|
|
|
|
|
I think I've been through most of the info on this site and msdn. Can someone point me to a good reference for using the ToolStripControlHost to host controls in a ToolStrip?
When I use ToolStripControlHost to host lets say a numeric updown control I don't get the attributes I expect. For example I get a text attribute instead of the value attribute?
tia
rafone
Statistics are like bikini's...
What they reveal is astonishing ...
But what they hide is vital ...
modified on Tuesday, December 21, 2010 10:49 AM
|
|
|
|
|
Maybe this[^] can help.
The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.
My latest tip/trick
|
|
|
|
|
|
sory frinde
if i load any image from picturbox and convert this image to grayscal image
why i can draw the histogram after convert sub image to grayscal image .
|
|
|
|
|
This is the third time that you have asked the same question.
You have been given lines of research in answer to your previous questions and yet you show no evidence of having done any work for yourself.
Please stop!
It is very doubtful that anyone will give you any code. Do your own research.
[Edit]
BTW: If you are going to ask questions on this site then learn to use more descriptive subject lines. "tell me" does not give anyone a clue what you want.
[/Edit]
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
|
|
|
|
|
Why? Because you seem to feel the need to!
|
|
|
|
|
I'll tell you it's been a tough couple of weeks. No actually I wont tell you because you wouldn't believe it even if I told you.
|
|
|
|
|
HI,
I want print selected row in datagridview where I am bind DataGridview using Arraylist as a datasource.
|
|
|
|
|
Sounds relatively straightforward. Are you having particular problems trying to implement that?
|
|
|
|
|
I have a CLR trigger that calls a stored procedure asynchronously and I'm trying to use the context connection from inside the stored procedures body but it fails to interact with the database. However, when I call the stored procedure in a normal fashion interactions using the context connection are successful.
Inside the stored procedure, I'm trying something like...
using (SqlConnection conn = new SqlConnection("context connection=true")) {
// stuff
}
Is using the context connection a no-no when a CLR procedure is called asyncronously?
|
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
