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Both approaches seem to be doing essentially the same thing. We both have a base class that worries about reading the correct values and supplying them to the derived class that does the actual work.
New derived classes can be added to either one just as easily once all the appropriate plumbing is taken care of (class factory, suitable base class etc). In my case, I have to add an additional entry to the app.config to tell it the name of the class so the class factory can find and create it, but other than that, both methods are very similar.
The biggest difference that I can see is that I've given each service its own section, while you have given each service its own prefix (I keep global settings in the <appSettings> section). The end result is functionally the same so I guess it all comes down to whether you prefer swings or roundabouts 
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Alrightie. I was just concerned that there was something fundamental I was missing out on, while in essence, it's a matter of personal preference. I have an idea - why don't you post an article about how you do it, and I'll post an article about how I do it, and we'll link to each other's article.
BTW, I'm interested in your class mapping deal too.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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I just might write an article about it... I can't promise when I'll get to it though as I never seem to have enough time to get anything finished at the moment!
I'll certainly add it to my list of things to do though.
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How do you guys handle exceptions that are caught in your custom data classes. For instance, I have a business class and if an exception is thrown during one of it's methods..I don't really want to pop up a messagebox (since this class could be used in something other than a windows form app). A lot of methods are void (return nothing) so returning the exception to the caller is not an option either ( and is probably bad practice).
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I think I figured it out..I was having a brain fart. I simply re-throw the exception to the caller.
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Hi, i got my menu like this
File | Staff | Catalogue | Inventory | etc etc etc
For example, when i click Staff, i have Register staff, modify staff, delete staff, search staff
Lets say i click Search staff, the below code is executed. But when i click search staff again, 2 of the same form appear. How do i prevent that, if one of the search staff is open, cannot open again
private void mnuSearchStaff_Click(object sender, EventArgs e)
{
FrmSearchStaff childSearchStaff = new FrmSearchStaff();
childSearchStaff.MdiParent = this;
childSearchStaff.Show();
}
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benjamin yap,
Set a bool to be true when you open the form and false when the form is closed. And just add:
If (_isOpened)
return;
Above when you create the form.
Regards,
Gareth.
Regards,
Gareth.
(FKA gareth111)
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Hmm where do i declare the bool. and why have to use _ for isOpen?
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Where do i create a private variable.. I got more then 1 child form .. so i have to create individual _isOpen attribute for each childform? wat if a few differnt child form is open...
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Go through the collection of forms in the parent's MDIChildren (IIRC) and check if the form type exist in the collection. If it doesn't exist, make a new one and display it. If it does exist, activate the existing form.
You may want to have a flag or attribute to mark forms that can be opened multiple times and forms that can only be opened once.
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can you give me some example? i just started c# few days back. Please pardon me
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public class FormManager
{
private MainForm mainForm;
public FormManager(MainForm mainForm)
{
this.mainForm = mainForm;
}
public virtual System.Windows.Forms.Form GetForm(Type type, object[] args)
{
return GetMDIForm(type, args);
}
private ChildForm GetChildMDIForm(Type type)
{
for (int i = 0; i < mainForm.MdiChildren.Length; i++)
{
if (mainForm.MdiChildren[i].GetType().Equals(type))
{
return (ChildForm)mainForm.MdiChildren[i];
}
}
return null;
}
public virtual ChildForm GetMDIForm(Type type, object[] args)
{
ChildForm form = null;
bool allowMultiple = false;
object[] attributes = type.GetCustomAttributes(typeof(ChildFormAttribute), false);
if (attributes.Length > 0)
{
allowMultiple = ((ChildFormAttribute)attributes[0]).AllowMulti;
}
if (!allowMultiple)
{
form = GetChildMDIForm(type);
}
if (form == null)
{
form = CreateChildMDIForm(type, args);
if (form != null)
{
form.MdiParent = mainForm;
form.WindowState = FormWindowState.Maximized;
form.Show()
}
else
{
throw new Exception(string.Format("Unable to create form of type '{0}'", type.ToString()));
}
}
else
{
form.BringToFront();
}
return form;
}
private ChildForm CreateChildMDIForm(Type type, object[] args)
{
ConstructorInfo ci = type.GetConstructor(System.Type.EmptyTypes);
ChildForm form = (ChildForm)ci.Invoke(args);
return form;
}
public void ShowRole()
{
Wine.Global.FormManager.Instance.GetForm(typeof(Wine.UI.Role), null);
}
}
[ChildFormAttribute(false)]
public partial class Role : ChildForm
{
public Role()
: base()
{
InitializeComponent();
}
}
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
public class ChildFormAttribute : System.Attribute
{
private bool allowMulti;
public bool AllowMulti
{
get
{
return allowMulti;
}
}
public ChildFormAttribute(bool allowMulti)
{
this.allowMulti = allowMulti;
}
}
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Hi, i have a form which is size 500 * 300
I have groupbox, textboxes, and buttons inside that form. When the form is loading into my main mdi parent form, its size is 500*300, when i maximize the childform, my controls all are at the position top left. How do i make it center( when the window is maximize) depending on the screen size?
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Hello everyone,
Two questions about XMLSerializer.
http://msdn.microsoft.com/en-us/library/system.xml.serialization.xmlserializer(VS.80).aspx
1.
It is mentioned -- "To increase performance, the XML serialization infrastructure dynamically generates assemblies to serialize and deserialize specified
types."
What means the assemblies?
2.
For the following sample, why creates two XMLSerializer instances, one is s and the other is ser?
Hashtable serializers = new Hashtable();
XmlSerializer s = new XmlSerializer(typeof(MyClass), myRoot);
object key = GenerateKey(typeof(MyClass), myRoot);
XmlSerializer ser = (XmlSerializer)serializers[key];
if (ser == null)
{
ser = new XmlSerializer(typeof(MyClass), myRoot);
serializers[key] = ser;
}
else
{
}
thanks in advance,
George
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George_George wrote: What means the assemblies?
Are you kidding? http://www.google.com/search?hl=en&q=MSDN+%22What+is+an+assembly%22&btnG=Search[^]
George_George wrote: For the following sample, why creates two XMLSerializer instances, one is s and the other is ser?
They are two different samples as discussed in the text preceding the sample code section of the documentation. See the text and the use of the word "otherwise".
led mike
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1.The XML Serializer creates an XML serialization assembly per type that you are trying to Serialize\DeSerialize.
you can increase performance using precompiled serialization assembly that you are creating using the sgen.exe utility.
2.Sorry but i dont have a clue for this one.
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Thanks nissims,
1.
You mean CLR will create a new assembly (DLL/EXE) for each type I need to serialize, other than using existing CLR assembly (e.g. System.XML.dll)?
For example, when I want to serialize type Foo, CLR will create something like FooSerialize.dll?
2.
The additional dynamically created assembly will be deleted when I unload the Appdomain? And next time when I run my assembly again, each of the dynamically created assemblies will be created again?
3.
My assembly will invoke the dynamically created assemblies to do serialize/deserialize?
4.
"using precompiled serialization assembly that you are creating using the sgen.exe utility" -- do you have any samples or reference documents?
regards,
George
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Hi,
I'm trying to convince a friend of mine to learn C#, and he's looking for a good book to start with. He has experience with VB 6, but isn't very familiar with oop. Any suggestions? Thanks,
-Ken
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The C Programming Language by Kernighan & Ritchie, since a VB6 coder needs purification before approaching C# language.
(just kidding)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
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(and I meant to put first)
After you read The C Programming Language
Then read Programming Visual C# 2005: The Language by Donis Marshall
Then read CLR Via C# by Jeffrey Richter
I have thousands of dollars invested in manuals and these two were by far the best in my library.
Scott P
“It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.”
-Edsger Dijkstra
modified on Tuesday, May 13, 2008 11:32 AM
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Possibly you wanted to reply the OP,anyway, thank you.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
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I dont think you want to leave us and c++,right? 
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What are you doing here, child? Back to C++ forum, immediately!
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
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