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I have an XML document on a cfm page and need to access the XMLdocument struct to sample the data in it. There will only ever be 1 record at a time in the XML. I don't have much C# experience and am having trouble with the transfer of the data from windows application through the web interface and back to the native windows application again. I can supply code if it would be of any assistance. Thanks Fro looking.
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Hello,
I have a more ore or less complicated business object, that looks
similar to this:
<entry>
has some properties (id, pubdate...)
and a list of <version>s
each <version> has a language, a title and a description
Entry also has a list of s
each , has a List of <imageinfo>s with language, title and description
To edit the objects properties I created a similar structure of controls
<entrycontrol> has some Textboxes, a Tabstrip, holdig Tabs
corresponding to <version>s, again holding some Textboxes, and a list of
<imagescontrol>s with their <imageinfocontrol>s.
The question is, should the control A) know of the business object it
represents?
Should I instantiate EntryControl like this?
Entry e = Entry.GetEntry("abc");
EntryControl ec = new EntryControl(e);
and "inside" of EntryControl my Properties would be
public string Id {<br />
get { return entry.Id; }<br />
set {<br />
entry Id = value;<br />
TextBoxId.Text = value;<br />
}<br />
}<br />
<br />
and have problems, once the user edits the fields, a call to Id, would
still yield the object's value and not the textbox' new text value.
But I'd have the advantage (still in Entry) that I could much better
encapsulate the child controls creation and logic.
public EntryControl(Entry entry) {<br />
VersionControl versionControl = new VersionControl();<br />
versionControl.Versions = entry.Versions
}
or B) should my Controls be completely agnostic containers of agnostic
sub controls (as the generic .net controls are)
Instead:
class EntryControl {<br />
private Textbox textBoxId, textBoxPubDate;<br />
<br />
public string Id {<br />
get {return textBoxId.Text; }<br />
set {textBoxId.Text = value; }<br />
}<br />
<br />
public VersionControl VersionControl;<br />
}<br />
<br />
class Client {<br />
void DoSomething() {<br />
Entry e = Entry.GetEntry("abc");<br />
EntryControl ec = new EntryControl();<br />
ec.Id = e.Id;<br />
ec.VersionControl = new VersionControl();<br />
foreach(Version v in e.Versions) {<br />
VersionTab tab = new VersionTab();
tab.Title = v.Title;<br />
ec.VersionControl.Tabs.Add(tab);<br />
}<br />
}<br />
}
What is your opinion? What is the best pattern in relation business
objects vs controls.
To me it seems version A encapsulates better, is easier to read and is
more comfortable to use. But concurrency makes it less attractive;
B has the advantage of dumb controls that cannot do anything wrong,
but writing the client code is an ugly hack. Still there would be no mingling of business and representation layer, which I think is of advantage.
Any beautiful patterns, recomendations, ...?
Thanks!
--
Jan
www.limpens.com
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A - the business object layer shouldn't know anything of how the data will be presented.
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Neither in A or B the businesslayer has any knowledge of it's representation (in my examples)
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Hi,
How can i check 50 answers which are all typed in a textbox when a button is pressed?
This is what i had:
private int[] answer = new int[51];
for (int i = 1; i < 51; i++)
{
if (this.answer[i] == int.Parse(((TextBox)Controls["TextBox"+i.ToString()]).Text))
{
//label.ForeColor = Color.Green;
MessageBox.Show("testtttt");
}
}
Anyone got a better suggestion? Because this is somehow not efficient.
Thanks in advance!
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Yustme wrote: new int[51];
If you only have 50 things, why are you creating an array of 51 items?
Yustme wrote: for (int i = 1; i < 51; i++)
Why do you start the iteration on the second item. Why don't you use the first item in the array?
Yustme wrote: (((TextBox)Controls["TextBox"+i.ToString()]).
Why not have an array of TextBoxes (TextBox[]) preset up. Then when you iterate through them you don't have to do this?
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Hi Colin,
I changed it back as it was before:
for (int = 0... 50, i++)
What do you mean by preset the textbox's up?
I tried that, but it doens't recognize the 'Text' property.
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You have a loop that gets the text boxes that you need then processes them. The way it is finding the text boxes is inefficient. Do this step only once on the form load by populating a TextBox array. When you need to loop over all the text boxes, you are looping over a pre-built textbox array which is much more efficient than lookin up each textbox by name.
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Hi Colin,
I changed that now.
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Yustme wrote: TextBox[] textBox = new TextBox[50];
That initialises a new EMPTY array of text boxes
Yustme wrote: textBox.Text
You are attempting to get the text property from the ARRAY. You need to iterate over the array
e.g.
for(int i=0; i<50; i++)
{
TextBox currentTextBox = textBox[i];
if (this.answer[i] == int.Parse(currentTextBox.Text))
{
}
}
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Hi Colin,
That worked good, thanks!
Somehow my answer[i] is reversed. It contains the answer of the first label in the last index, instead of in the first index.
How can i change the way the array is filled?
-- modified at 9:01 Monday 16th October, 2006
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Yustme wrote: How can i change the way the array is filled?
How are you filling it now?
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Hi Colin,
I think i found the problem.
It was the way that C# generates the code where it put label1 at the bottom and label2 above it and so on.
I changed that. So it works fine now.
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hi
i set button1.image to an icon, but image was bigger than button and i want to fit in my button and set align to left, how to do ?(i was set other button.Image to icons and image fit to buttons but in this one image don't fit in my button)
thanks ...
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Use Image list.Put Images in image List and set the size.and then select desired Image Index and align image to middle left or at any desired place in button
sameer
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Hi dears,
I want to start programming a Messenger application like yahoo messenger,...!
But I dont know how to start or which features should I know?
I really tanks if sombody can help me!
www.behzadi.net
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if your concern with .Net Topics.so firstly go through following
1. Socket Programming
2. Multi Threading
3. Simple Encryption/Decryption
sameer
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Hi,
i am using c# and sql server 2000. i want to execute this below query in my application using oledb dataadapter.
sql query:
select preferencevalue from ParticipantPreference for xml raw;
(also the above column contains an XML data as a value in it.)
this query gives me an xml formatted correct output when i use SQL dataadapter.
If i use oledb dataadapter my result is in BYTE array format...
plz help me.
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I think it has something to do with oledb. Can you try the following with that byte array?
byte[] data = ...;
ASCIIEncoding.GetString(data);
WM.
What about weapons of mass-construction?
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I wrote a program needs to connect to remote servers,
my problem is - my program throw an exception when i try to connect from firewalled or proxy environment. the question is:
How can i import IE settings to my program?
OR "at least"
How can i the proxy settings in my program?
please help me with a piece of code or at least ClassName
please reply...
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Well, as far as getting the proxy settings from IE -- You can grab the ProxyServer value from HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyServer (REG_SZ); how you use this depends on what you're connecting to obviously...
<br />
RegistryKey key = Registry.CurrentUser;<br />
key = key.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Internet Settings");<br />
Console.WriteLine(key.GetValue("ProxyServer"));<br />
-- modified at 7:07 Monday 16th October, 2006
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Thanx,
but i still can not establish a connection becuase i cannot use that value or where i can use it in my connection
//establish TCP connection
try {
CallTrace(" Connect at port {0}", port);
serverTcpConnection = new TcpClient(popServer, port);
} catch (Exception ex) {
throw new Pop3Exception("Connection to server "+ popServer + ", port " + port + " failed.\nRuntime Error: "+ex.ToString());
}
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I don't know how to play a sound from my program.
Example:when i click on button to play a sound.
I have Visual Studio 2003.
Help.
Vasildb
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Hi Vasildb,
put this in a static class:
public static bool Play (string filename)
{
return PlaySound (filename, IntPtr.Zero,0x00020000 |0x0000);
}
///
/// Plays A sound
///
/// <param name="szSound" />
/// <param name="hMod" />
/// <param name="flags" />
/// <returns>
[DllImport("winmm.dll", EntryPoint="PlaySound")]
private static extern bool PlaySound( string szSound, IntPtr hMod, int flags );
Got it from a forum and work perfect
Nassos
GanDad
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